Authors: Balraj Singh, Jagdish K. Tuli, and Edgardo Browne |  Citation: Nucl. Data Sheets 185, 560 (2022) |  Cutoff date: 31-Aug-2022 

 Full ENSDF file | Adopted Levels (PDF version) 

S(n)= 6695 keV 26S(p)= 4220 keV 60Q(α)= 6839 keV 20
Reference: 2021WA16

  A  235Cm α decay (5.0 M) 

General Comments:

1999La14: 231Pu produced in 233U(3He,5n),E=42-47 MeV; followed by chemical separation. Measured Eα; αα-correlations between the parent nucleus and the descendant nuclei to identify 231Pu. The measured activities from the α-decay chains: 231Pu |) 227U |) 223Th |) 219Ra |) 215Rn, and 231Np |) 227Pa |) 223Ac |) 219Fr |) 215At, the latter from 231Pu ε decay. The 6.72 MeV α-particle group from 231Pu α decay was only partially resolved from other lines in the spectrum

1985Ar25, 1985Po09: 197Au(40Ar,dα),E=60 MeV/nucleon; measured measured dα(θ), azimuthal (particle)(particle)(|f)

Theoretical calculations: consult the NSR database ( for 18 primary references dealing with half-lives and other aspects of radioactive decays, and two for nuclear structure. These references are listed in ’document’ records, which can be accessed through on-line ENSDF database at

Q-value: S(2n)=15230 60, S(2p)=7480 23, Q(ε)=2680 60 (2021Wa16)

XREFJπ(level) T1/2(level)
    0A (3/2+) 8.6 m 5 
% ε = 90 +3-7
% α = 10 +7-3
  324 28 ?A  

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Additional Level Data and Comments:


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