254ES 258MD A DECAY (51.50 D) 1993MO18 19NDS 201902
254ES H TYP=FUL$AUT=BALRAJ SINGH$CIT=NDS 156, 1 (2019)$CUT=31-Jan-2019$
254ES c 1993Mo18: measured E|a, I|a, E|g, I|g, |a|g-coin
254ES c 2007Sa02: theoretical structure analysis based on particle plus rotor
254ES2c model and Gallagher-Moszkowski rules, assigned J|p and bands
254ES cA E,IA$From 1993Mo18. I|a values have been normalized here such that
254ES2cA summed I|a=100, excluding those for E|a|>6800 where only upper limits
254ES3cA were given. Other measurements: 1980Ho04, 1970Fi12, 1968Hu06. Possible
254ES4cA additional |a groups: 6800-6980 keV, I|a|<5.4; 7000-7040 keV, I|a|<1.0;
254ES5cA 7090-7140 keV, I|a|<0.20. The relative intensities listed in 1993Mo18
254ES6cA are |<0.082, |<0.015 and |<0.003, respectively
254ES cA IA(W)$Since contributions from conversion-electron summing could
254ES2cA not be estimated for these |a groups, only upper limits were given by
254ES3cA 1993Mo18
254ES cA HF$r{-0}({+254}Es)=1.49 {I1} is used in deducing hindrance factors
254ES cG $The decay scheme given here is basically that proposed by 1993Mo18,
254ES2cG based on levels populated by |a transitions and |g data. Exceptions
254ES3cG are for J|p assignments, which in some cases are different from those
254ES4cG in 1993Mo18. Evaluator considers the decay scheme as incomplete,
254ES5cG since information about multipolarities and mixing ratios is generally
254ES6cG missing. There is also a serious problem with a non-physical negative
254ES7cG transition intensity balance at the 171-keV level
254ES tG $---------------------------------------------------------------------
254ES tG Einsteinium x-ray energies and intensities (1993Mo18)
254ES2tG
254ES3tG E(x-ray) I(x-ray)
254ES4tG relative to I|g(367.8|g)=100
254ES4tG -------- ---------------------------
254ES5tG 112.4 {I2} 2.2 {I3} K|a{-2} x-ray
254ES6tG 117.9 {I2} 3.6 {I4} K|a{-1} x-ray
254ES7tG 133.4 {I4} 1.3 {I3} K|b{-1} x-ray
254ES+tG +K|b{-3} x-ray
254ES8tG 136.8 {I3} 0.7 {I3} K|b{-2} x-ray
254ES tG $---------------------------------------------------------------------
254ES cG E,RI$From 1993Mo18. Gammas were observed in coincidence with |a.
254ES cG M(a)$From 1993Mo18, based on weakness of the observed intensity of
254ES2cG K x-rays.
254ES cG E(X)$The ordering of the 189.1-214.7 |g cascade is not established
254ES cL E$From least-squares fit to E|g values
254ES cL J$From Adopted Levels. Assignments proposed by 1993Mo18 are given
254ES2cL under comments. Also assignments proposed in the theoretical analysis
254ES3cL by 2007Sa02 are considered
254ES cL BAND(A)$K|p=(7+) band.
254ES2cL Configuration=|p7/2[633]~#|n7/2[613] (1993Mo18)
258MD P 0.0 (8-) 51.50 D 29 7271.3 19
258MD cP J,T$From {+258}Md Adopted Levels in the ENSDF database (August 2017
258MD2cP update). Proposed configuration=|p7/2[514]+|n9/2[615], K|p=8-
258MD cP QP$From 2017Wa10
254ES N 0.381 21 1
254ES cN NR$From summed transition intensity from 448 level normalized to
254ES2cN I|a=65.8% {I13}
254ES cN BR$%|a=100 for {+258}Md |a decay
254ES PN 3
254ES G 56.7 2 0.54 13
254ES L 0.0 (7+) 275.7 D 5 A
254ES cL T$from Adopted Levels
254ES A 7159 2 0.20 LE 5.3E+4 GE W ?
254ES cA $Relative I|a<0.003 (1993Mo18)
254ES L 80.1 1 (8+) A
254ES cL J$large lower limit for HF is consistent with 8+ member of g.s.
254ES2cL rotational band, however, other possibilities are not excluded.
254ES A 7080 2 0.20 LE 2.5E+4 GE W ?
254ES cA $Relative I|a=0.003 (1993Mo18)
254ES G 80.1 2 2.43 23 (M1+E2) 1.25 25 49 6
254ES cG M,MR$deduced by evaluator from transition intensity balance
254ES2cG at 80.1 level
254ESS G LC=35 4 $MC=9.9 12$NC=2.8 4$OC=0.70 9$PC=0.115 13$QC=0.00127 25
254ES L 171.1 1 (9+) A
254ES cL J$large lower limit for HF is consistent with 9+ member of g.s.
254ES2cL rotational band.
254ES cL $Note that there is a large non-physical negative transition
254ES2cL intensity balance at the 171-keV level.
254ES A 6990 2 0.20 LE 1.0E+4 GE W ?
254ES cA $Relative I|a<0.003 (1993Mo18)
254ES G 91.0 3 0.30 18[M1+E2] 25 13
254ESS G LC=18.2 89$MC=5.0 28
254ESS G NC=1.42 78$OC=0.36 19$PC=0.060 28$QC=0.00109 79
254ES G 171.1 2 1.14 37[E2] 2.30
254ESS G KC=0.1482 21$LC=1.546 23$MC=0.441 7
254ESS G NC=0.1246 19$OC=0.0313 5$PC=0.00509 8$QC=3.22E-5 5
254ES L 214.7 2 ?
