Author: C.D. Nesaraja |  Citation: Nucl. Data Sheets 130, 183 (2015) |  Cutoff date: 30-Sep-2015 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=-4540 keV SYS(n)= 6740 keV SYS(p)= 3630 keV SYQ(α)= 7660 keV SY
Reference: 2012WA38

General Comments:

Experimental Studies:

2010AsZX: Determined t1/2 of 241Cf from decay curve analysis

1970Si19: 241Cf identified through 234U,(12C,5n). Alpha spectrum was measured with a Si(Au) detector.

1967Nu01: Studied α decay of 245Fm

Theoretical/Systematical Studies:

2013Is13: Prediction of spins from systematic studies of preformation probability for α decay and the neutron number of parent

Q-value: Δ(Q(β-))=280, Δ(S(n))=170, Δ(S(p))=220 and Δ(Q(α))=150 (syst, 2012Wa38)

Jπ(level) T1/2(level)
     0.0 (7/2-) 3.78 m 70 
% ε ≈ 75
% α ≈ 25
  ≈155 (1/2+)  

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Additional Level Data and Comments:

     0.0(7/2-) 3.78 m 70 
% ε ≈ 75
% α ≈ 25
The electron-capture branch has not been observed. The 7342α from 241Cf is assumed by the evaluator to be a favored transition with HF=2.0. This gives %α≈25 and thus %ε+%β+≈75.

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