Author: C. Morse |  Citation: Nucl. Data Sheets 182, 130 (2022). |  Cutoff date: 14-Sep-2021 

 Full ENSDF file | Adopted Levels (PDF version) 

S(p)= 1082 keV SYQ(α)= 1.178×104 keV 5
Reference: 2021WA16

General Comments:

$ One possible observation of 267Ds was reported in 1995Gh05. However, there were a number of issues that make the identification of the event uncertain. An equipment failure rendered the daughter decay invisible. In addition, there were two consecutive implantation events, which complicates the interpretation of subsequent decays. Finally, the proposed decay scheme relies on the existence of unobserved electron-capture decay branches. Therefore, the assignment of this event to 267Ds is considered tentative.

$ 1995Gh05 requires that the electron-capture decay branch of 259Sg to 259Ha be 10-35% in order to explain the observed decay-chain candidate. However, 2015An05 determined that the electron-capture decay branch of 259Hs is <1%.

$ 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(p)=225 (2021Wa16)

Q-value: S(2p)=1599 syst 205, Q(εp)=5451 syst 205 (2021Wa16)

  0 3 µs +13-1 
% α = 100

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Additional Level Data and Comments:


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