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

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=-3015 keV SYS(n)= 5309 keV SYS(p)= 4309 keV SYQ(α)= 9.65×103 keV 6
Reference: 2021WA16

  A  277Ds α decay (3.5 MS) 

General Comments:

$ 273Hs has been observed as the α-decay daughter of 277Ds at LBNL (2010El06) and JINR (2015Ut02,2018Ut02). Events were identified based on the observation of chains of correlated α decays, terminated by spontaneous fission. Comparison of the properties of these chains with previous observations allowed individual 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-)=565, ΔS(n)=632, ΔS(p)=650 (2021Wa16)

Q-value: S(2n)=12066 syst 464, S(2p)=7428 syst 699 (2021Wa16)

XREF T1/2(level)
  0A 0.51 s +30-13 
% α = 100
% SF ≤ 12.5

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Additional Level Data and Comments:


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