138CS 138XE B- DECAY (14.14 M) 1974CA02,1975SCZZ 17NDS 201711
138CS H TYP=FUL$AUT=JUN CHEN$CIT=NDS 146, 1 (2017)$CUT=30-Sep-2017$
138CS DG CC$FROM BrIcc v2.3a (10-Sep-2014) 2008Ki07, "Frozen Orbitals" appr.
138CS CG MR$IF NO VALUE GIVEN IT WAS ASSUMED MR=1.00 FOR E2/M1,
138CS2CG MR=1.00 FOR E3/M2 AND MR=0.10 FOR THE OTHER MULTIPOLARITIES
138CS c 1974Ca02,1975ScZZ: source of {+138}Xe was produced from fission of
138CS2c {+235}U induced by neutron flux from the Ames Laboratory research
138CS3c reactor. |g rays were detected with a pair of Ge(Li) detectors, a
138CS4c NaI(Tl) crystal, a Ge(Li) planar low-energy photon spectrometer and a
138CS5c Si(Li) detector; |b particles were detected with a well-type plastic
138CS6c scintillation detector. Measured E|g, I|g, E|b, |b|g-coin, |g|g-coin.
138CS7c Deduced levels, J, |p, |b-decay branching ratios, log {Ift} values,
138CS8c configurations. Comparisons with available data and shell-model
138CS9c calculations. Observed about 100 |g rays that belong to {+138}Cs.
138CSac Values of |g-ray intensities from 1975ScZZ supersede those from
138CSbc 1974Ca02. 1974Ca02 supersedes 1972CaYY.
138CS c 1972Mo33: source of {+138}Xe was produced from fission of {+235}U.
138CS2c |g and x rays were detected with Ge(Li) and Si(Li) detectors; |b
138CS3c particles and conversion electrons were detected with a |b detector.
138CS4c Measured E|g, I|g, |b|g-coin, |g|g-coin, E|b, I|b, E(ce), I(ce).
138CS5c Deduced levels, J, |p, |b-decay branching ratios, log {Ift}. Observed
138CS6c 62 |g rays for {+138}Cs.
138CS c 1973Ac01: source of {+138}Xe was produced from fission of {+235}U
138CS2c induced by thermal neutrons from the Buenos Aires isotope separator
138CS3c on-line facility. |g rays were detected with a Si(Li) detector (low
138CS4c energy |g and x rays) and Ge(Li) detectors (medium and high energy |g);
138CS5c |b particles and conversion electrons were detected with a solid-state
138CS6c detector. Measured E|g, I|g, E|b, E(ce), I(ce), |b|g-coin, |g|g-coin.
138CS7c Deduced levels, J, |p, conversion coefficients, |g-ray multipolarities,
138CS8c |b-decay branching ratios, log {Ift}. Observed 55 |g rays for {+138}Cs.
138CS9c 1974Ac02 re-determined the intensities for part of |g rays in 1973Ac01
138CSac using a new efficiency calibration for Ge(Li) detectors.
138CS c 2013Xi08: Sources was homogeneous sources of {+138}Xe-{+138}Cs.
138CS2c |g rays were detected with a HPGe detector. Measured E|g, I|g.
138CS3c Deduced {+138}Xe activity, absolute |g-ray emission probabilities in
138CS4c {+138}Xe |b{+-} decay.
138CS c Other: 1969Na01
138CS c The total average radiation energy released by {+138}Xe |b{+-} decay
138CS2c is 2967 keV {I146} (calculated by evaluator using the computer program
138CS3c RADLST). This value agrees well with Q(|b{+-})=2915 keV {I10}
138CS4c (2017Wa10) and shows the completeness of the decay scheme.
138CS c Level scheme is taken from 1974Ca02.
138CS cB IB$From I(|g+ce) intensity balance at each level, with conversion
138CS2cB coefficients calculated using the BrIcc program.
138CS cG E,RI$Quoted values of E|g are from 1974Ca02 and values of I|g are
138CS2cG from 1975ScZZ, unless otherwise noted. Data are also available in
138CS3cG 1972Mo33 and 1973Ac01 that agree well with quoted values but less
138CS4cG precise and complete. Quoted values of I|g are relative intensities
138CS5cG normalized to I|g(258.31|g)=1000.
138CS cG M$From |a(K)exp data of 1973Ac01 (except for 10.85|g)
138CS2cG normalized to |a(K)(E2)=0.00074 for the 1436|g in {+138}Cs |b{+-}
138CS3cG decay. The same values are adopted in Adopted Gammas.
