List of nuclides

This table of nuclides shows the 896 observed nuclides that either are stable or, if radioactive, have half-lives longer than one hour.

(A nuclide is defined conventionally as an experimentally examined bound collection of one or more protons and zero or more neutrons, that either is stable or has an observed decay mode.)

At least 3,000 nuclides have been experimentally characterized. Those not shown in this 896-member list all have decay half-lives less than 60 minutes.

Introduction

254 nuclides are considered stable. Many of these in theory could decay through spontaneous fission, alpha decay, double beta decay, etc. with a very long half-life, but no radioactive decay has yet been observed. Thus the number of stable nuclides is subject to change if some of these 254 are determined to be very long-lived radioactive nuclides in the future. If a decay has been predicted theoretically but never observed experimentally, it is given in parentheses. In theory, spontaneous fission is possible for all elements with atomic numbers >40, but has not been observed for most elements up to lead (82). The list lists nuclides unstable only to this fission mechanism, before nuclides theoretically unstable to additional mechanisms. Those that have been checked for radioactivity are indicated with "> number" and show the lower limit for the half-life based on experimental observation. Such nuclides are considered to be "stable" until a decay has been observed in some fashion. For example, tellurium-123 was reported to be radioactive, but the same experimental group later retracted this report, and it presently remains observationally stable.

The next group is the primordial radioactive nuclides. These have been measured to be radioactive, or decay products have been identified (Te-130, Ba-130). There are (currently) 34 of these, of which 28 have half-lives considerably longer than the age of the universe (13.8 billion years). With most of these 28, decay is difficult to observe and for most purposes they can be regarded as effectively stable. bismuth-209 is notable as the only natural occurring isotope of an element long considered stable. A further 4 nuclides, thorium-232, uranium-238, potassium-40 and uranium-235 have half lives between 14 billion and 700 million years, which means they have experienced measurable decay since the formation of the solar system about 4.6 billion years ago, but still exist on earth in significant quantities. They are the primary source of radiogenic heat and radioactive decay products. The final two, plutonium-244 and samarium-146 have half-lives just long enough (80 and 68 million years) to survive from the formation of the solar system and be present on earth in trace quantities (having survived 57 and 67 half lives). Together, there are a total of 288 primordial nuclides.

The list then covers the ~700 radionuclides with half-lives longer than 1 hour. There are also more than 3000 radionuclides with half lives less than an hour, listed are those that exist naturally in decay chains

Over 60 nuclides that have half-lives too short to be primordial can be detected in nature as a result of later production by natural processes, mostly in trace amounts. These include ~44 radionuclides occurring in the decay chains of primordial uranium and thorium (radiogenic nuclides), such as Radon-222. Others are the products of interactions with energetic cosmic-rays (e.g. cosmic ray spallation) (cosmogenic nuclides) such as carbon-14. This gives a total of about 350 naturally occurring nuclides. Other nuclides may be occasionally produced naturally but are difficult to detect by rare cosmogenic interactions or as a result of other natural nuclear reactions (nucleogenic nuclides).

Further shorter lived nuclides have been detected in the spectra of stars (technetium, promethium, californium). The remaining nuclides are known solely from artificial nuclear transmutation. Some, such as caesium-137, are found in the environment but as a result of contamination from man-made nuclear fission product releases (nuclear weapons, nuclear reactors, and other processes).

Summary table for numbers of each class of nuclides

This is a summary table of decay class for the 902 nuclides with half-lives longer than one hour, given in this list of nuclides. Numbers may change slightly in the future, as nuclides radioactive only in theory are observed to be radioactive, half-life measurements improve, or new isotopes are discovered.

Stability class	Number of nuclides	Running total	Notes
Stable nuclides	254	254
Radioactive primordial nuclides.	34	288	Total primordial elements include bismuth, uranium, thorium, plutonium, plus all stable elements.
Radioactive non-primordial, but naturally occurring on Earth.	~ 51	~ 339	Carbon-14 (and other isotopes generated by cosmic rays); daughters of radioactive primordials, such as francium, etc.
Radioactive synthetic (half-life > 1 hour).	>557	>896	Includes most useful radiotracers. The 896 nuclides with half-life >1h are listed in this article; there are some more short-lived natural isotopes.
Radioactive synthetic (half-life < 1 hour).	>2404	>3300	Running total includes all well-characterized synthetic nuclides.

List legend

All the radionuclides, starting with the longest-lived primordial radionuclides, are sorted by decreasing half-life, given in seconds. For more convenient units, half-lives must be divided by the corresponding number of seconds in the time unit (for example, half-life in seconds must be divided by 31,556,926 to obtain half-life in years).

no (number)

A running positive integer for reference. Especially for nuclides with short half-lives, this number, i.e. position in this table, might be changed in the future.

nuclide column

Nuclide identifiers are given by their mass number A and the symbol for the corresponding chemical element (implies a unique proton number). In the rare case that this is not the ground state, this is indicated by a m for metastable appended to the mass number.

energy column

The column labeled "energy" denotes the energy equivalent of the difference between the mass per nucleon of this nuclide and the mass of a neutron (so all nuclides get a positive value) in MeV, formally: m_n − m_nuclide / A.

half-life column

All times are given in seconds (3.1556926×10⁷ s = 1 year). Entries starting with a ">" indicates that no decay has ever been observed, with null experiments establishing lower limits for the half-life. Such elements are considered stable unless a decay can be observed (establishing an actual estimate for the half-life).

decay mode column

α	α decay
β−	β− decay
ε	electron capture
β+	β+ decay
SF	spontaneous fission
β−β−	double β− decay
β+β+	double β+ decay
IT	isomeric transition
p	proton emission
n	neutron emission

Decay modes in parentheses are still not observed through experiment but are, by their energy, predicted to occur. Spontaneous fission is not shown as a theoretical decay mode for stable nuclides where other modes are possible.

decay energy column

Multiple values for (maximal) decay energy are mapped to decay modes in their order. The decay energy listed is for the specific nuclide only, not for the whole decay chain. It includes the energy lost to neutrinos.

