251ES 251FM EC DECAY 1978Ah02 23NDS 202305
251ES H TYP=FUL$AUT=C. Morse$CIT=NDS 189, 111 (2023)$CUT=23-Sep-2022$
251ES c $ 1978Ah02: {+251}Fm produced by {+249}Cf(|a,2n); measured |g
251ES2c (Ge(Li)), ce (Si(Li)), |g|g.
251ES CL BAND(A)$|p3/2-[521]
251ES CL BAND(B)$|p7/2+[633]
251ES CL BAND(C)$|[|p7/2+[633]~#2{++}|]11/2+ |g-vibrational band
251ES cG RI(A)$Doublet with intensity divided based on |g|g coincidence
251ES2cG analysis. Combined intensity is 0.13 {I1}.
251ES cL E$No |g decay has been observed to the ground state of {+251}Es. The
251ES2cL level energies calculated here rely on the 5/2- member of the
251ES3cL |p3/2-[521] band having an energy of 31.7 {I2} keV. This value was
251ES4cL calculated in 1978Ah02 from the observed difference of 44.4 {I2} keV
251ES5cL in the energies of the |g rays depopulating the 461.4-keV level to
251ES6cL the 7/2- and 5/2- members of this band. All other level energies are
251ES7cL established relative to this level using a least-squares fit to the
251ES8cL |g-ray energies.
251ES cL J$From Adopted Levels.
251ES cG MR$Calculated with BrIccMixing version 2.3d, using measured
251ES2cG conversion coefficients in 1978Ah02 as inputs. Uncertainties for the
251ES3cG conversion coefficients, which were not reported in 1978Ah02, were
251ES4cG calculated from the I{-|g} and I{-ce} values reported.
251ES cG M$Based on the level scheme presented in 1978Ah02. Mixed multipoles
251ES2cG have been assumed except in cases where the J{+|p} values of the
251ES3cG initial and final states or the measured conversion coefficients
251ES4cG indicate only one multipole.
251ES cE TI$Calculated from |g-ray intensity balance.
251ES DG CC$FROM BrIcc v2.3b (16-Dec-2014) 2008Ki07, "Frozen Orbitals" appr.
251FM P 0 (9/2-) 5.30 H 8 1447 15
251FM cP QP$From 2021Wa16
251ES N 1.0 0.9820 13 1.01833
251ES G 786.3 5 0.008 2
251ES G 796.6 5 0.012 2
251ES G 826.8 5 5E-3 AP
251ES G 858.5 5 5E-3 AP
251ES G 1279.0 4 0.0036 4
251ES L 0 3/2- A
251ES2 L CONF=|p3/2-[521]
251ES L 8.30 24 (7/2)+ B
251ES2 L CONF=|p7/2+[633]
251ES E 0.0064 1180.6 166.744 15 80.6 16
251ES cE IB$Lacking any other information, the evaluator calculated the |b
251ES2cE feeding to this state assuming that it does not decay to the ground
251ES3cE state due to the very low energy and presumed M2 nature of the decay.
251ESS E EAV=216.9 71$CK=0.7389 4$CL=0.1910 3$CM+=0.07009 12
251ES L 31.70 20 5/2- A
251ES L 55.80 24 (9/2)+ B
251ES G 47.48 6 0.12 1 M1+E2 0.243 +25-27 125 9
251ESX G CEM=2.65 19$CEN=1.02 8$EMC=22 2$ENC=8.5 10
251ESS G LC=92 7$MC=24.1 18$NC=6.7 5$OC=1.73 13$PC=0.311 20$QC=0.01213 20
251ES E 12.7 167.51 6 12.7 16
251ESS E CK=0.7377 4$CL=0.1918 3$CM+=0.07047 13
251ES L 76.1 3 7/2- A
251ES L 114.04 25 (11/2+) B
251ES L 182.5 3 (13/2+) B
251ES L 263.0 4 (15/2+) B
251ES L 461.40 22 7/2-
251ES2 L CONF=|p7/2-[514]
251ES G 385.3 2 0.031 3 (M1+E2) 0.54 40
251ESX G CEK=0.021 7$EKC=0.68 24$EL1C+EL2C=0.1 AP
251ES cG $CEL1+CEL2 |? 0.003
251ESS G KC=0.39 34$LC=0.107 48$MC=0.027 11$NC=0.0076 30$OC=0.00197 81$
