ADOPTED LEVELS for 277Ds
Author: C. Morse | Citation: Nucl. Data Sheets 182, 167 (2022) | Cutoff date: 14-Sep-2021
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-3315 keV SY | S(n)= 5519 keV SY | S(p)= 3509 keV SY | Q(α)= 10900 keV SY | ||
| Reference: 2021WA16 |
| References: | |||
| A | 281Cn α decay (0.18 S) | ||
| E(level) (keV) | XREF | T1/2(level) |
| 0 | A | 3.5 ms +21-10 % α = 100 % SF ≤ 12.5 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
$ 277Ds has been observed as the α-decay daughter of 281Cn at LBNL (2010El06) and JINR (2015Ut02,2018Ut02). Events were identified by the observation of chains of α-decaying nuclei terminated by spontaneous fission. Comparison of the properties of the chains with those previously observed in the literature allowed decays to be assigned to specific nuclei.
$ 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-)=611, ΔS(n)=674, ΔS(p)=661, ΔQ(α)=119 (2021Wa16)
Q-value: S(2n)=12716 syst 519, S(2p)=5978 syst 711 (2021Wa16)