List of Nuclides

Stable nuclides

no	nuclide	A	Z	N	energy	half-life	decay mode	decay energy (Mev)
1	56Fe	56	26	30	9.153567
2	62Ni	62	28	34	9.147877
3	60Ni	60	28	32	9.145862
4	58Fe	58	26	32	9.142938
5	52Cr	52	24	28	9.137037
6	57Fe	57	26	31	9.127119
7	59Co	59	27	32	9.126046
8	54Cr	54	24	30	9.125633
9	61Ni	61	28	33	9.124129
10	55Mn	55	25	30	9.120611
11	64Ni	64	28	36	9.119754
12	66Zn	66	30	36	9.115258
13	53Cr	53	24	29	9.114435
14	63Cu	63	29	34	9.112272
15	65Cu	65	29	36	9.106154
16	68Zn	68	30	38	9.100845
17	50Ti	50	22	28	9.099861
18	51V	51	23	28	9.094884
19	67Zn	67	30	37	9.084468
20	48Ti	48	22	26	9.081488
21	72Ge	72	32	40	9.079465
22	70Ge	70	32	38	9.079372
23	69Ga	69	31	38	9.076078
24	88Sr	88	38	50	9.070438
25	74Ge	74	32	42	9.063522
26	49Ti	49	22	27	9.062323
27	76Se	76	34	42	9.061485
28	71Ga	71	31	40	9.059218
29	78Se	78	34	44	9.058842
30	90Zr	90	40	50	9.057631
31	89Y	89	39	50	9.056743
32	86Sr	86	38	48	9.054160
33	82Kr	82	36	46	9.054126
34	84Kr	84	36	48	9.052649
35	73Ge	73	32	41	9.048006
36	87Sr	87	38	49	9.046964
37	75As	75	33	42	9.045093
38	80Kr	80	36	44	9.044984
39	77Se	77	34	43	9.040153
40	85Rb	85	37	48	9.037998
41	91Zr	91	40	51	9.037156
42	83Kr	83	36	47	9.034966
43	79Br	79	35	44	9.034220
44	81Br	81	35	46	9.033979
45	92Zr	92	40	52	9.032783
46	46Ti	46	22	24	9.030532
47	47Ti	47	22	25	9.027336
48	44Ca	44	20	24	9.013793
49	42Ca	42	20	22	8.989116
50	38Ar	38	18	20	8.984870
51	45Sc	45	21	24	8.983945
52	43Ca	43	20	23	8.964551
53	34S	34	16	18	8.951675
54	40Ar	40	18	22	8.947325
55	41K	41	19	22	8.938623
56	39K	39	19	20	8.938174
57	37Cl	37	17	20	8.929760
58	36S	36	16	20	8.923108
59	35Cl	35	17	18	8.900285
60	30Si	30	14	16	8.885761
61	32S	32	16	16	8.884318
62	33S	33	16	17	8.876964
63	31P	31	15	16	8.859744
64	28Si	28	14	14	8.838935
65	29Si	29	14	15	8.826327
66	27Al	27	13	14	8.708242
67	26Mg	26	12	14	8.694981
68	24Mg	24	12	12	8.651911
69	25Mg	25	12	13	8.599047
70	23Na	23	11	12	8.485675
71	22Ne	22	10	12	8.436087
72	20Ne	20	10	10	8.423422
73	16O	16	8	8	8.367390
74	21Ne	21	10	11	8.344280
75	19F	19	9	10	8.149612
76	17O	17	8	9	8.118904
77	18O	18	8	10	8.114744
78	12C	12	6	6	8.071327
79	15N	15	7	8	8.064594
80	14N	14	7	7	7.866827
81	13C	13	6	7	7.830943
82	4He	4	2	2	7.465077
83	11B	11	5	6	7.283337
84	10B	10	5	5	6.866257
85	9Be	9	4	5	6.810483
86	7Li	7	3	4	5.941599
87	6Li	6	3	3	5.723527
88	3He	3	2	1	3.094327
89	2H	2	1	1	1.503327
90	1H	1	1	0	0.782327
91	94Mo	94	42	52	9.011856		(SF)	< 4.485
92	93Nb	93	41	52	9.009051		(SF)	< 0.943
93	96Mo	96	42	54	8.996229		(SF)	< 5.771
94	95Mo	95	42	53	8.994564		(SF)	< 4.531
95	97Mo	97	42	55	8.973806		(SF)	< 6.226
96	98Ru	98	44	54	8.971572		(SF)	< 11.690
97	100Ru	100	44	56	8.963517		(SF)	< 13.634
98	99Ru	99	44	55	8.956348		(SF)	< 12.368
99	102Ru	102	44	58	8.944837		(SF)	< 12.049
100	101Ru	101	44	57	8.942117		(SF)	< 13.205
101	104Pd	104	46	58	8.930847		(SF)	< 18.969
102	103Rh	103	45	58	8.925910		(SF)	< 15.462
103	106Pd	106	46	60	8.919460		(SF)	< 16.806
104	105Pd	105	46	59	8.913356		(SF)	< 18.247
105	108Pd	108	46	62	8.900253		(SF)	< 16.102
106	107Ag	107	47	60	8.897514		(SF)	< 20.512
107	110Cd	110	48	62	8.892718		(SF)	< 22.486
108	109Ag	109	47	62	8.885300		(SF)	< 19.241
109	112Cd	112	48	64	8.880077		(SF)	< 20.733
110	111Cd	111	48	63	8.875445		(SF)	< 21.883
111	114Sn	114	50	64	8.865722		(SF)	< 27.965
112	113In	113	49	64	8.862212		(SF)	< 24.281
113	116Sn	116	50	66	8.860362		(SF)	< 25.905
114	115Sn	115	50	65	8.854249		(SF)	< 26.791
115	118Sn	118	50	68	8.848073		(SF)	< 23.815
116	117Sn	117	50	67	8.843977		(SF)	< 25.334
117	120Sn	120	50	70	8.830537		(SF)	< 21.824
118	119Sn	119	50	69	8.828201		(SF)	< 23.140
119	121Sb	121	51	70	8.811783		(SF)	< 25.718
120	122Te	122	52	70	8.811606		(SF)	< 30.974
121	124Te	124	52	72	8.801364		(SF)	< 28.221
122	123Sb	123	51	72	8.796727		(SF)	< 23.454
123	126Te	126	52	74	8.786126		(SF)	< 26.011
124	125Te	125	52	73	8.783505		(SF)	< 26.966
125	128Xe	128	54	74	8.773359		(SF)	< 35.047
126	127I	127	53	74	8.771981		(SF)	< 29.961
127	130Xe	130	54	76	8.762725		(SF)	< 32.483
128	129Xe	129	54	75	8.758904		(SF)	< 33.947
129	132Xe	132	54	78	8.747695		(SF)	< 30.885
130	131Xe	131	54	77	8.746253		(SF)	< 31.140
131	134Ba	134	56	78	8.735133		(SF)	< 40.520
132	133Cs	133	55	78	8.733515		(SF)	< 34.753
133	136Ba	136	56	80	8.724908		(SF)	< 38.041
134	135Ba	135	56	79	8.722072		(SF)	< 39.357
135	137Ba	137	56	81	8.711628		(SF)	< 35.722
136	138Ba	138	56	82	8.710904		(SF)	< 34.302
137	140Ce	140	58	82	8.700494		(SF)	< 43.633
138	139La	139	57	82	8.698892		(SF)	< 38.944
139	141Pr	141	59	82	8.681405		(SF)	< 48.450
140	142Nd	142	60	82	8.676646		(SF)	< 53.264
141	156Gd	156	64	92	8.536342		(SF)	< 71.541
142	157Gd	157	64	93	8.522478		(SF)	< 70.531
143	158Gd	158	64	94	8.518775		(SF)	< 70.965
144	159Tb	159	65	94	8.508680		(SF)	< 74.878
145	163Dy	163	66	97	8.478607		(SF)	< 79.055
146	164Dy	164	66	98	8.473604		(SF)	< 79.499
147	54Fe	54	26	28	9.113040		(β+β+)	0.6800
148	58Ni	58	28	30	9.109736		(β+β+)	1.9258
149	74Se	74	34	40	9.047175		(β+β+)	1.2094
