List of isotopes / from ordinal number 101
The list of isotopes is the overview page for easy access to all elements. The structure is also explained there and the legend for the table can also be found there. Decay energies were recalculated with the given masses and the mass-energy equivalent of .
101 Mendelevium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
245 billion | 0.35 s | (7/2) | α | ||
245m1 Md | 0.90 ms | (1 / 2−) | |||
246 Md | 1.0 s | α | |||
247 Md | 1.12 s | 8.82 (α) | α = 80, SF = 20 | ||
248 Md | 7 s | 5.25 (ε), 8.7 (α) | ε = 80, α = 20, SF <0.05 | ||
249 Md | 24 s | 3.7 (ε), 8.46 (α) | ε = 80, α = 20 | ||
250 billion | 52 p | 4.6 (ε), 8.31 (α) | ε = 93, α = 7, εSF = 0.02 | ||
251 billion | 4.0 min | 3.07 (ε), 8.02 (α) | ε> 90, α <10 | ||
252 billion | 2.3 min | 3.89 (ε) | ε> 50, α <50 | ||
253 billion | 6 min | 1.96 (εβ + ) | εβ + | ||
254 billion | 10 min | 2.68 | ε <100 | ||
254m1 Md | 28 min | ε <100 | |||
255 billion | 27 min | 1.043 (ε), 7.907 (α) | (7 / 2−) | ε = 92, α = 8, SF <1.4 | |
256 billion | 78.1 min | 2.13 (ε), 7.897 (α) | (0−, 1−) | ε = 90.7, α = 9.3, SF <2.8 | |
257 Md | 5.52 h | 0.406 (ε), 7.271 (α) | (7 / 2−) | ε = 85, α = 15, SF <1 | |
258 billion | 51.5 d | 7.271 (α), 1.23 (ε) | (8−) | α ≈ 100, SF <0.003, β - <0.003, ε <0.003 | |
258m1 Md | 57.0 min | 1.23 (ε), 7.271 (α) | (1−) | ε> 70, SF <30, α <1.2, β - <30 | |
259 Md | 96 min | 7.1 (α) | (7 / 2−) | SF ≈ 100, α <1.3 | |
260 billion | 27.8 d | 7.0 (α), 1.0 (β - ) | SF> 73, α <25, β - <10 |
102 Nobelium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
250 No. | 0.25 ms | 9.0 (α) | 0+ | SF ≈ 100, α ≈ 0.05 | |
251 No. | 0.8 s | 8.89 (α), 3.78 (ε) | α ≈ 100, ε ≈ 1, SF <8 | ||
252 no | 2.30 s | 8.549 (α) | 0+ | α = 73.1, SF = 26.9 | |
253 no | 1.7 min | 8.44 (α), 3.2 (ε) | (9 / 2−) | α ≈ 80, ε ≈ 20 | |
254 No. | 55 s | 8.226 (α), 1.14 (ε) | 0+ | α ≈ 100, ε = 10, SF = 0.17 | |
254m1 No. | 0.28 s | 0.50 (IT) | IT> 80 | ||
255 No. | 3.1 min | 8.445 (α), 2.012 (ε) | (1/2 +) | α = 61.4, ε = 38.6 | |
256 No. | 2.91 s | 8.581 (α) | 0+ | α ≈ 100, SF = 0.53 | |
257 no | 25 s | 8.45 (α) | (7/2 +) | α ≈ 100 | |
258 No. | 1.2 ms | 8.2 (α) | 0+ | SF ≈ 100, α ≈ 1 · 10 −3 | |
259 no | 58 min | 7.91 (α), 0.5 (ε) | (9/2 +) | α ≈ 100, ε = 25, SF <10 | |
260 No. | 106 ms | 0+ | SF | ||
261 No. | |||||
262 No. | 5 ms | 0+ | SF =? |
103 Lawrencium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
252 Lr | 0.4 s | 9.15 | α ≈ 100 | ||
