Isotopes of Rutherfordium
List of known isotopes of the element Rutherfordium.
| Isotope | t½ | % | Spin/parity | Radius | Isotopic mass | Discovery |
|---|---|---|---|---|---|---|
| 253Rf | 9.9 ±12 ms | syn. | (1/2+) | — | 2.531·108 ±440 keV/c2 | 1997 |
| 254Rf | 23.2 ±11 us | syn. | 0+ | — | 2.541·108 ±304 keV/c2 | 1997 |
| 255Rf | 1.68 ±9 s | syn. | (9/2-) | — | 2.551·108 ±194 keV/c2 | 1975 |
| 256Rf | 6.67 ±10 ms | syn. | 0+ | — | 2.561·108 ±19.16 keV/c2 | 1975 |
| 257Rf | 4.4 ± s | syn. | (1/2+) | — | 2.571·108 ±11.61 keV/c2 | 1969 |
| 258Rf | 12 ±12 ms | syn. | 0+ | — | 2.581·108 ±17.28 keV/c2 | 1969 |
| 259Rf | 2.4 ±4 s | syn. | — | — | 2.591·108 ±78 keV/c2 | 1969 |
| 260Rf | 21 ±1 ms | syn. | 0+ | — | 2.601·108 ±215 keV/c2 | 1985 |
| 261Rf | 68 ±3 s | syn. | — | — | 2.611·108 ±70.49 keV/c2 | 1970 |
| 262Rf | 2.3 ±4 s | syn. | 0+ | — | 2.621·108 ±240 keV/c2 | 1985 |
| 263Rf | 10 ±2 m | syn. | — | — | 2.631·108 ±164 keV/c2 | 2003 |
| 265Rf | 1 ± m | syn. | — | — | 2.651·108 ±387 keV/c2 | 2010 |
| 267Rf | 1.3 ± h | syn. | — | — | 2.671·108 ±617 keV/c2 | 2004 |
253RfRutherfordium-253
| Classification | z: 104; n: 149; m: 253 |
|---|---|
| Half life | 9.9 ±12 ms |
| Natural abundance | synthetic nuclide |
| Spin/parity | (1/2+) |
| Decay modes | spontaneous fission; α decay |
| Discovery | 1997 |
| Mass excess | 93,640 ±410 keV |
| Binding energy | 7,380 ±2 keV |
| Single-particle energy | 2,184 ±450 keV |
| Q value for electron capture | 5,118 ±441.7 keV |
254RfRutherfordium-254
| Classification | z: 104; n: 150; m: 254 |
|---|---|
| Half life | 23.2 ±11 us |
| Natural abundance | synthetic nuclide |
| Spin/parity | 0+ |
| Decay modes | spontaneous fission; α decay |
| Discovery | 1997 |
| Mass excess | 93,200 ±283 keV |
| Binding energy | 7,384 ±1 keV |
| Single-particle energy | 2,611 ±328 keV |
| Neutron separation energy | 8,512 ±498 keV |
| Q value for electron capture | 3,555 ±297.3 keV |
255RfRutherfordium-255
| Classification | z: 104; n: 151; m: 255 |
|---|---|
| Half life | 1.68 ±9 s |
| Natural abundance | synthetic nuclide |
| Spin/parity | (9/2-) |
| Decay modes | spontaneous fission; α decay; electron capture + β⁺ decay |
| Discovery | 1975 |
| Mass excess | 94,320 ±181 keV |
| Binding energy | 7,382 ±1 keV |
| Single-particle energy | 2,605 ±203 keV |
| Neutron separation energy | 6,943 ±336 keV |
| Q value for electron capture | 4,381 ±181.8 keV |
| β⁻ decay energy | -5,265 ±336 keV |
256RfRutherfordium-256
| Classification | z: 104; n: 152; m: 256 |
|---|---|
| Half life | 6.67 ±10 ms |
| Natural abundance | synthetic nuclide |
| Spin/parity | 0+ |
| Decay modes | spontaneous fission; α decay |
| Discovery | 1975 |
| Mass excess | 94,220 ±17.84 keV |
| Binding energy | 7,385 ±0.0697 keV |
| Single-particle energy | 3,014 ±25.13 keV |
| Neutron separation energy | 8,179 ±182 keV |
| Q value for electron capture | 2,475 ±84.8 keV |
| β⁻ decay energy | -6,076 ±188 keV |
| β⁻ decay energy with neutron | -13,450 ±284 keV |
257RfRutherfordium-257
| Classification | z: 104; n: 153; m: 257 |
|---|---|
| Half life | 4.4 ± s |
| Natural abundance | synthetic nuclide |
| Spin/parity | (1/2+) |
| Decay modes | α decay; electron capture (EC); spontaneous fission |
| Discovery | 1969 |
| Mass excess | 95,860 ±10.81 keV |
| Binding energy | 7,381 ±0.0421 keV |
| Single-particle energy | 3,169 ±83.6 keV |
| Neutron separation energy | 6,426 ±20.84 keV |
| Q value for electron capture | 3,201 ±45.31 keV |
| β⁻ decay energy | -4,288 ±164.9 keV |
| β⁻ decay energy with neutron | -12,510 ±188 keV |
258RfRutherfordium-258
| Classification | z: 104; n: 154; m: 258 |
|---|---|
| Half life | 12 ±12 ms |
| Natural abundance | synthetic nuclide |
| Spin/parity | 0+ |
| Decay modes | spontaneous fission; α decay |
