ADOPTED LEVELS for 261Sg

Author: Agda Artna-cohen |  Citation: Nucl. Data Sheets 88, 155 (1999) |  Cutoff date: 31-Jul-1999 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-5.13×103 keV SYS(n)= 6.61×103 keV 3S(p)= 2.96×103 keV SYQ(α)= 9714 keV 15
Reference: 2012WA38

References:
  A  265Hs α decay (2.0 MS)  B  265Hs α decay (0.75 MS)

General Comments:

Calculations, compilations:

Favored α decay: 1993Bu09

g.s. properties: 1997Mo25, 1995Mo29

Pion decay: 1991Io03

Single-particle Nilsson levels: 1994Cw02

1994Cw02 calculate the following single-particle level sequence: g.s. 1/2[620], 0.02 MeV 3/2[622], 0.03 MeV 11/2[725], 0.07 MeV 7/2[613], 0.29 MeV 9/2[615], 0.87 MeV 9/2[734]

Assignment: 208Pb(54Cr,n) 4.8 to 5.0 MeV/α, α correlation with daughter 257Rf and granddaughter 253No (1985Mu11,1984Mu17). 208Pb(58Fe,n)265Hs E=5.04 2 MeV/α, daughter of 265Hs, parent of 257Rf (1987Mu15). 208Pb(54Cr,n) E=5.5 MeV/α, α’s observed (1984Og03).

1997Ho13, 1997Ho03 report a 34 ms 9.468 MeV α in the decay chain from 269110 and assign it to 261Sg.

Q-value: Note: Current evaluation has used the following Q record

Q-value: Estimated ΔQ(β-)=400, ΔS(n)=300, ΔS(p)=400, ΔQ(α)=70 (1995Au04)





E(level)
(keV)
XREF T1/2(level)
    0.0AB 0.23 s 6 
% α ≈ 100
% SF < 1
   56 21 A   
  127 21 A   
  156 21  B  
  185 21 A   
  212 21  B  
  396 21  B  

E(level): From 265Hs decays. Based on the assumption that the highest energy α group from 265Hs goes to the g.s. of 261Sg.

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    0.0 0.23 s 6 
% α ≈ 100
% SF < 1
Both 265Hs isomers seem to feed the g.s. of 261Sg. No significant difference is observed between the Eα and T1/2 of the daughter, 261Sg, from the decay of either 265Hs isomer (1999He11).
E(level): Both 265Hs isomers seem to feed the g.s. of 261Sg. No significant difference is observed between the Eα and T1/2 of the daughter, 261Sg, from the decay of either 265Hs isomer (1999He11).

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