Bk
Беркелій
Z 97 247,0 г/мольАктиноїд Радіоактивний
| 233Bk | 136 | 233,0567 | 52 770,0 | --- | 40,0 с | (3/2-) | α→229Am(82%) β⁺→233Cm | 2015 |
| 234Bk | 137 | 234,0573 | 53 400,0 | --- | 20,0 с | (3-) | α→230Am(>80%) β⁺→234Cm(<20%) | 2003 |
| 235Bk | 138 | 235,0567 | 52 770,0 | --- | 1,0 хв | (3/2-) | β⁺→235Cm α→231Am | --- |
| 236Bk | 139 | 236,0575 | 53 540,0 | --- | 26,0 с | (4+) | β⁺→236Cm(99,96%) β⁺SF(0,04%) α→232Am | 2017 |
| 237Bk | 140 | 237,0571 | 53 210,0 | --- | 2,0 хв | (3/2-) | β⁺→237Cm α→233Am | --- |
| 238Bk | 141 | 238,0582 | 54 220,0 | --- | 2,4 хв | (1) | β⁺→238Cm(99,952%) β⁺SF(0,048%) α→234Am | 1994 |
| 239Bk | 142 | 239,0582 | 54 250,0 | --- | 1,67 хв | (7/2+) | β⁺→239Cm(~100%) α→235Am(<0,01%) SF(<0,01%) | 1989 |
| 240Bk | 143 | 240,0598 | 55 660,0 | --- | 4,8 хв | (7-) | β⁺SF(0,002%) β⁺→240Cm α→236Am | 1980 |
| 241Bk | 144 | 241,0601 | 55 980,0 | --- | 4,6 хв | (7/2+) | β⁺→241Cm α→237Am | 2003 |
| 242Bk | 145 | 242,062 | 57 750,0 | --- | 7,0 хв | (3+) | β⁺→242Cm(~100%) β⁺SF(<3е-5%) α→238Am | 1972 |
| 242mBk | 145 | 242,0641 | 59 750,0 | --- | 600,0 нс | --- | SF(100%) γ→242Bk | 1972 |
| 243Bk | 146 | 243,063 | 58 690,0 | --- | 4,6 год | 3/2- | β⁺→243Cm(~100%) α→239Am(0,15%) | 1950 |
| 244Bk | 147 | 244,0652 | 60 714,0 | --- | 5,02 год | 4- | α→240Am(0,006%) β⁺→244Cm | 1972 |
| 244mBk | 147 | 244,0668 | 62 210,0 | --- | 820,0 нс | --- | SF(100%) γ→244Bk | 1972 |
| 245Bk | 148 | 245,0664 | 61 813,8 | --- | 4,95 д | 3/2- | EC→245Cm(99,88%) α→241Am(0,12%) | 1951 |
| 246Bk | 149 | 246,0687 | 63 970,0 | --- | 1,8 д | (2-) | β⁺→246Cm(100%) α→242Am | 1954 |
| 247Bk | 150 | 247,0703 | 65 490,0 | --- | 1,38 кр | 3/2- | α→243Am(100%) SF | 1965 |
| 248Bk | 151 | 248,0731 | 68 130,0 | --- | --- | (6+) | α→244Am EC→248Cm | 1956 |
| 248mBk | 151 | 248,0731 | 68 108,0 | --- | 23,7 год | (1-) | β⁻→248Cf(70%) EC→248Cm(30%) α→244Am | 1956 |
| 249Bk | 152 | 249,075 | 69 846,3 | --- | 327,2 д | 7/2+ | β⁻→249Cf(~100%) α→245Am(0,001%) SF(4,7е-8%) | 1954 |
| 249mBk | 152 | 249,075 | 69 855,1 | --- | 300,0 мкс | 3/2- | γ→249Bk(100%) | 1960 |
| 250Bk | 153 | 250,0783 | 72 952,0 | --- | 3,21 год | 2- | β⁻→250Cf(100%) | 1954 |
| 250mBk | 153 | 250,0784 | 72 987,6 | --- | 29,0 мкс | 4+ | γ→250Bk(100%) | 1966 |
| 250nBk | 153 | 250,0784 | 73 038,0 | --- | 213,0 мкс | 7+ | γ→250Bk(100%) | 1972 |
| 251Bk | 154 | 251,0808 | 75 228,0 | --- | 55,6 хв | (3/2-) | β⁻→251Cf(100%) | 1967 |
| 251mBk | 154 | 251,0808 | 75 264,0 | --- | 58,0 мкс | (7/2+) | γ→251Bk(100%) | 1966 |
| 252Bk | 155 | 252,0843 | 78 540,0 | --- | 1,8 хв | --- | β⁻→252Cf α→248Am | 1988 |
| 253Bk | 156 | 253,0869 | 80 930,0 | --- | 1,0 год | (3/2-) | β⁻→253Cf | 1991 |
| 254Bk | 157 | 254,0906 | 84 390,0 | --- | 1,0 хв | --- | β⁻→254Cf | --- |