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

 Full ENSDF file | Adopted Levels (PDF version) 

S(n)= 6885 keV SYS(p)= 1605 keV SYQ(α)= 1.151×104 keV 3
Reference: 2021WA16

General Comments:

$ 269Ds has been observed in the 208Pb(62Ni,n) reaction at GSI (1995Ho03). Events were identified based on the observation of chains of α-decaying nuclei, correlated in time and position. Comparison of the decay properties of the chains with the literature allowed individual decays to be assigned to specific nuclei.

$ The data from 1995Ho03 was reanalyzed in 2002Ho11, and the left-most event in Fig. 5 was 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)=303, ΔS(p)=235 (2021Wa16)

Q-value: S(2n)=15188 syst 206, S(2p)=2401 syst 100, Q(εp)=4578 syst 302 (2021Wa16)

  0 0.18 ms +21-6 
% α = 100
% SF ≤ 25

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Additional Level Data and Comments:


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