228U     232PU A DECAY                                           14NDS    201403
228U   H TYP=FUL$AUT=KHALIFEH ABUSALEEM$CIT=NDS 116, 163 (2014)$CUT=31-Dec-2012$
232PU  P 0.0         0+                33.1 M    8              6716      10
228U   N                       0.23    6
228U  c  T{-1/2} measured in 2000La25 using |a-|a coincidence data. The source
228U 2c  was produced in the reaction {+233}U({+3}He,4n){+232}Pu
228U 3c  Others: T{-1/2}({+232}Pu)=34.1 min {I7} (1973Ja06),
228U 4c  36 min {I2} (1952Or03).
228U  c
228U  c  From x-ray and |a counts, the |e/|a branching ratio was
228U 2c  deduced by 1952Or03 as <60 (this ratio yields %|a>1.6) and an
228U 3c  approximate upper limit of 20% was estimated by 1973Ja06. The |a
228U 4c  branching of 20% was adopted by 1991Sc08. This branch, together with
228U 5c  I|a(6600|a)=62 per 100 |a decays, gives r{-0}=1.508.
228U  c  The r{-0} systematics suggests r{-0}({+228}U)=1.518 {I10} for the
228U 2c  nuclear radius parameter from which the |a branch of {+232}Pu is
228U 3c  calculated as 23% {I6} by requiring HF(6600|a)=1.0, if I|a(6600|a)=67%
228U 4c  {I5} of |a decays. By considering the consistencies between the
228U 5c  experimental observations and the |a systematics, %|a=23 {I6} is
228U xc  recommended here.
228U  c  The gross-|b calculations by 1973Ta30 predict T{-1/2}(|e)=5000 s which
228U 2c  yields %|e=40.9.
228U  c  The partial half-life of {+232}Pu |b{++} decay has been
228U 2c  calculated by 1997Mo25 as >100 s.
228U  c
228U  cA E         Measured by 1973Ja06.
228U  cA IA        |a intensity per 100 |a decays. The intensities given
228U 2cA here are calculated by requiring that HF(6542|a)=1.1 {I4}, obtained
228U 3cA from local systematics of hindrance factors of |a's to
228U 4cA the first 2+ states. The authors of 1973Ja06 estimated
228U 5cA I|a(6600|a to g.s.)|?62 from extrapolation of g.s. |a intensities from
228U 6cA other Pu isotopes; this intensity gives HF(2+ state)|?0.9, in
228U 7cA agreement with the value obtained from HF systematics.
228U  cA HF        r{-0}({+228}U)=1.518 {I10} for %|a=23 {I6} and
228U xcA I|a(6600|a)=67 {I5}%
228U  CL BAND(A)   K=0 GS BAND.
228U   L 0.0         0+                                                     A
228U   A 6600      10 67     5  1.000
228U   L 59        14  2+                                                   A
228U   A 6542      10 33     5   1.1   4