138CS cL E$From a least-squares fit to |g-ray energies.
138CS cL J$From Adopted Levels
138XE P 0.0 0+ 14.14 M 7 2915 10
138XE cP T$From Adopted Levels of {+138}Xe
138XE cP QP$From 2017Wa10
138CS N 0.0341 11 0.0341 11 1.0 1.0
138CS cN NR$0.0349 {I11} deduced from measured absolute |g-ray emission
138CS2cN probabilities in 2013Xi08: I(258.4|g)=34.9 {I10}, I(434.6|g)=22.2 {I6}
138CS3cN and I(1768.3|g)=18.8 {I5}, versus corresponding relative intensities in
138CS4cN this dataset; 0.0325 {I16} from absolute I|g(258.4|g)=32.5 {I15} in
138CS5cN 1972Mo33. The adopted value 0.0341 {I11} is the weighted average of
138CS6cN these two values. The absolute I|g(258.4|g) in 1972Mo33 was deduced
138CS7cN based on I(258.4|g)/I(1436|g in {+138}Cs decay) in equilibrium, with
138CS8cN absolute I|g(1436|g) obtained using data of {+138}Cs decay in 1971Ca21.
138CS PN 3
138CS G 329.4 5 0.49 24
138CS G 579.68 14 2.4 4
138CS G 733.9 4 1.0 3
138CS G 1218.7 5 1.2 5
138CS G 2266.8 5 1.2 4
138CS L 0.0 3- 32.5 M 2
138CS cL T$from Adopted Levels
138CS L 10.86 3 2-
138CS B 8 LT 8.7 GT 1U
138CSS B EAV=1178.1 46
138CS G 10.85 5 20.2 9 M1 89.7 18 1836 74
138CSS G L/T=0.788 10$M/T=0.162 5
138CSS G N/T=0.0341 10$O/T=0.00472 13$P/T=0.000229 7
138CSS G LC=71.5 14$MC=14.7 3
138CSS G NC=3.10 7$OC=0.428 9$PC=0.0207 4
138CS cG E$from 1972Mo33
138CS cG TI$from |g+ce intensity imbalance at ground state assuming no g.s.
138CS2cG |b feeding. The total |g+ce feeding to g.s. from levels above 10.86 keV
138CS3cG is 37.4% {I15} with total relative I(|g+ce)=1096 {I22}, leaving the
138CS4cG rest 62.6% {I15} feeding to be accounted for by |g+ce intensity of this
138CS5cG transition.
138CS cG RI$deduced from I(|g+ce) and |a(total).
138CS cG M$from L1:L2:L3=100:7 {I2}:1.5 {I10} (1972Mo33) and
138CS2cG |a(L)=150 {I70} (1973Ac01) based on X(L)/|g. (authors' value in
138CS3cG 1973Ac01 is obtained using |w(L)=0.143 from 1970Ma01 (Appendix III).
138CS dG M$In previous evaluation (2003So13,1976Pa04), it states that the
138CS2dG recommended |w(L)=0.11, which is indicated from 1972Bb16. But 1972Bb16
138CS3dG give no recommended |w(L) and only list measured |w(L)=0.089(13) for
138CS4dG Cs element. It is seen in the same table that a value of |w(L)=0.11 is
138CS5dG for Xe element.
138CS L 15.750 21(1)-
138CS B 11 LT 7.2 GT
138CSS B EAV=1187.9 47
138CS G 4.85 5 5.9 8 M1 202 7 1.20E3 15
138CSS G M/T=0.802 18
138CSS G N/T=0.169 8$O/T=0.0234 12$P/T=0.00113 6
138CSS G MC=163 6
138CSS G NC=34.3 12$OC=4.74 17$PC=0.229 8
138CS cG E$from 1972Mo33
138CS cG TI$from intensity balance at 10.9 and 15.8 levels. The combined
138CS2cG |b feeding to 10.9 and 15.8 level is 7.1% {I26} from intensity
138CS3cG balances.
138CS cG RI$deduced from I(|g+ce) and |a(total)
138CS cG M$from ce(M1)/ce(M2)>11 (1972Mo33).