253 Lr | 0.6 s | 8.99 (α) | α> 80, SF <20 | ||
253m1 Lr | 1.5 s | 8.99 (α), 4.3 (ε) | α = 98, ε ≈ 1, SF <1 | ||
254 Lr | 13 s | 8.75 (α), 5.2 (ε) | α = 78, ε = 22, SF <0.16 | ||
255 Lr | 22 s | 8.62 (α), 3.24 (ε) | α = 85, ε <30, SF <0.10 | ||
256 Lr | 28 p | 8.88 (α), 4.19 (ε) | α> 80, ε <20, SF <0.026 | ||
257 Lr | 0.646 s | 9.01 (α) | (9/2 +) | α ≈ 100, SF <6.5 · 10 −4 | |
258 Lr | 3.9 s | 8.90 (α), 3.38 (ε) | α> 95, ε <5, SF <5 | ||
259 Lr | 6.3 s | 8.67 (α), 1.81 (ε) | α = 77, SF = 23, ε <0.5 | ||
260 Lr | 180 s | 8.31 (α), 2.74 (ε) | α = 75, ε = 25 | ||
261 Lr | 39 min | SF <100 | |||
262 Lr | 216 min | 2.1 (ε) | ε> 10, SF <10 |
104 rutherfordium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
253 Rf | 1.8 s | 9.5 (α) | SF ≈ 50, α ≈ 50 | ||
253m1 Rf | 48 µs | SF ≈ 100 | |||
254 Rf | 0.5 ms | 9.3 (α) | 0+ | SF = 100, α ≈ 0.3 | |
254m1 Rf | 22.3 µs | SF ≈ 100 | |||
255 Rf | 1.5 s | 9.3 (α) | (9 / 2−) | SF = 52, α = 48 | |
256 Rf | 6.7 ms | 8.952 (α) | 0+ | SF = 97.8 , α = 2.2 | |
257 Rf | 4.7 s | 9.25 (α), 3.4 (ε) | (7/2 +) | α ≈ 79.6, ε = 18, SF = 2.4 | |
258 Rf | 12 ms | 9.25 (α) | 0+ | SF ≈ 87, α ≈ 13 | |
259 Rf | 3.1 s | 9.11 (α) | α ≈ 93, SF = 7, ε ≈ 0.3 | ||
260 Rf | 20.1 ms | 9.00 (α), 2.45 (ε) | 0+ | SF | |
261 Rf | 4.2 s | 8.81 (α), 1.8 (ε) | α> 80, SF <10, ε <10 | ||
261m1 Rf | 78 p | α ≈ 100 | |||
262 Rf | 2.1 s | 0+ | SF | ||
262m1 Rf | 47 ms | (2+) | |||
263 Rf | 15 minutes | SF | |||
267 Rf | 1.3 h | SF | |||
268 Rf | 0+ | SF |
105 Dubnium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
255 Db | 1.6 s | 9.6 (α) | α> 47, SF <53 | ||
256 Db | 2.6 s | 9.5 (α) | SF <40, α ≈ 70, ε ≈ 10 | ||
257 Db | 1.3 s | 9.31 (α), 4.3 (ε) | α = 82, SF = 17, ε = 1 | ||
257m1 Db | 0.8 s | α ≈ 100 | |||
258 Db | 4.4 s | 9.55 (α), 5.5 (ε) | α = 67 , ε = 33 , SF <34 | ||
258m1 Db | 20 s | ε ≈ 100 | |||
259 Db | 0.51 s | α ≈ 100 | |||
260 db | 1.52 s | 9.37 (α), 4.6 (ε) | α> 90.4, SF ≈ 9.6, ε <2.5 | ||
261 Db | 1.8 s | 9.27 (α) | α> 50, SF <50 | ||
262 Db | 34 p | 9.21 (α), 4.0 (ε) | α ≈ 64, SF ≈ 33, ε ≈ 3 | ||
263 Db | 27 p | 9.03 (α) | SF = 57, α = 43 | ||
267 Db | 1.2 h | SF ≈ 100 | |||
268 Db | 16 h | SF ≈ 100 |
106 seaborgium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
258 Sg | 2.9 ms | 0+ | SF | ||
259 Sg | 0.48 s | 9.87 (α) | (1/2 +) | α = 90, SF <20 | |
260 Sg | 3.6 ms | 9.92 (α) | 0+ | α = 50 , SF = 50 | |
261 Sg | 0.23 s | 9.81 (α) | α = 95, SF <10 | ||
262 Sg | 6.9 ms | 0+ | SF | ||