251ESS G PC=3.7E-4 17$QC=1.7E-5 14
251ES G 405.6 1 1.01 5 E1+M2 0.179 9 0.091 7
251ESX G CEK=0.060 5$CEL3=0.002 LT$CEM=0.005 AP$EKC=0.059 6$
251ES cG $CEL1+CEL2=0.020 2
251ESX G EL1C+EL2C=0.020 2$EL3C=0.002 LT$EMC=0.005 AP
251ESS G KC=0.066 5$LC=0.0187 15$MC=0.0048 4$NC=0.00136 11$OC=0.00035 3$
251ESS G PC=6.7E-5 6$QC=3.5E-6 3
251ES G 429.7 1 0.084 7 (M1+E2) 0.40 30
251ESX G CEK=0.039 8$EKC=0.46 10$EL1C+EL2C=0.13 2
251ES cG $CEL1+CEL2=0.0110 15
251ESS G KC=0.29 25$LC=0.078 38$MC=0.0196 86$NC=0.0055 24$OC=0.00142 64$
251ESS G PC=2.7E-4 13$QC=1.3E-5 10
251ES G 453.1 1 1.48 8 E1+M2 0.236 +17-18 0.100 12
251ESX G CEK=0.100 8$CEL3=0.003 LT$CEM=0.0090 14$CEN=0.004 1$
251ES cG $CEL1+CEL2=0.028 3
251ESX G EKC=0.068 7$EL1C+EL2C=0.019 2$EL3C=0.002 LT$EMC=0.006 1$ENC=0.0027 7
251ESS G KC=0.072 8$LC=0.0204 25$MC=0.0053 7$NC=0.00147 18$OC=0.00039 5$
251ESS G PC=7.3E-5 9$QC=3.9E-6 5
251ES E 2.84 117.834 24 2.84 11
251ESS E CK=0.7218 9$CL=0.2028 7$CM+=0.0754 3
251ES L 777.90 24 (9/2)+
251ES2 L CONF=|p9/2+[624]
251ES G 664.0 3 0.017 3 (M1+E2) 0.125 88
251ESX G CEK=0.0014 AP$EKC=0.08 AP
251ESS G KC=0.095 72$LC=0.023 13$MC=0.0056 30$NC=0.00157 82$OC=4.1E-4 22$
251ESS G PC=7.8E-5 43$QC=4.0E-6 29
251ES G 722.1 2 0.082 7 M1+E2 0.50 +28-35 0.142 25
251ESX G CEK=0.0092 10$EKC=0.11 2
251ESS G KC=0.110 21$LC=0.024 4$MC=0.0059 9$NC=0.00163 24$OC=0.00043 7$
251ESS G PC=8.2E-5 13$QC=4.6E-6 9
251ES G 769.6 1 0.40 2 M1 0.1429
251ESX G CEK=0.046 5$EKC=0.115 14
251ESS G KC=0.1117 16$LC=0.0234 4$MC=0.00573 8$NC=0.001592 23$OC=0.000417 6$
251ESS G PC=8.07E-5 12$QC=4.60E-6 7
251ES E 0.43 3 8.27 4 0.43 3
251ESS E CK=0.6925 23$CL=0.2229 16$CM+=0.0846 8
251ES L 889.06 24 (11/2)+ C
251ES2 L CONF=|[|p7/2+[633]~#2{++}|]11/2+
251ES G 706.3 2 0.025 3 (M1+E2) 0.106 74
251ESX G CEK=0.0030 9$EKC=0.12 4
251ESS G KC=0.081 60$LC=0.019 11$MC=0.0047 25$NC=0.00132 69$OC=3.4E-4 19$
251ESS G PC=6.6E-5 37$QC=3.4E-6 25
251ES G 775.0 1 0.088 AP (M1+E2) 0.084 57 @
251ESF G FLAG=A
251ESS G KC=0.064 46$LC=0.0148 82$MC=0.0037 20$NC=1.02E-3 54$OC=2.7E-4 15$
251ESS G PC=5.1E-5 29$QC=2.7E-6 19
251ES G 833.3 1 0.64 4 M1+E2 2.21 +40-28 0.039 4
251ESX G CEK=0.020 2$EKC=0.031 4$EL1C+EL2C=0.0068 9
251ES cG $CEL1+CEL2=0.0044 5
251ESS G KC=0.028 4$LC=0.0078 6$MC=0.00197 14$NC=0.00055 4$OC=0.000142 10$
251ESS G PC=2.66E-5 20$QC=1.21E-6 13
251ES G 880.8 1 2.23 11 E2 0.0209
251ESX G CEK=0.031 4$CEM=0.0033 6$EKC=0.014 2$
251ES cG $CEL1+CEL2=0.0096 10
251ESX G EL1C+EL2C=0.0043 5$EMC=0.0015 3
251ESS G KC=0.01447 21$LC=0.00476 7$MC=0.001231 18$NC=0.000344 5$OC=8.86E-5 13$
251ESS G PC=1.627E-5 23$QC=6.28E-7 9
251ES E 0.45 158.05 15 0.45 15
251ESS E CK=0.672 4$CL=0.2369 25$CM+=0.0910 12
251ES L 957.48 24 (13/2)+ C
251ES G 694.5 3 0.015 3 (M1+E2) 0.111 78
251ESX G CEK=0.009 AP$EKC=0.06 AP
251ESS G KC=0.084 63$LC=0.020 11$MC=0.0050 26$NC=0.00138 73$OC=3.6E-4 19$
251ESS G PC=6.9E-5 38$QC=3.5E-6 26
251ES cG $From the reported I{-|g} and I{-ce}, the K-conversion coefficient is
251ES2cG |a{-K}|?0.6. This is inconsisten with the reported value of
251ES3cG |a{-K}|?0.06.
