ADOPTED LEVELS, GAMMAS for 240Cm

Authors: Balraj Singh, E. Browne |  Citation: Nucl. Data Sheets 109, 2439 (2008) |  Cutoff date: 31-Jul-2008 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-3.94×103 keV SYS(n)= 7.49×103 keV 6S(p)= 4955.6 keV 24Q(α)= 6397.8 keV 6
Reference: 2012WA38

References:
  A  240Bk ε decay (4.8 M)  B  244Cf α decay (19.4 M)

General Comments:

2004Na01: Measured yields of fission fragments and deduced charge distribution.

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

Q-value: ΔQ(β-)=150, ΔS(n)=100 (syst,2003Au03)








E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
M(γ)
      0AB 0+ 27 d 1 
% SF = 3.9×10-6 8
% α > 99.5
% ε < 0.5
  
     38 5  B (2+) 132 ps 9    38 5 S
[E2]
  ≈2000   10 ps 3 
% SF ≤ 100
  
  ≈3000   55 ns 12 
% SF ≈ 100
  

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
     38 (2+) 132 ps 9    38 5 [E2]2.4×103B(E2)(W.u.)=2.5×102 23, α=2.4E3 14, α(L)=1.7E3 10, α(M)=4.9E2 28, α(N)=1.4E2 8, α(O)=33 19, α(P)=5 3, α(Q)=0.010 9

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      00+ 27 d 1 
% SF = 3.9×10-6 8
% α > 99.5
% ε < 0.5
%ε<0.5 since no 240Am detected (1952Hi11).

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