263 Sg | 0.8 s | 9.59 (α) | SF ≈ 70, α ≈ 30 | ||
263m1 Sg | 0.31 s | (9/2 +) | α ≈ 100 | ||
264 Sg | 0+ | ||||
265 Sg | 10 s | 9.2 (α) | (1/2 +) | α> 50, SF <50 | |
266 Sg | 21 s | 9.1 (α) | 0+ | α = 50, SF = 50 | |
271 Sg | 2.4 min | α> 50, SF <50 |
107 Bohrium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
260 operating hours | 10.0 | α =? | |||
261 operating hours | 11.8 ms | 10.56 (α) | α = 95, SF <10 | ||
262 hours | 102 ms | 10.42 (α) | α> 80, SF <20 | ||
262m1 Bh | 8.0 ms | α> 70, SF <30 | |||
263 hours | |||||
264 operating hours | 0.44 s | α | |||
265 operating hours | 0.94 s | 9.24 ± 0.05 (α) | α | ||
266 operating hours | 1.7 s | α | |||
267 hours | 17 s | α | |||
271 hours | α | ||||
272 hours | 9.8 s | α |
108 Hassium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
263 Hs | 1 ms | 10.73 (α), 5.18 (ε) | 7/2 + | α ≈ 100, SF | 263.128480 |
264 Hs | ≈0.8 ms | 10.59 (α), 3.51 (ε) | 0+ | α ≈ 50, SF ≈ 50 | 264.128360 |
265 Hs | 2 ms | 10.47 (α) | (9/2 +) | α ≈ 100, SF ≤ 1 | 265.129792 |
265m1 Hs | 0.75 ms | (1/2 +) | α ≈ 100, SF ≤ 1 | ||
266 Hs | 2.3 ms | 10.346 (α) | 0+ | α ≈ 100, SF ≤ 1 | 266.130050 |
267 Hs | 52 ms | 10.038 (α) | (9/2 +) | α ≥ 80, SF <20 | 267.131670 |
267m Hs | 800 ms | α | |||
268 Hs | 2 s | 9.897 (α) | 0+ | α ≈ 100, SF> 0 | 268.13216 |
269 Hs | 9.7 s | 9.340 (α) | (3/2 +) | α ≈ 100 | 269.133720 |
270 ms | 3.6 s | 9.070 (α) | 0+ | α ≈ 100 | 270.134310 |
271 Hs | 40 s | 9.9 (α) | (3/2 +) | α, SF | 271.13766 |
273 Hs | 0.76 s | 9.70 (α) | α ≈ 100 | 273.141590 | |
275 Hs | 0.15 s | 9.44 (α) | (3/2 +) | α ≈ 100 | 275.146670 |
277 Hs | 3 ms | 9.05 (α) | (3/2 +) | SF ≈ 100 | 277.151900 |
277m Hs | 34 p | SF ≈ 100 | |||
278 Hs | 11 min | ? | 0+ | SF |
109 meitnerium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
266 Mt | 1.7 ms | 11.269 | α ≈ 100, SF> 0 | ||
266m1 Mt | 3.8 ms | α ≈ 100, SF <5.5 | |||
267 Mt | |||||
268 Mt | 0.07 s | 10.73 | (5+, 6+) | α | |
270 Mt | 5.0 ms | 10.35 | α | ||
274 m | 20 s | 10.5 | α | ||
275 mt | 9.7 ms | 10.1 | α | ||
276 Mt | 0.72 s | 9.8 | α | ||
278 Mt | 30 min | 9.1 | α |
110 Darmstadtium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
267 Ds | 2.8 µs | 12.3 | (11 / 2−) | α | |
268 Ds | 0+ | ||||
269 Ds | 0.179 ms | 11.6 | (3/2 +) | α | |
270 Ds | 6.0 ms | 11.2 | 0+ | α = 99.9, SF = 0.1 | |
270m1 Ds | 0.1 ms | α | |||
271 Ds | 56 ms | 10.9 | (3/2 +) | α | |
271m1 Ds | 1.1 ms | (9/2 +) | α | ||
272 Ds | 0+ | ||||
