Ac
Актиній
Z 89 227,0 г/мольАктиноїд Радіоактивний
| 205Ac | 116 | 205,0151 | 14 110,0 | --- | 80,0 мс | 9/2- | α→201Fr(100%) β⁺→205Ra | 2014 |
| 206Ac | 117 | 206,0145 | 13 480,0 | --- | 25,0 мс | 3+ | α→202Fr(100%) β⁺→206Ra | 1998 |
| 206mAc | 117 | 206,0147 | 13 690,0 | --- | 41,0 мс | 10- | α→202Fr(100%) β⁺→206Ra | 1996 |
| 207Ac | 118 | 207,012 | 11 150,0 | --- | 31,0 мс | 9/2- | α→203Fr(100%) | 1994 |
| 208Ac | 119 | 208,0116 | 10 760,0 | --- | 97,0 мс | 3+ | α→204Fr(100%) β⁺→208Ra | 1994 |
| 208mAc | 119 | 208,0121 | 11 258,0 | --- | 28,0 мс | 10- | α→204Fr(100%) γ→208Ac β⁺→208Ra | 1994 |
| 209Ac | 120 | 209,0095 | 8 840,0 | --- | 94,0 мс | 9/2- | α→205Fr(100%) β⁺→209Ra | 1968 |
| 210Ac | 121 | 210,0094 | 8 760,0 | --- | 350,0 мс | (7+) | α→206Fr(100%) β⁺→210Ra | 1968 |
| 211Ac | 122 | 211,0077 | 7 140,0 | --- | 213,0 мс | 9/2- | α→207Fr(100%) β⁺→211Ra | 1968 |
| 212Ac | 123 | 212,0078 | 7 300,0 | --- | 895,0 мс | 7+ | α→208Fr(100%) β⁺→212Ra | 1968 |
| 213Ac | 124 | 213,0066 | 6 141,0 | --- | 738,0 мс | 9/2- | α→209Fr(100%) β⁺→213Ra | 1968 |
| 214Ac | 125 | 214,0069 | 6 433,0 | --- | 8,2 с | 5+ | α→210Fr(93%) β⁺→214Ra(7%) | 1968 |
| 215Ac | 126 | 215,0065 | 6 031,0 | --- | 171,0 мс | 9/2- | α→211Fr(~100%) β⁺→215Ra(0,09%) | 1968 |
| 215mAc | 126 | 215,0084 | 7 827,0 | --- | 185,0 нс | (21/2-) | γ→215Ac(100%) | 1983 |
| 215nAc | 126 | 215,0091 | 8 520,0 | --- | 335,0 нс | (29/2+) | γ→215Ac(100%) | 1983 |
| 216Ac | 127 | 216,0087 | 8 150,0 | --- | 440,0 мкс | (1-) | α→212Fr(100%) β⁺→216Ra | 1967 |
| 216mAc | 127 | 216,0088 | 8 188,0 | --- | 441,0 мкс | (9-) | α→212Fr(100%) β⁺→216Ra | 1966 |
| 216nAc | 127 | 216,0092 | 8 570,0 | --- | --- | --- | γ→216Ac(100%) | 2006 |
| 217Ac | 128 | 217,0093 | 8 702,0 | --- | 69,0 нс | 9/2- | α→213Fr(100%) β⁺→217Ra | 1972 |
| 217mAc | 128 | 217,0115 | 10 715,0 | --- | 740,0 нс | 29/2+ | γ→217Ac(95,49%) α→213Fr(4,51%) | 1973 |
| 218Ac | 129 | 218,0116 | 10 850,0 | --- | 1,0 мкс | (1-) | α→214Fr(100%) | 1970 |
| 218mAc | 129 | 218,0117 | 10 900,0 | --- | --- | (8-) | γ→218Ac α→214Fr β⁺→218Ra | --- |
| 218nAc | 129 | 218,0123 | 11 460,0 | --- | 103,0 нс | (11+) | γ→218Ac(100%) | 1994 |