150	80Se	80	34	46	9.043326		(β−β−)	0.1339
151	86Kr	86	36	50	9.039532		(β−β−)	1.2556
152	84Sr	84	38	46	9.031375		(β+β+)	1.7867
153	92Mo	92	42	50	9.014860		(β+β+)	1.6491
154	94Zr	94	40	54	8.999698		(β−β−)	1.1440
155	98Mo	98	42	56	8.970426		(β−β−)	0.1125
156	96Ru	96	44	52	8.967911		(β+β+)	2.7188
157	102Pd	102	46	56	8.933337		(β+β+)	1.1720
158	104Ru	104	44	60	8.918337		(β−β−)	1.2997
159	36Ar	36	18	18	8.911105		(β+β+)	0.4335
160	110Pd	110	46	64	8.874500		(β−β−)	1.9997
161	112Sn	112	50	62	8.862944		(β+β+)	1.9222
162	122Sn	122	50	72	8.808590		(β−β−)	0.3661
163	124Sn	124	50	74	8.782914		(β−β−)	2.2870
164	126Xe	126	54	72	8.779010		(β+β+)	0.8973
165	143Nd	143	60	83	8.658792		(α)	0.5214
166	144Sm	144	62	82	8.640577		(β+β+, α)	1.7811, 0.0761
167	145Nd	145	60	85	8.632963		(α)	1.5784
168	146Nd	146	60	86	8.625649		(β−β−, α)	0.0702, 1.1822
169	148Nd	148	60	88	8.594388		(β−β−, α)	1.9288, 0.5986
170	150Sm	150	62	88	8.585043		(α)	1.4495
171	152Sm	152	62	90	8.563227		(α)	0.2203
172	153Eu	153	63	90	8.550893		(α)	0.2736
173	154Gd	154	64	90	8.549985		(α)	0.0812
174	154Sm	154	62	92	8.541857		(β−β−)	1.2510
175	155Gd	155	64	91	8.536341		(α)	0.0812
176	156Dy	156	66	90	8.523443		(β+β+, α)	2.0108, 1.7579
177	158Dy	158	66	92	8.516973		(β+β+, α)	0.2833, 0.8748
178	160Dy	160	66	94	8.506816		(α)	0.4387
179	161Dy	161	66	95	8.494067		(α)	0.3443
180	162Dy	162	66	96	8.492234		(α)	0.0847
181	162Er	162	68	94	8.480852		(β+β+, α)	1.8445, 1.6460
182	164Er	164	68	96	8.473462		(β+β+, α)	0.0241, 1.3041
183	165Ho	165	67	98	8.464689		(α)	0.1394
184	166Er	166	68	98	8.462482		(α)	0.8309
185	167Er	167	68	99	8.450350		(α)	0.6657
186	168Er	168	68	100	8.446308		(α)	0.5527
187	168Yb	168	70	98	8.437845		(β+β+, α)	1.4221, 1.9508
188	169Tm	169	69	100	8.433931		(α)	1.2004
189	170Yb	170	70	100	8.428792		(α)	1.7376
190	170Er	170	68	102	8.424945		(β−β−, α)	0.6536, 0.0502
191	171Yb	171	70	101	8.418182		(α)	1.5589
192	172Yb	172	70	102	8.415864		(α)	1.3103
193	173Yb	173	70	103	8.404023		(α)	0.9459
194	174Yb	174	70	104	8.398624		(α)	0.7401
195	175Lu	175	71	104	8.386589		(α)	1.6197
196	176Hf	176	72	104	8.381427		(α)	2.2550
197	177Hf	177	72	105	8.370139		(α)	2.2449
198	178Hf	178	72	106	8.365958		(α)	2.0832
199	179Hf	179	72	107	8.353293		(α)	1.8065
200	180Hf	180	72	108	8.347930		(α)	1.2828
201	181Ta	181	73	108	8.338961		(α)	1.5259
202	185Re	185	75	110	8.308204		(α)	2.1947
203	187Os	187	76	111	8.291746		(α)	2.7202
204	188Os	188	76	112	8.290138		(α)	2.1426
205	189Os	189	76	113	8.277599		(α)	1.9757
206	190Os	190	76	114	8.275045		(α)	1.3784
207	191Ir	191	77	114	8.263508		(α)	2.0839
208	192Pt	192	78	114	8.260353		(α)	2.4181
209	192Os	192	76	116	8.258202		(β−β−, α)	0.4135, 0.3622
210	194Pt	194	78	116	8.250519		(α)	1.5045
211	193Ir	193	77	116	8.250259		(α)	1.0173
212	195Pt	195	78	117	8.239516		(α)	1.1581
213	196Pt	196	78	118	8.237896		(α)	0.7942
214	196Hg	196	80	116	8.233710		(β+β+, α)	0.8197, 2.0273
215	197Au	197	79	118	8.229404		(α)	0.9545
216	198Hg	198	80	118	8.227663		(α)	1.3833
217	198Pt	198	78	120	8.222378		(β−β−, α)	1.0472, 0.0870
218	199Hg	199	80	119	8.219805		(α)	0.8242
219	200Hg	200	80	120	8.218848		(α)	0.7178
220	201Hg	201	80	121	8.208956		(α)	0.3341
221	202Hg	202	80	122	8.206703		(α)	0.1363
222	203Tl	203	81	122	8.198230		(α)	0.9108
223	204Hg	204	80	124	8.192358		(β−β−)	0.4163
224	205Tl	205	81	124	8.187526		(α)	0.1567
225	206Pb	206	82	124	8.186791		(α)	1.1366
226	207Pb	207	82	125	8.179791		(α)	0.3915
227	208Pb	208	82	126	8.175888		(α)	0.5188
228	134Xe	134	54	80	8.728973	> 1.830×1030	β−β−	0.825
229	40Ca	40	20	20	8.942485	> 9.467×1028	β+β+	0.194
230	132Ba	132	56	76	8.741288	> 9.467×1028	β+β+	0.846
231	78Kr	78	36	42	9.022349	> 7.258×1027	β+β+	2.846
232	160Gd	160	64	96	8.496009	> 9.783×1026	β−β−	1.729
233	184W	184	74	110	8.319737	> 9.152×1026	α	1.656
234	186W	186	74	112	8.299873	> 8.521×1026	α	1.123
235	183W	183	74	109	8.324699	> 4.102×1026	α	1.680
236	182W	182	74	108	8.336424	> 2.619×1026	α	1.772
237	114Cd	114	48	66	8.860985	> 2.020×1026	β−β−	0.540
238	50Cr	50	24	26	9.076517	> 4.102×1025	β+β+	1.167
239	108Cd	108	48	60	8.897735	> 3.156×1025	β+β+	0.272
240	142Ce	142	58	84	8.666666	> 8.205×1024	β−β−, (α)	1.417, 1.298
241	106Cd	106	48	58	8.893327	> 8.205×1024	β+β+	2.770
242	176Yb	176	70	106	8.375271	> 5.049×1024	β−β−, (α)	1.083, 0.570
243	204Pb	204	82	122	8.194414	> 4.418×1024	α	1.972
244	124Xe	124	54	70	8.778264	> 3.471×1024	β+β+	2.864
245	123Te	123	52	71	8.796302	> 2.903×1024	β+	0.052
246	64Zn	64	30	34	9.102634	> 8.836×1023	(β+β+)	1.096
247	120Te	120	52	68	8.816369	> 6.943×1023	β+β+	1.700
248	70Zn	70	30	40	9.065109	> 4.102×1023	β−β−	0.998
249	46Ca	46	20	26	9.009047	> 8.836×1022	β−β−	0.988
250	149Sm	149	62	87	8.589058	> 6.312×1022	α	1.870
251	180mTa	180	73	107	8.342767	> 3.787×1022	(β−, K, α)	0.783, 0.929, 2.103
252	138Ce	138	58	80	8.705878	> 2.840×1021	β+β+	0.694
253	136Ce	136	58	78	8.707122	> 2.209×1021	β+β+	2.419
254	184Os	184	76	108	8.311850	> 1.767×1021	α, (β+β+)	2.963, 1.451

