ADOPTED LEVELS for 277Cn
Author: C. Morse | Citation: Nucl. Data Sheets 182, 167 (2022) | Cutoff date: 14-Sep-2021
Full ENSDF file | Adopted Levels (PDF version)
S(n)= 6099 keV SY | S(p)= 2343 keV SY | Q(α)= 1.162×104 keV 6 | |||
Reference: 2021WA16 |
E(level) (keV) | T1/2(level) |
0 | 0.61 ms +46-18 % α = 100 % SF < 17 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
$ 277Cn has been observed in the 208Pb(70Zn,n) reaction at GSI (1996Ho13,2002Ho11) and RIKEN (2007Mo09,2013Su04). Events were identified by the observation of chains of correlated α decays. Comparison of the properties of these chains with those previously observed allowed individual decays to be assigned to specific nuclei.
$ 1996Ho13 reports two decay chains. However, the data is reanalyzed in 2002Ho11 and the chain from 01-Feb-1998 is found to be reported in error.
$ 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: ΔS(n)=523, ΔS(p)=647 (2021Wa16)
Q-value: S(2p)=3912 syst 373, Q(εp)=2504 syst 569 (2021Wa16)