Английская Википедия:Isotopes of actinium

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Шаблон:Short description Шаблон:Infobox actinium isotopes Actinium (89Ac) has no stable isotopes and no characteristic terrestrial isotopic composition, thus a standard atomic weight cannot be given. There are 34 known isotopes, from 203Ac to 236Ac, and 7 isomers. Three isotopes are found in nature, 225Ac, 227Ac and 228Ac, as intermediate decay products of, respectively, 237Np, 235U, and 232Th. 228Ac and 225Ac are extremely rare, so almost all natural actinium is 227Ac.

The most stable isotopes are 227Ac with a half-life of 21.772 years, 225Ac with a half-life of 10.0 days, and 226Ac with a half-life of 29.37 hours. All other isotopes have half-lives under 10 hours, and most under a minute. The shortest-lived known isotope is 217Ac with a half-life of 69 ns.

Purified 227Ac comes into equilibrium with its decay products (227Th and 223Fr) after 185 days.[1]

List of isotopes

Шаблон:Isotopes table |- | 203Ac[2] | | style="text-align:right" | 89 | style="text-align:right" | 114 | | Шаблон:Val | α | 199Fr | (1/2+) | |- |204Ac[3] | | style="text-align:right" | 89 | style="text-align:right" | 115 | | Шаблон:Val | α | 200Fr | | |- |205Ac[4] | | style="text-align:right" | 89 | style="text-align:right" | 116 | | Шаблон:Val[3] | α | 201Fr | 9/2−? | |- | 206Ac | | style="text-align:right" | 89 | style="text-align:right" | 117 | 206.01450(8) | 25(7) ms | α | 202Fr | (3+) | |- | style="text-indent:1em" | 206m1Ac | | colspan="3" style="text-indent:2em" | 80(50) keV | 15(6) ms | α | 202Fr | | |- | style="text-indent:1em" | 206m2Ac | | colspan="3" style="text-indent:2em" | 290(110)# keV | 41(16) ms | α | 202mFr | (10−) | |- | 207Ac | | style="text-align:right" | 89 | style="text-align:right" | 118 | 207.01195(6) | 31(8) ms
[27(+11−6) ms] | α | 203Fr | 9/2−# | |- | rowspan=2|208Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 119 | rowspan=2|208.01155(6) | rowspan=2|97(16) ms
[95(+24−16) ms] | α (99%) | 204Fr | rowspan=2|(3+) | rowspan=2| |- | β+ (1%) | 208Ra |- | rowspan=3 style="text-indent:1em" | 208mAc | rowspan=3| | rowspan=3 colspan="3" style="text-indent:2em" | 506(26) keV | rowspan=3|28(7) ms
[25(+9−5) ms] | α (89%) | 204Fr | rowspan=3|(10−) | rowspan=3| |- | IT (10%) | 208Ac |- | β+ (1%) | 208Ra |- | rowspan=2|209Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 120 | rowspan=2|209.00949(5) | rowspan=2|92(11) ms | α (99%) | 205Fr | rowspan=2|(9/2−) | rowspan=2| |- | β+ (1%) | 209Ra |- | rowspan=2|210Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 121 | rowspan=2|210.00944(6) | rowspan=2|350(40) ms | α (96%) | 206Fr | rowspan=2|7+# | rowspan=2| |- | β+ (4%) | 210Ra |- | rowspan=2|211Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 122 | rowspan=2|211.00773(8) | rowspan=2|213(25) ms | α (99.8%) | 207Fr | rowspan=2|9/2−# | rowspan=2| |- | β+ (.2%) | 211Ra |- | rowspan=2|212Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 123 | rowspan=2|212.00781(7) | rowspan=2|920(50) ms | α (97%) | 208Fr | rowspan=2|6+# | rowspan=2| |- | β+ (3%) | 212Ra |- | rowspan=2|213Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 124 | rowspan=2|213.00661(6) | rowspan=2|731(17) ms | α | 209Fr | rowspan=2|(9/2−)# | rowspan=2| |- | β+ (rare) | 213Ra |- | rowspan=2|214Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 125 | rowspan=2|214.006902(24) | rowspan=2|8.2(2) s | α (89%) | 210Fr | rowspan=2|(5+)# | rowspan=2| |- | β+ (11%) | 214Ra |- | rowspan=2|215Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 126 | rowspan=2|215.006454(23) | rowspan=2|0.17(1) s | α (99.91%) | 211Fr | rowspan=2|9/2− | rowspan=2| |- | β+ (.09%) | 215Ra |- | rowspan=2|216Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 127 | rowspan=2|216.008720(29) | rowspan=2|0.440(16) ms | α | 212Fr | rowspan=2|(1−) | rowspan=2| |- | β+ (7×10−5%) | 216Ra |- | style="text-indent:1em" | 216mAc | | colspan="3" style="text-indent:2em" | 44(7) keV | 443(7) µs | | | (9−) | |- | rowspan=2|217Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 128 | rowspan=2|217.009347(14) | rowspan=2|69(4) ns | α | 213Fr | rowspan=2|9/2− | rowspan=2| |- | β+ (6.9×10−9%) | 217Ra |- | style="text-indent:1em" | 