Primordial radioactive nuclides

no nuclide energy half-life (sec) decay mode decay energy (MeV) half-life (years) 255 128Te 8.743261 6.94×1031 β−β− 2.530 2.2×1024 256 136Xe 8.706805 7.5×1028 β−β− 2.462 2.38×1021 257 76Ge 9.034656 5.6423×1028 β−β− 2.039 1.8×1021 258 130Ba 8.742574 3.79×1028 KK 2.620 1.2×1021 259 82Se 9.017596 3.408×1027 β−β− 2.995 1.1×1020 260 116Cd 8.836146 9.783×1026 β−β− 2.809 3.102×1019 261 48Ca 8.992452 7.258×1026 β−β−, β− 4.274, 0.0058 2.301×1019 262 96Zr 8.961359 6.3×1026 β−β− 3.348 2.0×1019 263 209Bi 8.158689 5.996×1026 α 3.137 1.9×1019 264 130Te 8.766578 2.777×1026 β−β− 0.868 8.806×1018 265 150Nd 8.562594 2.493×1026 β−β− 3.367 7.905×1018 266 100Mo 8.933167 2.461×1026 β−β− 3.035 7.804×1018 267 151Eu 8.565759 1.578×1026 α 1.9644 5.004×1018 268 180W 8.347127 5.680×1025 α 2.509 1.801×1018 269 50V 9.055759 4.418×1024 β+, β− 2.205, 1.038 1.4×1017 270 113Cd 8.859372 2.430×1023 β− 0.321 7.7×1015 271 148Sm 8.607423 2.209×1023 α 1.986 7.005×1015 272 144Nd 8.652947 7.227×1022 α 1.905 2.292×1015 273 186Os 8.302508 6.312×1022 α 2.823 2.002×1015 274 174Hf 8.392287 6.312×1022 α 2.497 2.002×1015 275 115In 8.849910 1.392×1022 β− 0.499 4.4×1014 276 152Gd 8.562868 3.408×1021 α 2.203 1.1×1014 277 190Pt 8.267764 2.051×1019 α 3.252 6.5×1011 278 147Sm 8.610593 3.345×1018 α 2.310 1.061×1011 279 138La 8.698320 3.219×1018 K, β− 1.737, 1.044 1.021×1011 280 87Rb 9.043718 1.568×1018 β− 0.283 4.972×1010 281 187Re 8.291732 1.300×1018 β−, α 0.0026, 1.653 4.122×1010 282 176Lu 8.374665 1.187×1018 β− 1.193 3.764×1010 283 232Th 7.918533 4.434×1017 α, SF 4.083 1.406×1010 284 238U 7.872551 1.410×1017 α, SF 4.270 4.471×109 285 40K 8.909707 3.938×1016 β−, K, β+ 1.311, 1.505, 1.505 1.25×109 286 235U 7.897198 2.222×1016 α, SF 4.679 704×106 287 146Sm 8.626136 3.250×1015 α 2.529 103×106 288 244Pu 7.826221 2.525×1015 α, SF 4.666 80×106

