Kaliforniyum izotopları
Tablo

| nüklit sembolü | Z(p)> uyarılma enerjisi | N(n)> uyarılma enerjisi |   izotop kütlesi (u)  > uyarılma enerjisi | yarı ömrü | bozunum şekli | kız izotoplar | nükleer spin |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 237Cf | 98 | 139 | 237.06207(54)# | 2.1(3) s | KF | (çeşitli) | 5/2+# |
| 237Cf | 98 | 139 | 237.06207(54)# | 2.1(3) s | β+ | 237Bk | 5/2+# |
| 237Cf | 98 | 139 | 237.06207(54)# | 2.1(3) s | α | 233Cm | 5/2+# |
| 238Cf | 98 | 140 | 238.06141(43)# | 21.1(13) ms | KF | (çeşitli) | 0+ |
| 238Cf | 98 | 140 | 238.06141(43)# | 21.1(13) ms | β+ (rare) | 238Bk | 0+ |
| 238Cf | 98 | 140 | 238.06141(43)# | 21.1(13) ms | α (nadir) | 234Cm | 0+ |
| 239Cf | 98 | 141 | 239.06242(23)# | 60(30) s [39(+37-12) s] | α | 235Cm | 5/2+# |
| 239Cf | 98 | 141 | 239.06242(23)# | 60(30) s [39(+37-12) s] | β+ (nadir) | 239Bk | 5/2+# |
| 240Cf | 98 | 142 | 240.06230(22)# | 1.06(15) dk | α (98%) | 236Cm | 0+ |
| 240Cf | 98 | 142 | 240.06230(22)# | 1.06(15) dk | KF (2%) | (çeşitli) | 0+ |
| 240Cf | 98 | 142 | 240.06230(22)# | 1.06(15) dk | β+ (nadir) | 240Bk | 0+ |
| 241Cf | 98 | 143 | 241.06373(27)# | 3.78(70) dk | β+ (75%) | 241Bk | 7/2-# |
| 241Cf | 98 | 143 | 241.06373(27)# | 3.78(70) dk | α (25%) | 237Cm | 7/2-# |
| 242Cf | 98 | 144 | 242.06370(4) | 3.49(15) min | α (80%) | 238Cm | 0+ |
| 242Cf | 98 | 144 | 242.06370(4) | 3.49(15) min | β+ (20%) | 242Bk | 0+ |
| 242Cf | 98 | 144 | 242.06370(4) | 3.49(15) min | KF (.014%) | (çeşitli) | 0+ |
| 243Cf | 98 | 145 | 243.06543(15)# | 10.7(5) dk | β+ (86%) | 243Bk | (1/2+) |
| 243Cf | 98 | 145 | 243.06543(15)# | 10.7(5) dk | α (14%) | 239Cm | (1/2+) |
| 244Cf | 98 | 146 | 244.066001(3) | 19.4(6) dk | α (99%) | 240Cm | 0+ |
| 244Cf | 98 | 146 | 244.066001(3) | 19.4(6) dk | EY (1%) | 244Bk | 0+ |
| 245Cf | 98 | 147 | 245.068049(3) | 45.0(15) dk | β+ (64%) | 245Bk | (5/2+) |
| 245Cf | 98 | 147 | 245.068049(3) | 45.0(15) dk | α (36%) | 241Cm | (5/2+) |
| 246Cf | 98 | 148 | 246.0688053(22) | 35.7(5) saat | α | 242Cm | 0+ |
| 246Cf | 98 | 148 | 246.0688053(22) | 35.7(5) saat | EY (5×10−4%) | 246Bk | 0+ |
| 246Cf | 98 | 148 | 246.0688053(22) | 35.7(5) saat | KF (2×10−4%) | (çeşitli) | 0+ |
| 247Cf | 98 | 149 | 247.071001(9) | 3.11(3) saat | EC (99.96%) | 247Bk | (7/2+)# |
| 247Cf | 98 | 149 | 247.071001(9) | 3.11(3) saat | α (.04%) | 243Cm | (7/2+)# |
| 248Cf | 98 | 150 | 248.072185(6) | 333.5(28) g | α (99.99%) | 244Cm | 0+ |
| 248Cf | 98 | 150 | 248.072185(6) | 333.5(28) g | KF (.0029%) | (çeşitli) | 0+ |
| 249Cf | 98 | 151 | 249.0748535(24) | 351(2) a | α | 245Cm | 9/2- |
| 249Cf | 98 | 151 | 249.0748535(24) | 351(2) a | KF (5×10−7%) | (çeşitli) | 9/2- |
| 249mCf | 144.98(5) keV | 144.98(5) keV | 144.98(5) keV | 45(5) µs |  |  | 5/2+ |
| 250Cf | 98 | 152 | 250.0764061(22) | 13.08(9) a | α (99.92%) | 246Cm | 0+ |
| 250Cf | 98 | 152 | 250.0764061(22) | 13.08(9) a | KF (.077%) | (çeşitli) | 0+ |
| 251Cf | 98 | 153 | 251.079587(5) | 900(40) a | α | 247Cm | 1/2+ |
| 252Cf | 98 | 154 | 252.081626(5) | 2.645(8) a | α (96.9%) | 248Cm | 0+ |
| 252Cf | 98 | 154 | 252.081626(5) | 2.645(8) a | KF (3.09%) | (çeşitli) | 0+ |
| 253Cf | 98 | 155 | 253.085133(7) | 17.81(8) g | β- (99.69%) | 253Es | (7/2+) |
| 253Cf | 98 | 155 | 253.085133(7) | 17.81(8) g | α (.31%) | 249Cm | (7/2+) |
| 254Cf | 98 | 156 | 254.087323(13) | 60.5(2) g | KF (99.69%) | (çeşitli) | 0+ |
| 254Cf | 98 | 156 | 254.087323(13) | 60.5(2) g | α (.31%) | 250Cm | 0+ |
| 254Cf | 98 | 156 | 254.087323(13) | 60.5(2) g | β-β- (nadir) | 254Fm | 0+ |
| 255Cf | 98 | 157 | 255.09105(22)# | 85(18) dk | β- (99.99%) | 255Es | (7/2+) |
| 255Cf | 98 | 157 | 255.09105(22)# | 85(18) dk | KF (.001%) | (çeşitli) | (7/2+) |
| 255Cf | 98 | 157 | 255.09105(22)# | 85(18) dk | α (10−5%) | 251Cm | (7/2+) |
| 256Cf | 98 | 158 | 256.09344(32)# | 12.3(12) dk | KF (99%) | (çeşitli) | 0+ |
| 256Cf | 98 | 158 | 256.09344(32)# | 12.3(12) dk | β- (1%) | 256Es | 0+ |
| 256Cf | 98 | 158 | 256.09344(32)# | 12.3(12) dk | α (10−6%) | 252Cm | 0+ |
| 256Cf | 98 | 158 | 256.09344(32)# | 12.3(12) dk | β-β- (rare) | 256Fm | 0+ |
↑  Kısaltmalar:
EY: Elektron yakalama
KF: Kendiliğinden fisyon
↑  Yüksek nötron tesir kesiti, nötronları absorbe etme eğilimine sebep olur.
↑  En yaygın izotop
↑  Yüksek nötron yayıcı, fisyon başına 3,7 milyon nötron yayar.