251ES G 775.0 1 0.042 AP (M1+E2) 0.084 57 @
251ESF G FLAG=A
251ESS G KC=0.064 46$LC=0.0148 82$MC=0.0037 20$NC=1.02E-3 54$OC=2.7E-4 15$
251ESS G PC=5.1E-5 29$QC=2.7E-6 19
251ES G 843.4 1 0.12 1 M1+E2 0.72 +22-20 0.081 12
251ESX G CEK=0.0076 9$EKC=0.063 9
251ESS G KC=0.063 10$LC=0.0138 17$MC=0.0034 4$NC=0.00095 11$OC=0.00025 3$
251ESS G PC=4.8E-5 6$QC=2.6E-6 4
251ES G 901.6 1 0.13 1 E2 0.0200
251ESX G CEK=0.2 AP$EKC=0.01 AP
251ESS G KC=0.01392 20$LC=0.00449 7$MC=0.001158 17$NC=0.000323 5$OC=8.34E-5 12$
251ESS G PC=1.533E-5 22$QC=6.00E-7 9
251ES cG $From the reported I{-|g} and I{-ce}, the K-conversion coefficient is
251ES2cG |a{-K}|?1.5. This is inconsistent with the reported value of
251ES3cG |a{-K}|?0.01.
251ES L 1238.90 24 (11/2)+
251ES2 L CONF=|[|n9/2-[734]~#|n1/2+[620]~#|p3/2-[521]|]11/2+
251ES G 281.4 1 0.072 5 M1 2.24
251ESX G CEK=0.12 1$CEM=0.0084 14$EKC=1.67 18$
251ES cG $CEL1+CEL2=0.029 3
251ESX G EL1C+EL2C=0.40 5$EMC=0.12 2
251ESS G KC=1.741 25$LC=0.371 6$MC=0.0914 13$NC=0.0254 4$OC=0.00666 10$
251ESS G PC=0.001288 18$QC=7.36E-5 11
251ES G 349.9 1 0.84 4 M1 1.223
251ESX G CEK=0.84 6$CEL3=0.002 LT$CEM=0.051 5$CEN=0.023 3$
251ES cG $CEL1+CEL2=0.210 15
251ESX G EKC=1.0 1$EL1C+EL2C=0.25 2$EL3C=0.003 LT$EMC=0.061 7$ENC=0.027 4
251ESS G KC=0.953 14$LC=0.202 3$MC=0.0498 7$NC=0.01384 20$OC=0.00363 5$
251ESS G PC=0.000702 10$QC=4.00E-5 6
251ES G 461.0 1 0.092 6 (M1+E2) 0.33 25
251ESX G EL1C+EL2C=0.087 22
251ES cG $CEL1+CEL2=0.008 2
251ESS G KC=0.24 21$LC=0.063 32$MC=0.0160 73$NC=0.0044 21$OC=0.00116 54$
251ESS G PC=2.2E-4 11$QC=1.05E-5 82
251ES G 1056.2 4 0.006 1 (M1+E2) 0.038 23
251ESS G KC=0.029 19$LC=0.0065 35$MC=0.00160 83$NC=4.4E-4 23$OC=1.16E-4 61$
251ESS G PC=2.2E-5 12$QC=1.20E-6 76
251ES G 1124.9 2 0.028 3 (M1+E2) 0.032 19
251ESS G KC=0.025 16$LC=0.0055 29$MC=0.00135 69$NC=3.8E-4 19$OC=9.8E-5 51$
251ESS G PC=1.89E-5 99$QC=1.02E-6 63
251ES G 1183.0 2 0.074 5 (M1+E2) 0.028 17
251ESS G KC=0.022 13$LC=0.0048 25$MC=0.00119 60$NC=3.3E-4 17$OC=8.6E-5 44$
251ESS G PC=1.65E-5 86$QC=9.0E-7 54
251ES G 1230.6 2 0.14 1 E2 0.01111
251ESS G KC=0.00823 12$LC=0.00214 3$MC=0.000539 8$NC=0.0001502 21$OC=3.89E-5 6$
251ESS G PC=7.29E-6 11$QC=3.34E-7 5
251ES E 2.43 9 6.08 12 2.43 9
251ESS E CK=0.31 7$CL=0.48 5$CM+=0.210 23
251ES L 1264.90 24 (11/2)+
251ES cL $Interpreted as a three-quasiparticle state, but a configuration
251ES2cL could not be definitively assigned. The most likely configuration is
251ES3cL stated to be |[|n9/2-[734]~#|n5/2+[622]~#|p3/2-[521]|]11/2+.