Radionuclides with a half life of 1 day to 50 million years

no	nuclide	energy	half-life (sec)	decay mode	half-life (years or days)
289	92Nb	9.010980	1.095×1015	β+, β-	3.470×107 y
290	236U	7.891470	7.391×1014	α, SF	2.342×107 y
291	205Pb	8.187279	5.459×1014	β+	1.730×107 y
292	129I	8.757397	4.955×1014	β−	1.570×107 y
293	247Cm	7.806008	4.923×1014	α	1.560×107 y
294	182Hf	8.324399	2.809×1014	β−	8.901×106 y
295	107Pd	8.897197	2.051×1014	β−	6.499×106 y
296	98Tc	8.953246	1.325×1014	β−	4.199×106 y
297	53Mn	9.103175	1.180×1014	β+	3.739×106 y
298	210mBi	8.140473	9.594×1013	α	2.579615×106 y
299	154Dy	8.528457	9.467×1013	α	3.000×106 y
300	60Fe	9.094861	8.268×1013	β−	2.620×106 y
301	97Tc	8.970503	8.203×1013	β+	2.600×106 y
302	135Cs	8.720082	7.258×1013	β−	2.300×106 y
303	237Np	7.881989	6.766×1013	α, SF	2.144×106 y
304	150Gd	8.576454	5.649×1013	α	1.790×106 y
305	93Zr	9.008069	4.828×1013	β−	1.530×106 y
306	10Be	6.810657	4.765×1013	β−	1.510×106 y
307	26Al	8.540954	2.263×1013	β+	7.171×105 y
308	242Pu	7.845218	1.183×1013	α, SF	3.749×105 y
309	208Bi	8.162049	1.161×1013	β+	3.679×105 y
310	248Cm	7.799586	1.098×1013	α, SF	3.479×105 y
311	36Cl	8.891380	9.499×1012	β−, β+	3.010×105 y
312	79Se	9.032310	9.309×1012	β−	2.950×105 y
313	234U	7.908308	7.747×1012	α, SF	2.455×105 y
314	126Sn	8.754026	7.258×1012	β−	2.230×105 y
315	81Kr	9.030513	7.227×1012	β+	2.290×105 y
316	99Tc	8.953379	6.662×1012	β−	2.111×105 y
317	186mRe	8.295958	6.312×1012	IT	2.000×105 y
318	233U	7.912873	5.024×1012	α, SF	1.592×105 y
319	236Np	7.887514	4.860×1012	β+, β−, α	1.540×105 y
320	41Ca	8.928347	3.219×1012	β+	1.020×105 y
321	59Ni	9.107863	2.398×1012	β+	7.599×104 y
322	230Th	7.937136	2.379×1012	α, SF	7.539×104 y
323	137La	8.707101	1.893×1012	β+	5.999×104 y
324	202Pb	8.199714	1.657×1012	β+, α	5.251×104 y
325	231Pa	7.926627	1.034×1012	α, SF	3.277×104 y
326	239Pu	7.868022	7.609×1011	α, SF	2.411×104 y
327	94Nb	8.990099	6.406×1011	β−	2.030×104 y
328	245Cm	7.822329	2.682×1011	α, SF	8499 y
329	250Cm	7.779371	2.619×1011	SF, α, β−	8299 y
330	243Am	7.836035	2.326×1011	α, SF	7371 y
331	229Th	7.942127	2.316×1011	α	7339 y
332	240Pu	7.862465	2.070×1011	α, SF	6560 y
333	14C	7.855620	1.799×1011	β−	5701 y
334	246Cm	7.816781	1.502×1011	α, SF	4760 y
335	163Ho	8.478591	1.442×1011	β+	4570 y
336	93Mo	9.004693	1.262×1011	β+	3999 y
337	226Ra	7.966597	5.049×1010	α	1600 y
338	247Bk	7.806182	4.355×1010	α	1380 y
339	166mHo	8.451273	3.787×1010	β−	1200 y
340	251Cf	7.775969	2.834×1010	α, SF	898 y
341	91Nb	9.023327	2.146×1010	β+	680 y
342	194Hg	8.237271	1.401×1010	β+	444 y
343	108mAg	8.881439	1.382×1010	β+, IT	437.9 y
344	241Am	7.851676	1.364×1010	α, SF	432.2 y
345	249Cf	7.791305	1.108×1010	α, SF	351.1 y
346	39Ar	8.923686	8.489×109	β−	269 y
347	192mIr	8.251875	7.605×109	IT	241 y
348	158Tb	8.511055	5.680×109	β+, β−	180 y
349	242mAm	7.841913	4.450×109	IT, α, SF	141 y
350	32Si	8.823856	4.166×109	β−	132 y
351	209Po	8.149633	3.951×109	α, β+	125.2 y
352	63Ni	9.111210	3.159×109	β-	100.1 y
353	151Sm	8.565251	2.840×109	β-	90.0 y
354	238Pu	7.877358	2.768×109	α, SF	87.71 y
355	157Tb	8.522096	2.241×109	β+	71.02 y
356	148Gd	8.586706	2.237×109	α	70.89 y
357	232U	7.922143	2.174×109	α, SF	68.89 y
358	44Ti	8.924702	1.893×109	β+	59.99 y
359	193Pt	8.249965	1.578×109	β+	50.0 y
360	121mSn	8.808499	1.385×109	IT, β-	43.89 y
361	150Eu	8.569974	1.164×109	β+	36.89 y
362	207Bi	8.168209	1.038×109	β+	32.89 y
363	42Ar	8.890923	1.038×109	β-	32.89 y
364	178m2Hf		9.776×108	IT	31 y
365	137Cs	8.703047	9.477×108	β-	30.03 y
366	243Cm	7.836004	9.183×108	α, β+, SF	29.1 y
367	90Sr	9.026239	9.120×108	β-	28.9 y
368	210Pb	8.141462	7.006×108	β-, α	22.2 y
369	227Ac	7.957447	6.871×108	β-, α	21.77 y
370	244Cm	7.831763	5.712×108	α, SF	18.1 y
371	145Pm	8.631838	5.586×108	β+, α	17.7 y
372	93mNb		5.084×108	IT	16.12 y
373	241Pu	7.851590	4.510×108	β-, α, SF	14.29 y
374	113mCd		4.380×108	β-, IT	13.89 y
375	152Eu	8.550897	4.262×108	β+, β-	13.51 y
376	250Cf	7.786640	4.128×108	α, SF	13.08 y
377	3H	3.087994	3.888×108	β-	12.32 y
378	85Kr	9.029919	3.384×108	β-	10.72 y
379	133Ba	8.729624	3.319×108	β+	10.52 y
380	248Bk	7.796811	> 2.840×108	α	9.00 y
381	154Eu	8.537200	2.711×108	β-, β+	8.591 y
382	194Os	8.238508	1.893×108	β-	5.999 y
383	228Ra	7.944390	1.815×108	β-	5.752 y
384	146Pm	8.615574	1.745×108	β+, β-	5.53 y
385	60Co	9.098811	1.663×108	β-	5.27 y
386	155Eu	8.534711	1.500×108	β-	4.753 y
387	204Tl	8.190671	1.193×108	β-, β+	3.781 y
388	174Lu	8.390726	1.045×108	β+	3.312 y
389	101Rh	8.936753	1.041×108	β+	3.299 y
390	102mRh	8.920680	9.152×107	β+, IT	2.9 y
391	208Po	8.155315	9.145×107	α, β+	2.898 y
392	236Pu	7.889536	9.019×107	α, SF	2.858 y
393	125Sb	8.777367	8.705×107	β-	2.759 y
394	55Fe	9.116407	8.637×107	β+	2.737 y
395	252Cf	7.769605	8.347×107	α, SF	2.645 y
396	147Pm	8.609068	8.279×107	β-	2.624 y
397	22Na	8.306891	8.213×107	β+	2.603 y
398	134Cs	8.719768	6.517×107	β-, β+	2.065 y
399	171Tm	8.417620	6.059×107	β-	1.92 y
400	228Th	7.953906	6.033×107	α	1.912 y
401	172Hf	8.399252	5.901×107	β+	1.87 y
402	179Ta	8.352703	5.743×107	β+	1.82 y
403	173Lu	8.400147	4.323×107	β+	1.37 y
404	252Es	7.764621	4.075×107	α, β+, β-	1.291 y
405	109Cd	8.883327	3.986×107	β+	1.263 y
406	235Np	7.896669	3.422×107	β+, α	1.084 y
407	106Ru	8.885686	3.228×107	β-	1.023 y
408	144Pm	8.636751	3.136×107	β+	363 d
409	145Sm	8.627590	2.938×107	β+	340 d
410	248Cf	7.800198	2.881×107	α, SF	333.4 d
411	249Bk	7.790805	2.851×107	β−, α, SF	330 d
412	49V	9.050040	2.843×107	β+	329.1 d
413	54Mn	9.100131	2.697×107	β+, β−	312.2 d
414	119m1Sn		2.534×107	IT	293.1 d
415	144Ce	8.629918	2.462×107	β−	285 d
416	254Es	7.748524	2.382×107	α, β−, SF, β+	275.7 d
417	57Co	9.112454	2.348×107	β+	271.8 d
418	68Ge	9.056327	2.341×107	β+	271 d
419	143Pm	8.651509	2.290×107	β+	265 d
420	110mAg	8.865355	2.158×107	β−, IT	249.8 d
421	65Zn	9.085352	2.105×107	β+	243.6 d
422	153Gd	8.547731	2.077×107	β+	240.4 d
423	102Rh		1.788×107	β+, β-	207 d
424	195Au	8.238353	1.608×107	β+	186.1 d
425	194mIr	8.238025	1.477×107	β−	170.9 d
426	184mRe	8.310670	1.460×107	IT, β+	169 d
427	242Cm	7.844860	1.407×107	α, SF	162.8 d
428	45Ca	8.978261	1.405×107	β−	162.6 d
429	177mLu	8.361829	1.386×107	β−, IT	160.4 d
430	121mTe	8.800749	1.331×107	IT, β+	154.1 d
431	159Dy	8.506378	1.248×107	β+	144.4 d
432	174m1Lu		1.227×107	IT, EC	142 d
433	210Po	8.147295	1.196×107	α	138.4 d
434	139Ce	8.696881	1.189×107	β+	137.6 d
435	123Sn	8.785311	1.116×107	β−	129.2 d
436	170Tm	8.423096	1.111×107	β−, β+	128.6 d
437	151Gd	8.562685	1.071×107	β+, α	124 d
438	181W	8.337924	1.047×107	β+	121.2 d
439	75Se	9.033581	1.035×107	β+	119.8 d
440	123mTe		1.03×107	IT	119.2 d
441	113Sn	8.853035	9.944×106	β+	115.1 d
442	182Ta	8.326456	9.887×106	β−	114.4 d
443	127mTe	8.765759	9.418×106	IT	109 d
444	88Y	9.029272	9.212×106	β+	106.6 d
445	257Fm	7.726619	8.683×106	α, SF	100.5 d
446	185Os	8.302730	8.087×106	β+	93.6 d
447	168Tm	8.436316	8.044×106	β+, β−	93.1 d
448	149Eu	8.584395	8.044×106	β+	93.1 d
449	97mTc		7.862×106	IT	91 d
450	35S	8.895510	7.561×106	β−	87.51 d
451	83Rb	9.024038	7.448×106	β+	86.2 d
452	46Sc	8.979091	7.239×106	β−	83.78 d
453	88Zr	9.021589	7.206×106	β+	83.4 d
454	73As	9.043341	6.938×106	β+	80.3 d
455	56Co	9.072031	6.673×106	β+	77.23 d
456	185W	8.305866	6.489×106	β−	75.1 d
457	192Ir		6.379×106	β−,ε	73.827 d
