ADOPTED LEVELS for 275Hs
Author: C. Morse | Citation: Nucl. Data Sheets 182, 130 (2022). | Cutoff date: 14-Sep-2021
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-2275 keV SY | S(n)= 4985 keV SY | S(p)= 4559 keV SY | Q(α)= 9.45×103 keV 5 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 279Ds α decay (0.216 S) | ||
| E(level) (keV) | XREF | T1/2(level) |
| 0 | A | 0.20 s +19-7 % α = 100 % SF ≤ 20 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 0.20 s +19-7 % α = 100 % SF ≤ 20 | Assumed ground state. E(level): Assumed ground state. |
$ 275Hs has been observed as the α-decay daughter of 279Ds at JINR (2004Og12,2006Og05) and GSI (2012Ho12). Chains of α-decaying nuclei, terminated by spontaneous fission, were observed and compared to previously published data to assign each decay to specific nuclei.
$ 2016Ho09 revises the assignment of chain #1 in 2012Ho12 to begin with 291Lv, and identifies a missing α decay. Thus, what is labeled 281Ds in that chain actually corresponds to 275Hs.
$ Half-lives, branching ratios, and α-decay energies in this evaluation have been computed from the individual events listed in the references above. Half-life uncertainties have been computed according to the method of 1984Sc13. An additional 10 keV systematic uncertainty is assumed for the α-decay energies, which is added in quadrature to the averaged statistical uncertainty.
Q-value: ΔQ(β-)=709, ΔS(n)=756, ΔS(p)=828 (2021Wa16)
Q-value: S(2n)=11418 syst 701, S(2p)=8006 syst 715 (2021Wa16)