217mAc | | colspan="3" style="text-indent:2em" | 2012(20) keV | 740(40) ns | | | (29/2)+ | |- | 218Ac | | style="text-align:right" | 89 | style="text-align:right" | 129 | 218.01164(5) | 1.08(9) µs | α | 214Fr | (1−)# | |- | style="text-indent:1em" | 218mAc | | colspan="3" style="text-indent:2em" | 584(50)# keV | 103(11) ns | | | (11+) | |- | rowspan=2|219Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 130 | rowspan=2|219.01242(5) | rowspan=2|11.8(15) µs | α | 215Fr | rowspan=2|9/2− | rowspan=2| |- | β+ (10−6%) | 219Ra |- | rowspan=2|220Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 131 | rowspan=2|220.014763(16) | rowspan=2|26.36(19) ms | α | 216Fr | rowspan=2|(3−) | rowspan=2| |- | β+ (5×10−4%) | 220Ra |- | 221Ac | | style="text-align:right" | 89 | style="text-align:right" | 132 | 221.01559(5) | 52(2) ms | α | 217Fr | 9/2−# | |- | rowspan=2|222Ac | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 133 | rowspan=2|222.017844(6) | rowspan=2|5.0(5) s | α (99%) | 218Fr | rowspan=2|1− | rowspan=2| |- | β+ (1%) | 222Ra |- | rowspan=3 style="text-indent:1em" | 222mAc | rowspan=3| | rowspan=3 colspan="3" style="text-indent:2em" | 200(150)# keV | rowspan=3|1.05(7) min | α (88.6%) | 218Fr | rowspan=3|high | rowspan=3| |- | IT (10%) | 222Ac |- | β+ (1.4%) | 222Ra |- | rowspan=3|223Ac | rowspan=3| | rowspan=3 style="text-align:right" | 89 | rowspan=3 style="text-align:right" | 134 | rowspan=3|223.019137(8) | rowspan=3|2.10(5) min | α (99%) | 219Fr | rowspan=3|(5/2−) | rowspan=3| |- | EC (1%) | 223Ra |- | CD (3.2×10−9%) | 209Bi
14C |- | rowspan=3|224Ac | rowspan=3| | rowspan=3 style="text-align:right" | 89 | rowspan=3 style="text-align:right" | 135 | rowspan=3|224.021723(4) | rowspan=3|2.78(17) h | β+ (90.9%) | 224Ra | rowspan=3|0− | rowspan=3| |- | α (9.1%) | 220Fr |- | β− (1.6%) | 224Th |- | rowspan=2|225Ac[n 1] | rowspan=2| | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 136 | rowspan=2|225.023230(5) | rowspan=2|10.0(1) d | α | 221Fr | rowspan=2|(3/2−) | rowspan=2|Trace[n 2] |- | CD (6×10−10%) | 211Bi
14C |- | rowspan=3|226Ac | rowspan=3| | rowspan=3 style="text-align:right" | 89 | rowspan=3 style="text-align:right" | 137 | rowspan=3|226.026098(4) | rowspan=3|29.37(12) h | β− (83%) | 226Th | rowspan=3|(1)(−#) | rowspan=3| |- | EC (17%) | 226Ra |- | α (.006%) | 222Fr |- | rowspan=2|227Ac | rowspan=2|Actinium[n 3] | rowspan=2 style="text-align:right" | 89 | rowspan=2 style="text-align:right" | 138 | rowspan=2|227.0277521(26) | rowspan=2|21.772(3) y | β− (98.62%) | 227Th | rowspan=2|3/2− | rowspan=2|Trace[n 4] |- | α (1.38%) | 223Fr |- | 228Ac | Mesothorium 2 | style="text-align:right" | 89 | style="text-align:right" | 139 | 228.0310211(27) | 6.13(2) h | β− | 228Th | 3+ | Trace[n 5] |- | 229Ac | | style="text-align:right" | 89 | style="text-align:right" | 140 | 229.03302(4) | 62.7(5) min | β− | 229Th | (3/2+) | |- | 230Ac | | style="text-align:right" | 89 | style="text-align:right" | 141 | 230.03629(32) | 122(3) s | β− | 230Th | (1+) | |- | 231Ac | | style="text-align:right" | 89 | style="text-align:right" | 142 | 231.03856(11) | 7.5(1) min | β− | 231Th | (1/2+) | |- | 232Ac | | style="text-align:right" | 89 | style="text-align:right" | 143 | 232.04203(11) | 119(5) s | β− | 232Th | (1+) | |- | 233Ac | | style="text-align:right" | 89 | style="text-align:right" | 144 | 233.04455(32)# | 145(10) s | β− | 233Th | (1/2+) | |- | 234Ac | | style="text-align:right" | 89 | style="text-align:right" | 145 | 234.04842(43)# | 44(7) s | β− | 234Th | | |- | 235Ac | | style="text-align:right" | 89 | style="text-align:right" | 146 | 235.05123(38)# | 60(4) s | β− | 235Th | 1/2+# | |- | 236Ac[5] | | style="text-align:right" | 89 | style="text-align:right" | 147 | 236.05530(54)# | Шаблон:Val | β− | 236Th | | Шаблон:Isotopes table/footer

Actinides vs fission products

Шаблон:Actinides vs fission products

See also

References

Шаблон:Reflist

Шаблон:Navbox element isotopes Шаблон:Authority control

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ Шаблон:Cite book
  2. ↑ Шаблон:Cite journal
  3. ↑ 3,0 3,1 Шаблон:Cite journal
  4. ↑ Шаблон:Cite journal
  5. ↑ Шаблон:Cite journal


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