458	160Tb	8.495346	6.247×106	β−	72.3 d
459	58Co	9.103153	6.122×106	β+	70.86 d
460	183Re	8.321661	6.048×106	β+	70 d
461	175Hf	8.382665	6.048×106	β+	70 d
462	188W	8.277003	6.029×106	β−	69.78 d
463	85Sr	9.025480	5.602×106	β+	64.84 d
464	95Zr	8.972989	5.532×106	β−	64.03 d
465	95mTc	8.976359	5.270×106	β+, IT	61 d
466	254Cf	7.751087	5.227×106	SF, α	60.5 d
467	124Sb	8.777943	5.194×106	β−	60.12 d
468	125I	8.782019	5.132×106	β+	59.4 d
469	91Y	9.020174	5.055×106	β−	58.51 d
470	125mTe		4.959×106	IT	57.4 d
471	148Eu	8.586882	4.709×106	β+, α	54.5 d
472	7Be	5.818470	4.598×106	β+	53.22 d
473	258Md	7.715948	4.450×106	α, SF	51.5 d
474	89Sr	9.039969	4.369×106	β−	50.57 d
475	114mIn	8.846608	4.278×106	IT, β+	49.51 d
476	146Gd	8.592512	4.171×106	β+	48.28 d
477	203Hg	8.195806	4.026×106	β−	46.6 d
478	237Pu	7.881060	3.905×106	β+, α	45.2 d
479	115mCd	8.835754	3.850×106	β−	44.56 d
480	59Fe	9.099516	3.844×106	β−	44.49 d
481	181Hf	8.333272	3.662×106	β−	42.38 d
482	148mPm	8.589800	3.567×106	β−, IT	41.28 d
483	105Ag	8.900547	3.567×106	β+	41.28 d
484	255Es	7.741567	3.439×106	β−, α, SF	39.8 d
485	103Ru	8.918500	3.392×106	β−	39.26 d
486	127Xe	8.766768	3.145×106	β+	36.4 d
487	95Nb	8.984821	3.023×106	β−	34.99 d
488	37Ar	8.907752	3.020×106	β+	34.95 d
489	129mTe	8.744953	2.903×106	IT, β−	33.6 d
490	84Rb	9.020732	2.860×106	β+, β−	33.1 d
491	241Cm	7.848492	2.834×106	β+, α	32.8 d
492	141Ce	8.677286	2.809×106	β−	32.51 d
493	169Yb	8.428546	2.767×106	β+	32.03 d
494	260Md	7.699789	2.748×106	SF, α, β+, β−	31.81 d
495	51Cr	9.080127	2.393×106	β+	27.7 d
496	240Cm	7.855805	2.333×106	α, β+, SF	27 d
497	233Pa	7.910426	2.331×106	β−	26.98 d
498	82Sr	8.998254	2.208×106	β+	25.56 d
499	33P	8.869434	2.189×106	β−	25.34 d
500	179m2Hf		2.164×106		25.05 d
501	234Th	7.897763	2.082×106	β−	24.1 d
502	147Eu	8.598879	2.082×106	β+, α	24.1 d
503	178W	8.354563	1.866×106	β+	21.6 d
504	230U	7.933871	1.797×106	α, SF	20.8 d
505	253Es	7.759019	1.769×106	α, SF	20.47 d
506	121Te		1.656×106	ε	19.17 d
507	227Th	7.957644	1.614×106	α	18.68 d
508	86Rb	9.033502	1.611×106	β−, β+	18.65 d
509	253Cf	7.757885	1.539×106	β−, α	17.81 d
510	74As	9.028895	1.535×106	β+, β−	17.77 d
511	230Pa	7.931436	1.503×106	β+, β−, α	17.40 d
512	103Pd	8.920638	1.468×106	β+	16.99 d
513	99Rh	8.935711	1.391×106	β+	16.1 d
514	48V	8.997890	1.380×106	β+	15.97 d
515	191Os	8.261870	1.331×106	β−	15.41 d
516	205Bi	8.174069	1.323×106	β+	15.31 d
517	156Eu	8.520642	1.312×106	β−	15.19 d
518	225Ra	7.973576	1.287×106	β−	14.9 d
519	32P	8.830865	1.232×106	β−	14.26 d
520	117mSn		1.21×106	IT	14 d
521	143Pr	8.652258	1.172×106	β−	13.56 d
522	189Ir	8.274783	1.140×106	β+	13.19 d
523	136Cs	8.706171	1.127×106	β−	13.04 d
524	126I	8.769026	1.117×106	β+, β−	12.93 d
525	140Ba	8.666120	1.102×106	β−	12.75 d
526	126Sb	8.757042	1.067×106	β−	12.35 d
527	202Tl	8.199956	1.057×106	β+	12.23 d
528	131mXe		1.023×106	IT	11.84 d
529	190Ir	8.264755	1.018×106	β+	11.78 d
530	131Ba	8.733037	9.936×105	β+	11.5 d
531	223Ra	7.994042	9.876×105	α	11.43 d
532	71Ge	9.055943	9.876×105	β+	11.43 d
533	147Nd	8.602973	9.487×105	β−	10.98 d
534	246Pu	7.805494	9.366×105	β−	10.84 d
535	193mIr		9.098×105	IT	10.53 d
536	188Pt	8.272514	8.813×105	β+, α	10.2 d
537	225Ac	7.975159	8.640×105	α	10 d
538	131Cs	8.743541	8.371×105	β+	9.69 d
539	125Sn	8.758515	8.329×105	β−	9.64 d
540	169Er	8.431852	8.115×105	β−	9.39 d
541	149Gd	8.575576	8.018×105	β+, α	9.28 d
542	167Tm	8.445866	7.992×105	β+	9.25 d
543	129mXe		7.672×105	IT	8.88 d
544	206Po	8.159590	7.603×105	β+, α	8.80 d
545	72Se	9.014300	7.258×105	β+	8.40 d
546	106mAg	8.890639	7.154×105	β+	8.28 d
547	171Lu	8.409532	7.119×105	β+	8.24 d
548	131I	8.738842	6.930×105	β−	8.02 d
549	257Es	7.723468	6.653×105	β−, SF	7.7 d
550	111Ag	8.866111	6.437×105	β−	7.45 d
551	161Tb	8.490383	5.967×105	β−	6.91 d
552	237U	7.879800	5.832×105	β−
553	172Lu	8.401217	5.789×105	β+
538	132Cs	8.731599	5.599×105	β+, β−
539	206Bi	8.168551	5.394×105	β+
540	196Au	8.230205	5.328×105	β+, β−
541	56Ni	9.033899	5.249×105	β+
542	118Te	8.814726	5.184×105	β+
543	145Eu	8.609245	5.124×105	β+
544	120mSb	8.808194	4.977×105	β+
545	52Mn	9.046431	4.831×105	β+
546	156Tb	8.520667	4.622×105	β+
547	155Tb	8.531031	4.596×105	β+
548	133Xe	8.730302	4.530×105	β−
549	183Ta	8.318847	4.406×105	β−
550	245Bk	7.819020	4.268×105	β+, α
551	119mTe	8.801773	4.061×105	β+, IT
552	146Eu	8.599560	3.983×105	β+
553	47Ca	8.972181	3.919×105	β−
554	234Np	7.900571	3.802×105	β+
555	96Tc	8.965255	3.698×105	β+
556	231U	7.924977	3.629×105	β+, α
557	175Yb	8.383902	3.616×105	β−
558	124I	8.775884	3.608×105	β+
559	127Sb	8.754005	3.326×105	β−
560	222Rn	7.997573	3.304×105	α
561	224Ra	7.987277	3.138×105	α
562	100Pd	8.923587	3.136×105	β+
563	166Dy	8.448376	2.938×105	β−
564	140Nd	8.673113	2.912×105	β+
565	47Sc	9.014564	2.894×105	β−
566	87Y	9.025565	2.873×105	β+
567	89Zr	9.024912	2.823×105	β+
568	67Ga	9.069532	2.819×105	β+
569	132Te	8.716646	2.768×105	β−
570	134Ce	8.704432	2.730×105	β+
571	199Au	8.217534	2.712×105	β−
572	201Tl	8.206561	2.625×105	β+
573	253Fm	7.757691	2.592×105	β+, α
574	191Pt	8.258228	2.473×105	β+
575	111In	8.867688	2.423×105	β+
576	97Ru	8.959080	2.411×105	β+
577	99Mo	8.939669	2.375×105	β−
578	122Sb	8.795346	2.353×105	β−, β+
579	71As	9.027581	2.350×105	β+
580	198Au	8.220732	2.329×105	β−
581	197Hg	8.226358	2.309×105	β+
582	90Y	9.032294	2.306×105	β−
583	182Re	8.321053	2.304×105	β+
584	172Tm	8.404932	2.290×105	β−
585	67Cu	9.076086	2.226×105	β−
586	44mSc	8.924627	2.110×105	IT, β+
587	128Ba	8.738523	2.100×105	β+
588	77Br	9.022431	2.053×105	β+
589	166Yb	8.442340	2.041×105	β+
590	177Ta	8.363553	2.036×105	β+
591	239Np	7.864999	2.036×105	β−
592	153Tb	8.537471	2.022×105	β+
593	66Ni	9.071423	1.966×105	β−
594	247Pu	7.791975	1.961×105	β−
595	149Pm	8.581871	1.911×105	β−
596	203Pb	8.193431	1.869×105	β+
597	238Np	7.871931	1.829×105	β−
598	240Am	7.856694	1.829×105	β+, α
599	172Er	8.399752	1.775×105	β−
600	170Lu	8.408445	1.738×105	β+
601	252Cm	7.757439	< 1.728×105	β−
602	72Zn	9.017591	1.674×105	β−
603	153Sm	8.545614	1.666×105	β−
604	202Pt	8.183209	1.584×105	β−
605	48Sc	8.998327	1.572×105	β−
606	246Bk	7.811287	1.555×105	β+, α
607	195mHg	8.229399	1.498×105	IT, β+
608	188Ir	8.275200	1.494×105	β+
609	140La	8.673620	1.450×105	β−
610	69Ge	9.043800	1.406×105	β+
611	77As	9.031283	1.398×105	β−
612	119Sb	8.823235	1.375×105	β+
613	147Gd	8.584001	1.370×105	β+
614	194Au	8.237626	1.369×105	β+
615	229Pa	7.940769	1.296×105	β+, α
616	246Cf	7.810792	1.285×105	α, β+, SF
617	57Ni	9.055222	1.282×105	β+
618	105Rh	8.907956	1.273×105	β−
619	82Br	9.016407	1.270×105	β−
620	79Kr	9.013644	1.261×105	β+
621	137mCe	8.696327	1.238×105	IT, β+
622	169Lu	8.414978	1.226×105	β+
623	143Ce	8.642041	1.189×105	β−
624	251Es	7.774467	1.188×105	β+, α
625	83Sr	8.996568	1.167×105	β+
626	129Cs	8.749622	1.154×105	β+
627	268Db	7.635133	1.152×105	SF
628	232Pa	7.916379	1.132×105	β−, β+
629	193Os	8.244348	1.084×105	β−
630	165Tm	8.452758	1.082×105	β+
631	131mTe	8.720392	1.080×105	β−, IT
632	226Ac	7.963761	1.057×105	β−, β+, α
633	160Er	8.484190	1.029×105	β+
634	151Pm	8.557387	1.022×105	β−
635	76As	9.022505	9.454×104	β−
636	200Tl	8.206567	9.396×104	β+
637	72As	9.018966	9.360×104	β+
638	231Th	7.924932	9.187×104	β−, α
639	252Fm	7.766498	9.140×104	α, SF
640	189Re	8.272269	8.748×104	β−	1.01 d

