ADOPTED LEVELS, GAMMAS for 272Bh
Author: Balraj Singh | Citation: Nucl. Data Sheets 156, 148 (2019) | Cutoff date: 31-Jan-2019
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-220 keV SY | S(n)= 5200 keV SY | S(p)= 3260 keV SY | Q(α)= 9300 keV 50 | ||
| Reference: 2017WA10 |
| References: | |||
| A | 276Mt α decay (0.69 S) | ||
| E(level) (keV) | XREF | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | A | 10.5 s +15-11 % α ≈ 100 | |||||
| 60.2 10 ? | A | ||||||
| 196.2 10 ? | A | 136 1 | 100 | (E1) | 60.2 | ||
| 362.2 5 | A | 166 1 302 1 ? 362.2 5 | 10 5 100 | (E1) [E1] [E1] | 196.2 60.2 0.0 | ||
| 434 1 ? | A | 434 1 ? | 100 | [E1] | 0.0 | ||
| 479.6 23 ? | A | 479.6 23 ? | 100 | [E1] | 0.0 | ||
E(level): From Eγ data
M(γ): Multipolarities in square bracket are assumed by 2015Ga24 for GEANT simulations.
| E(level) (keV) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 196.2 | 136 1 | (E1) | 0.0878 | α=0.0878 | |
| 362.2 | 166 1 | (E1) | 0.0543 | α=0.0543 | |
| 302 1 | [E1] | 0.0554 | α=0.0554 | ||
| 362.2 5 | [E1] | 0.0390 | α=0.0390 | ||
| 434 | 434 1 | [E1] | 0.0278 | α=0.0278 | |
| 479.6 | 479.6 23 | [E1] | 0.0232 | α=0.0232 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 10.5 s +15-11 % α ≈ 100 | Only the α decay mode has been observed. E(level): Only the α decay mode has been observed. |
The 272Bh nuclide is produced in about 100 (or 113) correlated decay chains observed at Dubna, GSI and Berkeley, starting from 288Mc and ending in 268Db, which decays by SF. Main references for production of 288Mc: 2004Og03, 2005Og02, 2005Dm03, 2012Og02, 2013Ru11, 2015Ru11, 2013Og01, 2015Ga24, 2016Fo10. See 288Mc Adopted Levels for details.
2012Og02 and 2013Og01 proposed an isomer in 276Mt with a half-life of 4 s, which could decay by α to 272Bh, but it has not been confirmed in the work of 2013Ru11 (also 2016Fo10). 2013Ru11 suggest that the isomer could be equally associated with 280Rg or 272Bh
Data for excited states and gamma rays are from 276Mt α decay based on studies by 2013Ru11 (at GSI) and 2015Ga24 (at Berkeley)
For theoretical studies, consult Nuclear Science References (NSR) database at NNDC, BNL for 56 primary references dealing with the half-lives and other aspects of nuclear structure in this mass region
Q-value: Estimated uncertainties (2017Wa10): ΔQ(β-)=740, ΔS(n)=680, ΔS(p)=790.
Q-value: S(2n)=11580 600, S(2p)=8100 810 (syst,2017Wa10)
Q-value: Other Q(α): 9.21 MeV 1 (2017Og01,2013Ru11), 9.18 MeV 1 (2015Og05), 9.15 MeV 6 (2004Og03)