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 SYS(p)= 2343 keV SYQ(α)= 1.162×104 keV 6
Reference: 2021WA16

General 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)

  0 0.61 ms +46-18 
% α = 100
% SF < 17

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Additional Level Data and Comments:


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