| 219Ac | 130 | 219,0124 | 11 570,0 | --- | 9,4 мкс | 9/2- | α→215Fr(100%) β⁺→219Ra | 1970 |
| 220Ac | 131 | 220,0148 | 13 744,0 | --- | 26,36 мс | (3-) | α→216Fr(100%) β⁺→220Ra | 1970 |
| 221Ac | 132 | 221,0156 | 14 530,0 | --- | 52,0 мс | (9/2-) | α→217Fr(100%) | 1968 |
| 222Ac | 133 | 222,0178 | 16 622,0 | --- | 5,0 с | 1- | α→218Fr(99%) β⁺→222Ra(1%) | 1949 |
| 222mAc | 133 | 222,0179 | 16 700,0 | --- | 1,05 хв | (5+) | α→218Fr(98,6%) β⁺→222Ra(1,4%) γ→222Ac | 1972 |
| 223Ac | 134 | 223,0191 | 17 825,0 | --- | 2,1 хв | (5/2-) | α→219Fr(99%) EC→223Ra | 1948 |
| 224Ac | 135 | 224,0217 | 20 234,0 | --- | 2,78 год | (0-) | β⁺→224Ra(90,5%) α→220Fr(9,5%) β⁻→224Th | 1948 |
| 225Ac | 136 | 225,0232 | 21 637,0 | --- | 9,92 д | 3/2- | α→221Fr(~100%) CD→211Bi(5,3е-10%) | 1947 |
| 226Ac | 137 | 226,0261 | 24 309,0 | --- | 1,22 д | (1-) | β⁻→226Th(83%) EC→226Ra(17%) α→222Fr(0,006%) | 1950 |
| 227Ac | 138 | 227,0278 | 25 849,5 | --- | 21,77 р | 3/2- | β⁻→227Th(98,62%) α→223Fr(1,38%) | 1851 |
| 228Ac | 139 | 228,031 | 28 894,7 | --- | 6,15 год | 3+ | β⁻→228Th(100%) | 1908 |
| 228mAc | 139 | 228,0316 | 29 430,0 | --- | 3,0 хв | --- | γ→228Ac β⁻→228Th | 2008 |
| 229Ac | 140 | 229,0329 | 30 690,0 | --- | 1,05 год | 3/2+ | β⁻→229Th(100%) | 1952 |
| 230Ac | 141 | 230,0363 | 33 838,0 | --- | 2,03 хв | (1+) | β⁻→230Th(~100%) β⁻SF(1,2е-6%) | 1973 |
| 231Ac | 142 | 231,0384 | 35 763,0 | --- | 7,5 хв | 1/2+ | β⁻→231Th(100%) | 1973 |
| 232Ac | 143 | 232,042 | 39 154,0 | --- | 1,98 хв | (1+) | β⁻→232Th(100%) | 1986 |
| 233Ac | 144 | 233,0443 | 41 308,0 | --- | 2,38 хв | (1/2+) | β⁻→233Th(100%) | 1983 |
| 234Ac | 145 | 234,0481 | 44 841,0 | --- | 45,0 с | (1+) | β⁻→234Th(100%) | 1986 |
| 234mAc | 145 | 234,0483 | 44 980,0 | --- | --- | --- | β⁻→234Th γ→234Ac | 2008 |
| 234nAc | 145 | 234,0488 | 45 460,0 | --- | 3,0 хв | --- | β⁻→234Th γ→234Ac | 2008 |
| 235Ac | 146 | 235,0508 | 47 357,0 | --- | 1,03 хв | (1/2+) | β⁻→235Th(100%) | 2006 |
| 236Ac | 147 | 236,055 | 51 220,0 | --- | 4,5 хв | (3+) | β⁻→236Th(100%) | 2010 |
| 237Ac | 148 | 237,058 | 54 020,0 | --- | 23,0 с | (1/2+) | β⁻→237Th | --- |