Radionuclides with half-lives of 1.0 hour to 24 hours

no	nuclide	energy	half-life	decay mode
641	187W	8.284722	8.539×104	β−
642	173Hf	8.391617	8.496×104	β+
643	96Nb	8.963036	8.406×104	β−
644	154mTb	8.526912	8.172×104	β+, IT
645	43K	8.922327	8.028×104	β−
646	182Os	8.316432	7.956×104	β+
647	228Pa	7.944468	7.920×104	β+, α
648	48Cr	8.963390	7.762×104	β+
649	200Pb	8.202542	7.740×104	β+
650	112Pd	8.842185	7.571×104	β−
651	28Mg	8.607706	7.529×104	β−
652	100Rh	8.927167	7.488×104	β+
653	133I	8.717094	7.488×104	β−
654	122Xe	8.770959	7.236×104	β+
655	255Fm	7.742704	7.225×104	α, SF
656	181Re	8.328294	7.164×104	β+
657	197Pt	8.225756	7.161×104	β−
658	135La	8.713179	7.020×104	β+
659	142Pr	8.661417	6.883×104	β−, β+
660	200mAu	8.202877	6.732×104	β−, IT
661	159Gd	8.502576	6.652×104	β−
662	135Ce	8.698179	6.372×104	β+
663	193Au	8.244353	6.354×104	β+
664	151Tb	8.545692	6.339×104	β+, α
665	55Co	9.053647	6.311×104	β+
666	152Tb	8.536591	6.300×104	β+, α
667	188Re	8.278860	6.121×104	β−
668	125Xe	8.768864	6.084×104	β+
669	97Zr	8.926451	6.028×104	β−
670	186Ir	8.281935	5.990×104	β+
671	86Zr	8.975979	5.940×104	β+
672	76Br	8.996183	5.832×104	β+
673	170Hf	8.402210	5.764×104	β+
674	157Eu	8.513792	5.465×104	β−
675	24Na	8.422082	5.382×104	β−
676	76Kr	8.979406	5.328×104	β+
677	86Y	8.993234	5.306×104	β+
678	211Rn	8.112825	5.256×104	β+, α
679	90Nb	8.989727	5.256×104	β+
680	185Ir	8.289382	5.184×104	β+
681	240U	7.851682	5.076×104	β−
682	72Ga	9.023958	5.074×104	β−
683	69mZn	9.056536	4.954×104	IT, β−
684	109Pd	8.875061	4.932×104	β−
685	123I	8.786311	4.760×104	β+
686	265Rf	7.661139	≈ 4.680×104	α
687	183Os	8.309907	4.680×104	β+
688	64Cu	9.093581	4.572×104	β+, β−
689	200Pt	8.204342	4.500×104	β−
690	130I	8.740035	4.450×104	β−
691	42K	8.905175	4.436×104	β−
692	171Hf	8.395480	4.356×104	β+
693	239Am	7.864666	4.284×104	β+, α
694	193mHg	8.231483	4.248×104	β+, IT
695	203Bi	8.177436	4.234×104	β+
696	77Ge	8.996185	4.068×104	β−
697	204Bi	8.172651	4.039×104	β+
698	266Lr		3.960×104	SF
699	189Pt	8.264359	3.913×104	β+
700	212Pb	8.106928	3.830×104	β−
701	175Ta	8.370813	3.780×104	β+
702	245Pu	7.813752	3.780×104	β−
703	187Ir	8.283713	3.780×104	β+
704	165Er	8.462406	3.730×104	β+
705	93Y	8.976951	3.665×104	β−
706	244Am	7.825914	3.636×104	β−
707	266Rf	7.658170	≈ 3.600×104	α, SF
708	155Dy	8.517521	3.564×104	β+
709	91Sr	8.990503	3.467×104	β−
710	66Ga	9.036843	3.416×104	β+
711	156Sm	8.516007	3.384×104	β−
712	201Pb	8.196989	3.359×104	β+
713	62Zn	9.057957	3.307×104	β+
714	135Xe	8.711453	3.290×104	β−
715	128Sb	8.732343	3.244×104	β−
716	234Pu	7.898892	3.168×104	β+, α
717	184Ta	8.304154	3.132×104	β−
718	250Es	7.778407	3.096×104	β+, α
719	101Pd	8.917149	3.049×104	β+
720	52Fe	9.000789	2.979×104	β+
721	173Tm	8.396524	2.966×104	β−
722	157Dy	8.513544	2.930×104	β+
723	210At	8.128337	2.916×104	β+, α
724	176Ta	8.363202	2.912×104	β+
725	166Tm	8.444183	2.772×104	β+
726	256mEs	7.730742	2.736×104	β−
727	171Er	8.408901	2.706×104	β−
728	199Tl	8.212333	2.671×104	β+
729	211At	8.126527	2.597×104	β+, α
730	73Se	9.005821	2.574×104	β+
731	234Pa	7.898930	2.412×104	β−
732	135I	8.691994	2.365×104	β−
733	107Cd	8.884271	2.340×104	β+
734	82mRb	8.999608	2.330×104	β+, IT
735	153Dy	8.523288	2.304×104	β+, α
736	127Cs	8.750383	2.250×104	β+
737	228Ac	7.944591	2.214×104	β−
738	145Pr	8.620514	2.154×104	β−
739	207Po	8.154158	2.088×104	β+, α
740	90Mo	8.962072	2.002×104	β+
741	257Md	7.725040	1.987×104	β+, α, SF
742	111mPd	8.844589	1.980×104	IT, β−
743	139mNd	8.659529	1.980×104	β+, IT
744	209At	8.132954	1.948×104	β+, α
745	113Ag	8.841531	1.933×104	β−
746	198Tl	8.210166	1.908×104	β+
747	251Fm	7.768590	1.908×104	β+, α
748	138Nd	8.665661	1.814×104	β+
749	160mHo	8.485877	1.807×104	IT, β+
750	118mSb	8.814963	1.800×104	β+
751	243Pu	7.833648	1.784×104	β−
752	192Au	8.242036	1.778×104	β+
753	110In	8.857464	1.764×104	β+
754	133mCe	8.690771	1.764×104	β+
755	94Tc	8.966583	1.758×104	β+
756	85mY	8.986880	1.750×104	β+, IT
757	73Ga	9.026112	1.750×104	β−
758	192Hg	8.238051	1.746×104	β+
759	132La	8.705721	1.728×104	β+
760	179Lu	8.345428	1.652×104	β−
761	81Rb	9.002871	1.645×104	β+
762	243Bk	7.829801	1.620×104	β+, α
763	105Ru	8.889689	1.598×104	β−
764	80mBr	9.018872	1.591×104	IT
765	139Pr	8.681565	1.588×104	β+
766	129Sb	8.727358	1.584×104	β−
767	244Bk	7.822491	1.566×104	β+, α
768	109In	8.864805	1.512×104	β+
769	184Hf	8.296871	1.483×104	β−
770	149Tb	8.551166	1.482×104	β+, α
771	110Sn	8.851727	1.480×104	β+
772	262Lr	7.681556	1.440×104	SF, β+, α
773	71mZn	9.017370	1.426×104	β−, IT
774	141La	8.659540	1.411×104	β−
775	133La	8.714109	1.408×104	β+
776	43Sc	8.912907	1.401×104	β+
777	195mIr	8.233326	1.368×104	β−, IT
778	92Y	8.993208	1.274×104	β−
779	204Po	8.161200	1.271×104	β+, α
780	132Ce	8.696131	1.264×104	β+
781	150Tb	8.545394	1.253×104	β+, α
782	117mCd	8.808840	1.210×104	β−
783	61Cu	9.087452	1.200×104	β+
784	209Pb	8.155607	1.171×104	β−
785	254Fm	7.752808	1.166×104	α, SF
786	250Bk	7.779523	1.156×104	β−
787	161Er	8.476352	1.156×104	β+
788	190mRe	8.257433	1.152×104	β−, IT
789	191Au	8.248343	1.145×104	β+
790	173Ta	8.374218	1.130×104	β+
791	112Ag	8.844756	1.127×104	β−
792	247Cf	7.803566	1.120×104	β+, α
793	184Ir	8.286599	1.112×104	β+
794	45Ti	8.938121	1.109×104	β+
795	167Ho	8.444304	1.081×104	β−
796	269Db	7.630064	1.080×104	α, SF
797	239Cm	7.857143	1.044×104	β+, α
798	197Tl	8.215190	1.022×104	β+
799	88Kr	8.976918	1.022×104	β−
800	38S	8.778196	1.022×104	β−
801	117Sb	8.828977	1.008×104	β+
802	224Ac	7.980993	1.001×104	β+, α, β−
803	93Tc	8.970274	9.900×103	β+
804	150Pm	8.562014	9.648×103	β−
805	92Sr	8.972067	9.576×103	β−
806	256Fm	7.737398	9.456×103	SF, α
807	31Si	8.811618	9.438×103	β−
808	56Mn	9.087572	9.284×103	β−
809	65Ni	9.073267	9.062×103	β−
810	176W	8.359055	9.000×103	β+
811	116Te	8.806414	8.964×103	β+
812	141Nd	8.668476	8.964×103	β+
813	161Ho	8.488737	8.928×103	β+
814	210Rn	8.117032	8.640×103	α, β+
815	198Pb	8.202893	8.640×103	β+
816	238Cm	7.863764	8.640×103	β+, α
817	83Br	9.023243	8.640×103	β−
818	152Dy	8.532670	8.568×103	β+, α
819	178mTa	8.355075	8.496×103	β+
820	187Pt	8.267638	8.460×103	β+
821	165Dy	8.456891	8.402×103	β−
822	267Rf	7.647357	8.280×103	SF
823	132I	8.720570	8.262×103	β−
824	158Er	8.484619	8.244×103	β+
825	66Ge	9.004964	8.136×103	β+
826	129Ba	8.730746	8.028×103	β+
827	177W	8.352118	7.920×103	β+
828	106mRh	8.884761	7.860×103	β−
829	138mPr	8.671088	7.632×103	β+
830	121I	8.784443	7.632×103	β+
831	127Sn	8.728800	7.560×103	β−
832	123Xe	8.764409	7.488×103	β+
833	186Pt	8.274897	7.488×103	β+, α
834	245Am	7.818674	7.380×103	β−
835	89Nb	8.977507	7.308×103	β+
836	117mIn	8.828849	6.972×103	β−, IT
837	177Yb	8.359401	6.880×103	β−
838	196Tl	8.211618	6.624×103	β+
839	18F	8.022789	6.585×103	β+
840	41Ar	8.877852	6.577×103	β−
841	163Tm	8.456205	6.516×103	β+
842	239Pa	7.848148	6.480×103	β−
843	201Bi	8.177875	6.480×103	β+, α
844	207At	8.135303	6.480×103	β+, α
845	224Rn	7.971327	6.420×103	β−
846	80Sr	8.950177	6.378×103	β+
847	181Os	8.311935	6.300×103	β+
848	205Po	8.156737	6.264×103	β+, α
849	149Nd	8.570529	6.221×103	β−
850	202Bi	8.173966	6.192×103	β+, α
851	249Es	7.785464	6.132×103	β+, α
852	147Tb	8.552634	6.120×103	β+
853	87Zr	8.983373	6.048×103	β+
854	126Ba	8.727439	6.000×103	β+
855	61Co	9.102449	5.940×103	β−
856	95Ru	8.949749	5.915×103	β+
857	238Am	7.867882	5.880×103	β+, α
858	208At	8.131376	5.868×103	β+, α
859	75Br	8.993181	5.802×103	β+
860	259Md	7.709860	5.760×103	SF, α
861	230Ra	7.921249	5.580×103	β−
862	142La	8.634954	5.466×103	β−
863	78As	9.004879	5.442×103	β−
864	199Pb	8.198111	5.400×103	β+
865	78Ge	8.992635	5.280×103	β−
866	255Cf	7.738739	5.100×103	β−
867	196mIr	8.219440	5.040×103	β−, IT
868	139Ba	8.682217	4.984×103	β−
869	75Ge	9.029413	4.967×103	β−
870	120I	8.769577	4.896×103	β+
871	256Md	7.729062	4.620×103	β+, α, SF
872	137Pr	8.678459	4.608×103	β+
873	87Kr	8.999022	4.578×103	β−
874	164Yb	8.443419	4.548×103	β+
875	163Er	8.471168	4.500×103	β+
876	77Kr	8.982618	4.464×103	β+
877	178Yb	8.350530	4.440×103	β−
878	267Db	7.644361	4.380×103	SF
879	237Am	7.874830	4.380×103	β+, α
880	142Sm	8.627616	4.349×103	β+
881	97Nb	8.953864	4.326×103	β−
882	185Pt	8.269598	4.254×103	β+
883	195Tl	8.215712	4.176×103	β+
884	104Ag	8.889702	4.152×103	β+
885	174Ta	8.368684	4.104×103	β+
886	68Ga	9.057888	4.063×103	β+
887	162mHo	8.478371	4.020×103	IT, β+
888	103Ag	8.894541	3.942×103	β+
889	249Cm	7.787191	3.849×103	β−
890	183Hf	8.307885	3.841×103	β−
891	229Ac	7.937048	3.762×103	β−
892	117Te	8.798652	3.720×103	β+
893	240Np	7.853348	3.714×103	β−
894	212Bi	8.109617	3.633×103	β−, α
895	116mSb	8.816483	3.618×103	β+
896	148Tb	8.547949	3.600×103	β+