273 Ds | 0.17 ms | 11.4 | (3/2 +) | α | |
273m1 Ds | 120 ms | (13 / 2−) | α | ||
279 Ds | 0.18 s | 9.6 | (7/2 +) | SF ≈ 90, α ≈ 10 | |
280 Ds | 11 s | 9.3 | 0+ | α | |
281 Ds | 9.6 s | 9.0 | (3/2 +) | SF ≈ 100, α> 0 | |
282 Ds | 1.1 min | 0+ | α |
111 Roentgenium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
272 Rg | 3.8 ms | 11.44 | (5+, 6+) | α | |
274 Rg | 6.4 ms | 11.6 | α | ||
278 Rg | 4.2 ms | 10.7 | α ≈ 100, SF> 0 | ||
279 Rg | 170 ms | 10.5 | α | ||
280 Rg | 3.6 s | 10.0 | α | ||
281 Rg | 1 min | SF | |||
282 Rg | 4 min | 9.4 | α, SF |
112 Copernicium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
277 cn | 0.69 ms | 11.62 | (3/2 +) | α ≈ 100, SF> 0 | |
278 cn | 10 ms | 11.38 | 0+ | α, SF | |
279 cn | 100 ms | 10.96 | α, SF | ||
280 cn | 1 s | 10.62 | 0+ | α, SF | |
281 cn | 10 s | 10.29 | (3/2 +) | α, SF | |
282 cn | 0.05 ms | 0+ | SF | ||
283 cn | 4 s | 9.62 (α) | α> 90, SF <10 | ||
284 cn | 101 ms | 0+ | SF | ||
285 cn | 34 p | 8.79 | α |
113 Nihonium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
278 Nh | 0.24 ms | 11.8 | 0 | α | |
282 Nh | 73 ms | 10.0 | α | ||
283 Nh | 100 ms | 10.6 | α | ||
284 Nh | 0.48 s | 10.3 | α | ||
285 Nh | 2 min | 10.0 | α, SF | ||
286 Nh | 5 min | 9.7 | 0 | α ≈ 100, SF> 0 | |
287 Nh | 20 min | 9.3 | α, SF |
114 Flerovium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
285 bottles | 5 s | 11 (α) | (3/2 +) | α, SF | |
286 bottles | 0.16 s | 10.7 (α) | 0+ | α ≈ 40, SF ≈ 60 | |
287 bottles | 0.51 s | 10.44 | (3/2 +) | α | |
288 bottles | 0.8 s | 9.97 | 0+ | α | |
289 bottles | 2.7 s | 9.85 | (3/2 +) | α |
115 Moscovium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
287 Mc | 32 ms | 11.3 (α) | α | ||
288 Mc | 87 ms | 11.0 (α) | α | ||
289 Mc | 220 ms | 10.6 (α) | α ≈ 100, SF> 0 | ||
290 Mc | 16 ms | 10.3 (α) | SF ≈ 100, α> 0 |
116 Livermorium
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
290 Lv | 15 ms | 11.0 | 0+ | α | |
291 Lv | 6.3 ms | 10.89 | α | ||
292 Lv | 18 ms | 10.8 | 0+ | α | |
293 Lv | 53 ms | 10.67 | α |
117 Tenness
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
291 Ts | 10 ms | 11.9 (α) | α, SF | ||
292 Ts | 50 ms | 11.6 (α) | α, SF | ||
293 Ts | 14 ms | 11.03 (α) | α | ||
294 Ts | 78 ms | 10.81 (α) | α, SF |
118 Oganesson
isotope | Half-life | Decay energy (MeV) |
Spin / parity |
Type (s) of decay (%) |
Mass (u) |
---|---|---|---|---|---|
294 Og | 0.89 ms | 11.65 (α) | 0+ | α |
swell
See also list of isotopes # web links