138CS L 258.405 19 1-,2-
138CS B 5.6 11 7.4 1
138CSS B EAV=1075.9 46
138CS G 242.56 5 111 2M1,E2 0.082 5
138CSS G KC=0.0684 18$LC=0.0112 25$MC=0.0023 6
138CSS G NC=0.00048 11$OC=6.4E-5 12$PC=2.46E-6 17
138CS cG M$|a(K)exp=0.062 {I14} (1973Ac01)
138CS G 258.411 20 1000 20E2 0.0706
138CSS G KC=0.0570 8$LC=0.01077 15$MC=0.00226 4
138CSS G NC=0.000467 7$OC=5.99E-5 9$PC=1.89E-6 3
138CS cG E$from 1979Bo26
138CS cG RI$2013Xi08 measured absolute emission probability=34.9 {I10}, 1972Mo33
138CS2cG report 32.5 {I15}.
138CS cG M$|a(K)exp=0.056 {I5} (1973Ac01), 0.058 {I20} (1972Mo33)
138CS L 335.37 8
138CS B 0.04 LT 9.5 GT
138CSS B EAV=1040.5 46
138CS G 325.3 3 0.74 25
138CS G 335.28 9 3.4 3
138CS L 403.7215
138CS G 68.3 2 1.5 5
138CS cG E$from 1972Mo33
138CS G 403
138CS L 412.263 19 1-
138CS B 15.0 8 6.85 3
138CSS B EAV=1005.2 46
138CS G 153.858 3 189 4M1,E2 0.34 8
138CSF G FL=258.405
138CSS G KC=0.27 4$LC=0.06 3$MC=0.012 6
138CSS G NC=0.0025 12$OC=0.00031 13$PC=9.16E-6 18
138CS cG E$from 1979Bo26
138CS cG M$|a(K)exp=0.29 {I3} (1973Ac01), 0.31 {I10} (1972Mo33)
138CS G 396.513 10 200 4M1,E2 0.0200 17
138CSS G KC=0.0170 17$LC=0.00241 4$MC=0.000496 10
138CSS G NC=0.0001042 16$OC=1.42E-5 4$PC=6.3E-7 10
138CS cG E$from 1979Bo26
138CS cG M$|a(K)exp=0.016 {I3} (1973Ac01)
138CS G 401.36 5 69 3M1 0.0210
138CSS G KC=0.0181 3$LC=0.00232 4$MC=0.000474 7
138CSS G NC=0.0001004 14$OC=1.403E-5 20$PC=7.02E-7 10
138CS cG M$|a(K)exp=0.037 {I8} (1973Ac01)
138CS G 412.8 7 2 1
138CS cG E$observed by 1973Ac01, difficult to detect due to {+138}Cs
138CS2cG contaminant, this g.s. feeding |g-ray helps to define J|p(412)=1- and
138CSxcG M(401)=M1
138CS L 450.33 5 0-,1-
138CS B 21.7 9 6.66 2
138CSS B EAV=987.8 46
138CS G 434.562 41 645 13M1,E2 0.0156 16
138CSS G KC=0.0133 16$LC=0.00185 6$MC=0.000381 9
138CSS G NC=8.00E-5 23$OC=1.09E-5 6$PC=5.0E-7 8
138CS cG E$from 1979Bo26
138CS cG RI$2013Xi08 measured absolute emission probability=22.2 {I6}
138CS cG M$|a(K)exp=0.015 {I2} (1973Ac01)
138CS L 540.99 4
138CS G 137.20 20 2.2 11
138CS G 282.51 6 13.6 4
138CS G 530.07 7 8.0 4
138CS G 540.8 6 0.7 4
138CS L 555.98 9 1-,2- ?
