ADOPTED LEVELS for 262Bh

Author: Y. Akovali |  Citation: Nucl. Data Sheets 94, 131 (2001) |  Cutoff date: 1-Aug-2001 

 Full ENSDF file | Adopted Levels (PDF version) 


S(n)= 6.7×103 keV SYS(p)= 8.E2 keV SYQ(α)= 10320 keV 15
Reference: 2012WA38

General Comments:

Theoretical studies:

For calculation of fission barrier, see 1985Cw01, 2000Ad15, 2001Mo07.

Partial half-life for SF decay was calculated by 1985Lo17, 2000Ho27.

Levels: Excited levels populated by 266Mt α decay are not adopted here because of possible multiple parent states with unknown level energies. See 266Mt α decay data set.

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




E(level)
(keV)
T1/2(level)
  0.0+X 102 ms 26 
% α ≤ 100
  0.0+Y 8.0 ms 21 
% α ≤ 100

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  0.0+X 102 ms 26 
% α ≤ 100
Level is populated in 266Mt α decay: the authors of 1997Ho14 observed that the 10682-, 10809- and 10848- keV α’s from 266Mt were correlated with the 9731-, 9831- and 10143- keV α’s from 262Bh, and pointed out that the three correlated α’s of 266Mt possibly decay from different 266Mt isomers.
E(level): Level is populated in 266Mt α decay: the authors of 1997Ho14 observed that the 10682-, 10809- and 10848- keV α’s from 266Mt were correlated with the 9731-, 9831- and 10143- keV α’s from 262Bh, and pointed out that the three correlated α’s of 266Mt possibly decay from different 266Mt isomers.
  0.0+Y 8.0 ms 21 
% α ≤ 100
One photon at 382.9 in coincidence with an escape-α from this state was observed by 1984Mu07, and because of the short correlation time between the 266Mt α decay and the α escape, 1989Mu09 suggested that the 8.0-ms state is probably the isomer. However, the 382.9γ has been tentatively reassigned to 258Db decay (private communication from S. Hofmann; March 2000).
E(level): One photon at 382.9 in coincidence with an escape-α from this state was observed by 1984Mu07, and because of the short correlation time between the 266Mt α decay and the α escape, 1989Mu09 suggested that the 8.0-ms state is probably the isomer. However, the 382.9γ has been tentatively reassigned to 258Db decay (private communication from S. Hofmann; March 2000).

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