Author: C. Morse |  Citation: Nucl. Data Sheets 182, 167 (2022) |  Cutoff date: 14-Sep-2021 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=-4600 keV SYS(n)= 5869 keV SYS(p)= 2485 keV SYQ(α)= 1.137×104 keV 5
Reference: 2021WA16

  A  277Cn α decay (0.61 MS) 

General Comments:

$ 273Ds has been observed as the α-decay daughter of 277Cn at GSI (1996Ho13,2002Ho11) and RIKEN (2007Mo09,2013Su04). Chains of correlated α-decays were observed, and the properties of these chains were compared to previous studies in order to assign specific decays to individual nuclei.

$ 1996Ho13 reports two chains containing 273Ds, but the data was reanalyzed in 2002Ho11 and one chain was found to be reported in error.

$ 1996La12 reports several chains which are assigned to the decay of 273Ds. However, the properties of these chains, especially the total decay time, are not in good agreement with other published results.

$ 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-)=424, ΔS(n)=447, ΔS(p)=506 (2021Wa16)

Q-value: S(2n)=13810 syst 172, S(2p)=3984 syst 310, Q(εp)=1992 syst 529 (2021Wa16)

XREF T1/2(level)
  0A 0.19 ms +14-6 
% α = 100
% SF < 17

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Additional Level Data and Comments:


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