Naturally occurring isotopes with half-lives below one hour

This list is incomplete; you can help by expanding it.

nuclide	half-life	decay mode
211Pb	36.1 min	β−
214Pb	26.8 min	β−
223Fr	22 min	β−, α
214Bi	19.9 min	β−, α
206Hg	8.15 min	β−
215Bi	7.6 min	β−
221Fr	4.8 min	α
207Tl	4.77 min	β−
206Tl	4.2 min	β−
218Po	3.10 min	α, β−
208Tl	3.053 min	β−
211Bi	2.14 min	α, β−
210Tl	1.3 min	β−
234mPa	1.17 min	β−, I
219At	56 s	α, β−
220Rn	55.6 s	α
219Rn	3.96 s	α
218At	1.5 s	α, β−
211Po	0.516 s	α
216Po	0.145 s	α
218Rn	35 ms	α
215Po	1.781 ms	α
214Po	164.3 µs	α
215At	0.1 ms	α
212Po	299 ns	α

See also

• Primordial nuclide
• Table of nuclides
• Isotope geochemistry
• Radionuclide
• Mononuclidic element
• Monoisotopic element
• Stable isotope
• List of elements by stability of isotopes
• List of radioactive isotopes by half-life

Sources

Almost all data are taken from reference. For more recent updates, see reference. These sources do not indicate whether certain heavy isotopes starting from Lr, Rf, Db... (etc.) were produced, observed, or only predicted from estimated data.

External links

• Experimental atomic mass data compiled Nov. 2003
• J. Magill, G. Pfennig, J. Galy "Karlsruher Nuclide Chart", 7th edition 2006, revised printing Nov. 2007
• The LIVEChart of Nuclides – IAEA with dynamic half-life filtering
• Nice Overview picture for energy of nuclides
• National Isotope Development Center Reference information on isotopes, and coordination and management of isotope production, availability, and distribution
• Isotope Development & Production for Research and Applications (IDPRA) U.S. Department of Energy program for isotope production and production research and development