ADOPTED LEVELS for 293Lv
Author: C. Morse | Citation: Nucl. Data Sheets 182, 167 (2022) | Cutoff date: 14-Sep-2021
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-3860 keV SY | S(n)= 5636 keV SY | S(p)= 3321 keV SY | Q(α)= 1.068×104 keV 6 | ||
| Reference: 2021WA16 |
| E(level) (keV) | T1/2(level) |
| 0 | 95 ms +63-27 % α = 100 % SF ≤ 12.5 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
$ Four publications have reported the production of 293Lv through the 248Cm(48Ca,3n) reaction, two using DGFRS at JINR (2001Og01,2002Og09), one using SHIP at GSI (2012Ho12), and one using GARIS at RIKEN (2017Ka66). In the DGFRS experiments, 293Lv was originally identified as 292Lv, but the assignment was later revised. Evaporation residues from the reaction were implanted into position-sensitive silicon detectors, and identified by the observation of subsequent time- and position-correlated α-decay chains terminated by spontaneous fission. Comparison of the decay chains with the properties of the known daughter nuclei allowed assignment of the evaporation residues to 293Lv. α total of seven events were positively identified, with another three events being considered tentative.
$ 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-)=933, ΔS(n)=920, ΔS(p)=869 (2021Wa16)
Q-value: S(2n)=12819 syst 808, S(2p)=5510 syst 869 (2021Wa16)