251ES G 307.4 1 0.036 3 (M1+E2) 1.01 74
251ESX G CEK=0.043 4$CEM=0.0070 14$EKC=1.19 15$
251ES cG $CEL1+CEL2=0.011 2
251ESX G EL1C+EL2C=0.31 6$EMC=0.19 4
251ESS G KC=0.72 65$LC=0.214 77$MC=0.055 17$NC=0.0153 46$OC=0.0040 13$
251ESS G PC=7.3E-4 28$QC=3.2E-5 26
251ES G 375.8 1 0.37 2 M1 1.005
251ESX G CEK=0.340 24$CEM=0.020 2$CEN=0.006 1$EKC=0.92 8$
251ES cG $CEL1+CEL2=0.071 7
251ESX G EL1C+EL2C=0.19 2$EMC=0.054 6$ENC=0.016 3
251ESS G KC=0.783 11$LC=0.1661 24$MC=0.0408 6$NC=0.01136 16$OC=0.00297 5$
251ESS G PC=0.000575 8$QC=3.28E-5 5
251ES G 487.1 2 0.011 2 (M1+E2) 0.28 21
251ESS G KC=0.21 18$LC=0.054 28$MC=0.0136 64$NC=0.0038 18$OC=9.8E-4 47$
251ESS G PC=1.86E-4 96$QC=9.1E-6 70
251ES G 1151.0 2 0.015 2 (M1+E2) 0.030 18
251ESS G KC=0.023 15$LC=0.0052 27$MC=0.00127 65$NC=3.5E-4 18$OC=9.3E-5 47$
251ESS G PC=1.78E-5 93$QC=9.6E-7 59
251ES G 1209.1 2 0.035 3 (M1+E2) 0.027 16
251ESS G KC=0.021 13$LC=0.0045 23$MC=0.00112 56$NC=3.1E-4 16$OC=8.1E-5 41$
251ESS G PC=1.56E-5 81$QC=8.5E-7 51
251ES G 1256.6 2 0.065 5 E2 0.01069
251ESS G KC=0.00794 12$LC=0.00204 3$MC=0.000514 8$NC=0.0001431 20$OC=3.71E-5 6$
251ESS G PC=6.96E-6 10$QC=3.21E-7 5
251ES E 0.93 5 6.30 13 0.93 5
251ESS E CK=0.19 9$CL=0.56 6$CM+=0.25 3
251ES L 1301.3 3 (7/2+,9/2,11/2)
251ES G 1245.6 4 0.0062 6
251ES G 1293.0 3 0.038 3
251ES E 0.043 3 7.32 14 0.043 3
251ESS E CK=0.01 7$CL=0.67 4$CM+=0.32 3
251ES L 1307.0 3 (7/2+,9/2,11/2+)
251ES G 1193.0 2 0.009 1
251ES G 1251.2 2 0.0190 16
251ES G 1298.8 3 0.042 3
251ES E 0.069 3 7.07 13 0.069 3
251ESS E CK=0.00 5$CL=0.670 22$CM+=0.330 22
251ES L 1356.9 3 (7/2+,9/2,11/2+)
251ES G 1242.8 4 0.0052 5
251ES G 1301.2 3 0.010 1
251ES G 1348.6 3 0.0033 3
251ES E 0.0182 117.18 22 0.0182 11
251ESS E CL=0.62 4$CM+=0.38 4