ADOPTED LEVELS for 271Sg
Author: C. Morse | Citation: Nucl. Data Sheets 182, 130 (2022). | Cutoff date: 14-Sep-2021
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-1242 keV SY | S(n)= 4885 keV SY | S(p)= 5069 keV SY | Q(α)= 8748 keV SY | ||
| Reference: 2021WA16 |
| References: | |||
| A | 275Hs α decay (0.20 S) | ||
| E(level) (keV) | XREF | T1/2(level) |
| 0 | A | 96 s +88-31 % α = 50 % SF = 50 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
$ 271Sg has been observed as the α-decay daughter of 275Hs at JINR (2004Og12,2006Og05) and GSI (2012Ho12). Chains of α-decaying nuclei were observed which terminated in spontaneous fission. The properties of these chains were compared to the literature in order to assign individual decays to specific nuclei.
$ 2016Ho09 revises chain #1 in 2012Ho12 to begin with 291Lv. An additional α decay was also identified, such that the decay labeled as 277Hs is actually 271Sg.
$ 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-)=705, ΔS(n)=748, ΔS(p)=824, ΔQ(α)=138 (2021Wa16)
Q-value: S(2n)=11218 syst 696 (2021Wa16)