138CS B 0.05 2 9.2 2
138CSS B EAV=939.5 46
138CS G 555.95 9 3.7 4
138CS L 691.16 11 1-,2-
138CS B 0.06 3 9.0 2
138CSS B EAV=878.0 46
138CS G 675.37 15 2.3 4
138CS G 680.24 19 1.7 4
138CS G 691.5 4 1.0 4
138CS L 912.48 4 (1-,2)
138CS G 371.44 5 15.9 8
138CS G 500.22 6 11.5 4
138CS G 654.08 8 4.6 4
138CS G 896.87 12 4.2 4
138CS G 912.51 7 10.4 6
138CS L 952.09 6(0-,1)
138CS B 0.30 4 8.12 6
138CSS B EAV=760.2 45
138CS G 693.53 16 2.8 4
138CS G 936.36 11 4.3 4
138CS G 941.25 8 7.3 5
138CS L 1109.59 5(0-,1)
138CS B 0.08 7 8.6 4
138CSS B EAV=689.8 45
138CS G 197
138CS G 568.53 6 9.7 5
138CS G 697.6 4 0.7 3
138CS G 774.21 15 2.1 3
138CS G 851.30 17 2.2 4
138CS G 1093.87 9 13.0 8
138CS G 1098.77 11 6.8 5
138CS L 1157.39 6
138CS G 746
138CS G 1141.64 9 16.3 9
138CS L 1160.93 7 (1-,2)
138CS G 619.7 5 0.7 4
138CS G 902.3 3 1.4 4
138CS G 1145.44 18 4.2 6
138CS G 1160.96 18 3.1 4
138CS L 1205.2510 (1-,2-)
138CS B 0.21 4 8.0 1
138CSS B EAV=647.4 45
138CS G 755.0 6 0.8 4
138CS G 792.9 4 0.7 3
138CS G 869
138CS G 946.63 20 2.0 4
138CS G 1189.54 21 2.6 4
138CS G 1194.94 20 2.8 4
138CS G 1204.5 4 1.1 4
138CS L 1372.1418 ?
138CS B 0.17 3 8.0 1
138CSS B EAV=574.1 44
138CS G 816.06 18 2.3 4
138CS G 1356.6 4 1.6 5
138CS G 1361.9 6 1.1 5
138CS L 1488.8811
138CS G 1076.38 22 2.8 5
138CS G 1473.2 3 2.2 4
138CS L 1537.9221
138CS B 0.04 3 8.4 4
138CSS B EAV=502.4 43
138CS G 586.0 4 0.60 22
138CS G 996.8 3 2.0 5
138CS L 1559.5713
138CS G 647.2 5 0.5 3
138CS G 1548.9 4 2.4 6
138CS L 1794.07 12 (0-,1)
138CS B 0.25 3 7.26 6
138CSS B EAV=394.2 42
138CS G 588.84 8 3.9 3
138CS G 1381.4 3 2.2 5
138CS G 1783.4 6 1.2 5
138CS L 2022.2216 (0-,1)
138CS B 0.30 3 6.82 5
138CSS B EAV=301.3 40
138CS G 534.0 6 0.47 19
138CS G 1571.84 16 8.4 8
138CS L 2026.73 5 1+
138CS B 35.3 13 4.74 3
138CSS B EAV=299.5 40
138CS G 537.76 13 3.7 5
138CS G 865.82 7 9.4 6
138CS G 869.35 6 19.7 11
138CS G 917.13 6 29.2 12
138CS G 1114.29 10 46.8 22
138CS G 1614.57 18 7.5 8
138CS G 1768.26 13 531 11
138CS cG RI$2013Xi08 measured absolute emission probability=18.8 {I5}
138CS G 2015.82 14 389 8
138CS L 2263.13 7 1+
138CS B 10.3 4 4.80 3
138CSS B EAV=208.2 38
138CS G 703.58 17 1.8 3
138CS G 1102.24 17 3.4 4
138CS G 1153.6 5 1.0 5
138CS G 1311.07 24 2.7 5
138CS G 1812.54 18 5.7 6
138CS G 1850.86 13 45.2 15
138CS G 2004.75 14 170 4
138CS G 2252.26 14 72.6 21
138CS L 2337.65 7 1+
138CS B 3.31 14 5.11 4
138CSS B EAV=180.7 37
138CS G 778.10 19 1.4 3
138CS G 799.6 6 0.5 3
138CS G 848.7 3 1.4 4
138CS G 1228.3 4 2.0 7
138CS G 1385.5 3 2.4 5
138CS G 1646.5 3 2.1 4
138CS G 1887.3 3 2.2 4
138CS G 1925.36 14 17.9 10
138CS G 2079.17 14 45.8 14
138CS G 2321.90 16 19.7 9
138CS G 2326.9 3 1.8 3
138CS L 2491.0114 1+
138CS B 0.49 4 5.48 5
138CSS B EAV=126.6 35
138CS G 953.1 5 0.9 4
138CS G 1578.1 5 1.6 6
138CS G 1799.4 6 1.1 4
138CS G 2041.2 5 1.0 3
138CS G 2475.26 16 9.9 5
138CS L 2508.43 14 1+ ?
138CS B 0.25 2 5.72 5
138CSS B EAV=120.7 34
138CS G 2492.61 24 1.7 2
138CS G 2497.56 17 5.5 4