254ES cL J$6- bandhead (1993Mo18) with configuration=|p3/2[521]~#|n9/2[615],
254ES2cL but 2007Sa02 analysis did not support this assignment, as the
254ES3cL calculated energy for the bandhead for this configuration is above
254ES4cL 350 keV
254ES G 214.7 2 1.16 46[D,E2] 2.5 24 X ?
254ES cG M$[E1] implied by J|p assignments in 1993Mo18
254ES cG $See comment for 189.1|g about placement of this transition.
254ES L 289.9 3 (7+) ?
254ES cL J$1993Mo18 suggested 7- member of K|p=6- band
254ES L 376.8 1 (8+)
254ES cL $The gamma decay of this level is not fully known
254ES cL J$8- member of 6- band (1993Mo18), but 8+ in the theoretical analysis
254ES2cL by 2007Sa02 with configuration=|p7/2[633]~#|n9/2[615]
254ES A 6788 2 9.9 10 28 3
254ES cA $Relative I|a=0.151 {I15} (1993Mo18)
254ES G 86.9 2 0.56 15 (M1+E2) 30 17 ?
254ES2 G ECC=31 16
254ES cG M$from |a(exp), deduced by evaluator from intensity balance at
254ES2cG 376.8 level
254ESS G LC=22 12$MC=6 4$NC=1.7 10$OC=0.44 25$
254ESS G PC=0.07 4$QC=0.0013 9
254ES G 205.7 2 1.21 43 [M1+E2] 3.2 22
254ES cG M$[E1] implied by J|p assignments in 1993Mo18
254ESS G KC=2.2 21$LC=0.80 10$MC=0.210 12
254ESS G NC=0.059 3$OC=0.0151 10$PC=0.0027 4$QC=0.00010 8
254ES G 296.7 2 5.4 9 [M1+E2] 1.1 9
254ES cG M$[E1] implied by J|p assignments in 1993Mo18
254ESS G KC=0.8 7$LC=0.24 9$MC=0.052 18
254ESS G NC=0.017 5$OC=0.0044 13$PC=0.008 3$QC=4E-5 3
254ES G 376.8 4 1.72 67 [M1+E2] 0.6 5
254ES cG M$[E1] implied by J|p assignments in 1993Mo18
254ESS G KC=0.42 35$LC=0.11 5$MC=0.029 12
254ESS G NC=0.008 4$OC=0.0021 9$PC=0.00039 18$QC=1.8E-5 15
254ES L 403.8 3 (7-)
254ES cL $The gamma decay of this level is largely unknown
254ES cL J$(7-,8-) (1993Mo18); 7- in the theoretical analysis
254ES2cL by 2007Sa02 with configuration=|p7/2[514]~#|n7/2[613]
254ES A 6763 4 20.8 12 10.2 7
254ES cA $Relative I|a=0.316 {I18} (1993Mo18)
254ES G 189.1 2 0.99 39[D,E2] 3.5 34 X ?
254ES cG M$[M1+E2] implied by J|p assignments in 1993Mo18
254ES cG $Placement of this transition based on energy sum of 189.1+214.7
254ES2cG gammas, also supported by nearly balance intensities of the two
254ES3cG transitions in a cascade, however the ordering of the two transitions
254ES4cG is not established
254ES L 447.9 1 (8-)
254ES A 6718 2 65.8 13 2.1 1
254ES cA $Relative I|a=1.000 {I19} (1993Mo18)
254ES G 71.1 1 8.0 5 (E1) 0.366
254ES cG M$from intensity balance considerations at 447.9 and 376.8 levels,
254ES2cG mult=E1 is more consistent than either M1 or E2
254ESS G LC=0.273 4$MC=0.0686 10
254ESS G NC=0.0189 3$OC=0.00469 7$PC=0.000742 11$QC=2.15E-5 3
254ES G 276.8 1 20.2 19(E1) 0.0556 a
254ESS G KC=0.0430 6$LC=0.00941 14$MC=0.00231 4
254ESS G NC=0.000639 9$OC=0.0001642 23$PC=2.97E-5 5$QC=1.293E-6 19
254ES G 367.8 1 100.0 69(E1) 0.0308 a
254ESS G KC=0.0241 4$LC=0.00501 7$MC=0.001227 18
254ESS G NC=0.000339 5$OC=8.74E-5 13$PC=1.605E-5 23$QC=7.47E-7 11
254ES G 447.9 1 36.6 38(E1) 0.0209 a
254ESS G KC=0.01645 23$LC=0.00331 5$MC=0.000808 12
254ESS G NC=0.000223 4$OC=5.77E-5 8$PC=1.069E-5 15$QC=5.18E-7 8
254ES L 469.2 2
254ES cL J$9- member of 6- band (1993Mo18)
254ES A 6697 2 3.4 14 32 14
254ES cA $Relative I|a=0.052 {I21} (1993Mo18)
254ES G 298.1 3 1.89 56[D,E2] 0.98 93
254ES cG M$[E1] implied by J|p assignments in 1993Mo18
254ES G 389.1 2 4.0 9 [D,E2] 0.47 44
254ES cG M$[E1] implied by J|p assignments in 1993Mo18