| Discovery | 1969 |
| Mass excess | 96,340 ±16.1 keV |
| Binding energy | 7,382 ±0.0624 keV |
| Single-particle energy | 3,610 ±47 keV |
| Neutron separation energy | 7,593 ±19.37 keV |
| Q value for electron capture | 1,562 ±103.2 keV |
| β⁻ decay energy | -5,164 ±93.25 keV |
| β⁻ decay energy with neutron | -11,890 ±165.4 keV |
259RfRutherfordium-259
| Classification | z: 104; n: 155; m: 259 |
|---|---|
| Half life | 2.4 ±4 s |
| Natural abundance | synthetic nuclide |
| Decay modes | α decay; electron capture (EC); spontaneous fission |
| Discovery | 1969 |
| Mass excess | 98,360 ±72 keV |
| Binding energy | 7,377 keV |
| Single-particle energy | 3,704 ±125 keV |
| Neutron separation energy | 6,049 ±74 keV |
| Q value for electron capture | 2,516 ±101.1 keV |
| β⁻ decay energy | -3,624 ±92 keV |
| β⁻ decay energy with neutron | -11,220 ±117 keV |
260RfRutherfordium-260
| Classification | z: 104; n: 156; m: 260 |
|---|---|
| Half life | 21 ±1 ms |
| Natural abundance | synthetic nuclide |
| Spin/parity | 0+ |
| Decay modes | spontaneous fission |
| Discovery | 1985 |
| Mass excess | 99,140 ±200 keV |
| Binding energy | 7,377 ±1 keV |
| Single-particle energy | 3,992 ±212 keV |
| Neutron separation energy | 7,290 ±213 keV |
| Q value for electron capture | 871 ±235.8 keV |
| β⁻ decay energy | -4,525 ±221 keV |
| β⁻ decay energy with neutron | -10,920 ±208 keV |
261RfRutherfordium-261
| Classification | z: 104; n: 157; m: 261 |
|---|---|
| Half life | 68 ±3 s |
| Natural abundance | synthetic nuclide |
| Decay modes | α decay |
| Discovery | 1970 |
| Mass excess | 101,300 ±65.66 keV |
| Binding energy | 7,371 ±0.2516 keV |
| Single-particle energy | 4,247 ±141 keV |
| Neutron separation energy | 5,901 ±211 keV |
| Q value for electron capture | 1,761 ±210.5 keV |
| β⁻ decay energy | -2,990 ±128 keV |
| β⁻ decay energy with neutron | -10,430 ±114 keV |
262RfRutherfordium-262
| Classification | z: 104; n: 158; m: 262 |
|---|---|
| Half life | 2.3 ±4 s |
| Natural abundance | synthetic nuclide |
| Spin/parity | 0+ |
| Decay modes | spontaneous fission |
| Discovery | 1985 |
| Mass excess | 102,300 ±224 keV |
| Binding energy | 7,370 ±1 keV |
| Single-particle energy | 4,454 ±300 keV |
| Neutron separation energy | 6,997 ±233 keV |
| Q value for electron capture | 287 ±300.2 keV |
| β⁻ decay energy | -3,861 ±265 keV |
| β⁻ decay energy with neutron | -9,987 ±249 keV |
263RfRutherfordium-263
| Classification | z: 104; n: 159; m: 263 |
|---|---|
| Half life | 10 ±2 m |
| Natural abundance | synthetic nuclide |
| Decay modes | α decay; spontaneous fission |
| Discovery | 2003 |
| Mass excess | 104,700 ±153 keV |
| Binding energy | 7,364 ±1 keV |
| Single-particle energy | 4,638 ±252 keV |
| Neutron separation energy | 5,707 ±271 keV |
| β⁻ decay energy | -2,353 ±227 keV |
| β⁻ decay energy with neutron | -9,568 ±209 keV |
265RfRutherfordium-265
| Classification | z: 104; n: 161; m: 265 |
|---|---|
| Half life | 1 ± m |
| Natural abundance | synthetic nuclide |
| Decay modes | spontaneous fission |
| Discovery | 2010 |
| Mass excess | 108,600 ±361 keV |
| Binding energy | 7,354 ±1 keV |
| Single-particle energy | 4,974 ±566 keV |
| Neutron separation energy | 5,456 ±510 keV |
| β⁻ decay energy | -1,692 ±424 keV |
| β⁻ decay energy with neutron | -8,643 ±431 keV |
267RfRutherfordium-267
| Classification | z: 104; n: 163; m: 267 |
|---|---|
| Half life | 1.3 ± h |
| Natural abundance | synthetic nuclide |
| Decay modes | spontaneous fission; α decay |
| Discovery | 2004 |
| Mass excess | 113,400 ±575 keV |
| Binding energy | 7,342 ±2 keV |
| Single-particle energy | 5,507 ±788 keV |
| Neutron separation energy | 4,763 ±707 keV |
| β⁻ decay energy | -570 ±686 keV |
| β⁻ decay energy with neutron | -7,368 ±640 keV |