231U     235PU A DECAY (25.3 M)        1952OR03,1957TH10         22NDS    202210
231U   H TYP=FUL$AUT=Balraj Singh, Jagdish K. Tuli, and Edgardo Browne$
231U 2 H CIT=NDS 185, 560 (2022)$CUT=31-Aug-2022$
231U  c  1957Th10: {+235}Pu activity produced in {+233}U(|a,2n) and
231U 2c  {+235}U(|a,4n) at the Crocker Laboratory 60-inch cyclotron.
231U 3c  Measured E|a, %|a decay mode and half-life of {+235}Pu decay.
231U 4c  Except for the 5850 group, no other |a group with I|a|>5% found
231U 5c  in E|a=5.5-6.5 MeV range.
231U  c  Evaluators' note about the decay scheme: except for the energy and
231U 2c  approximate intensity of one |a transition, no other spectral
231U 3c  information is available in literature.
235PU  P 0           (5/2+)            25.3 M    5              5951      20
235PU cP J,T$From {+235}Pu Adopted Levels in the ENSDF database
235PU2cP (Feb 2014 update)
235PU cP QP$From 2021Wa16
231U   N                       0.000027 5
231U  cN BR$%|a=0.0027 {I5} for the decay of {+235}Pu from I(|a)/I(K| x ray) in
231U 2cN 1957Th10 and, |e(L+)/|e(K)(theory)=0.36. 1957Th10 gave partial
231U 3cN half-life of 1.7 y {I4}, and %|a=0.0030 {I6} using |e(L)/|e(K)=0.23.
231U 4cN Note that %|a=0.0028 {I7} in {+235}Pu Adopted Levels in the ENSDF
231U 5cN database (Feb 2014 update).
231U   L 0            (5/2-)
231U   L 0+X          (5/2+)
231U  cL E$x=40 {I40} from energy systematics of neighboring nuclides
231U   A 5850      20 100    AP
231U  cA E$from 1957Th10. Other: 5850 {I30} (1952Or03)
231U  cA IA$only one |a branch has been measured. Other: |?80 (1972El21,
231U 2cA systematics of |a decay)