251CF 251BK B- DECAY 1984Li05 23NDS 202305
251CF H TYP=FUL$AUT=C. Morse$CIT=NDS 189, 111 (2023)$CUT=23-Sep-2022$
251CF c 1984Li05: Bk source from {+248}Cm({+18}O,X), chem; measured |g (Ge
251CF2c detector), |b(pc, plastic scin)
251CF c Others: 1970HoZN, 1967Di02
251CF c Level scheme is from 1984Li05 and agrees with the level scheme
251CF2c deduced from {+255}Fm |a decay.
251CF cL E$From 1984Li05
251CF cL J$From adopted levels
251CF cB $I(|b{+-})/I|g(177.7)|?33 (I|b{+-} measured with pc, the presence of
251CF2cB ce intensity was ignored) (1984Li05).
251CF cG $K| x ray/I|g(177.7)=6.67 {I33} (1984Li05).
251CF cG E,RI$From 1984Li05
251CF cG M$From adopted gammas
251CF cB $Because the |g rays connecting the levels in the ground band were
251CF2cB not observed, the |b feeding to the ground state includes the feeding
251CF3cB to the 25-keV and 48-keV levels as well.
251CF DG CC$FROM BrIcc v2.3e (17-Jun-2020) 2008Ki07, "Frozen Orbitals" appr.
251BK P 0 (3/2-) 56 M 1 1093 10
251BK cP QP$From 2021Wa16
251CF N 0.060 4 1.0 1.0
251CF cN NR$Deduced by evaluator, based on the measured I|g, level scheme, and
251CF2cN the 90% {I5} |b{+-} branch to the 178 level reported in 1984Li05.
251CF PN 3
251CF L 0 1/2+
251CF2 L CONF=|n1/2+[620] (1984Li05)
251CF B 305 AP 7.5 AP
251CFS B EAV=350.6 37
251CF cB E$1130 keV from F-K plot (1984Li05)
251CF L 25 3/2+
251CF G 25 M1+E2 5E+3 5 S
251CFS G LC=2.9E+3 29$MC=1.8E+3 17$NC=5E+2 5$OC=1.3E+2 12$PC=20 19$QC=0.070 6
251CF L 48 5/2+
251CF G 23 (M1+E2) 8E+3 8 S
251CFS G LC=4E+3 4$MC=2.7E+3 26$NC=8E+2 7$OC=1.9E+2 18$PC=30 28$QC=0.0946 33
251CF G 48 E2 725 10 S
251CFS G LC=522 7$MC=148.8 21$NC=41.8 6$OC=10.33 14$PC=1.621 23$QC=0.00381 5
251CF L 178 3/2+
251CF2 L CONF=|n3/2+[622] (1984Li05)
251CF G 130 58 12 M1 4.00 6
251CFS G LC=2.99 4$MC=0.736 10$NC=0.2039 29$OC=0.0529 7$PC=0.01023 14$
251CFS G QC=0.000602 8
251CF cG E$from E(level), |g is masked by K|b{-1} x ray (E(K|b{-1} x
251CF2cG ray)=130.85)
251CF cG RI$deduced by 1984Li05 from an excess of K|b{-1} x ray (K|b{-1} x
251CF2cG ray/K|a{-1}| x ray=0.53 {I4} (measured)=0.343 (theory)) and K|a{-1}|
251CF3cG x ray/I|g(178|g)=3.19 {I14}
251CF G 153 38.5 25 M1 11.32 16
251CFS G KC=8.81 12$LC=1.876 26$MC=0.461 6$NC=0.1278 18$OC=0.0332 5$
251CFS G PC=0.00641 9$QC=0.000377 5
251CF G 178 100 M1+E2 0.44 8 6.47 30
251CFS G KC=4.84 29$LC=1.214 17$MC=0.306 5$NC=0.0849 13$OC=0.02187 32$
251CFS G PC=0.00411 6$QC=0.000209 11
251CF cG MR$From {+251}Es |e decay.
251CF B 1090 5 5.93 3
251CFS B EAV=286.4 36
251CF cB E$915 keV from F-K plot (1984Li05)
251CF cB IB$from 1984Li05
251CF L 212 5/2+
251CF G 164 6.0 12 [M1] 9.30 13
251CFS G KC=7.24 10$LC=1.539 22$MC=0.378 5$NC=0.1048 15$OC=0.0272 4$
251CFS G PC=0.00525 7$QC=0.000309 4
251CF G 186.8 3.0 6 [M1] 6.44 9 S
251CFS G KC=5.02 7$LC=1.062 15$MC=0.261 4$NC=0.0723 10$OC=0.01877 26$
251CFS G PC=0.00363 5$QC=0.0002129 30
251CF cG E,RI$from adopted gammas
251CF B 5 AP 7.1 AP
251CFS B EAV=274.3 36
251CF cB IB$from intensity balance in level scheme