ADOPTED LEVELS, GAMMAS for 138Cs
Author: Jun Chen | Citation: Nucl. Data Sheets 146, 1 (2017) | Cutoff date: 30-Sep-2017
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=5375 keV 9 | S(n)= 4413 keV 9 | S(p)= 7793 keV 9 | Q(α)= -1268 keV 10 | ||
| Reference: 2017WA10 |
| References: | |||
| A | 138Xe β- decay (14.14 M) | B | 138Cs IT decay (2.91 M) |
| C | 248Cm SF decay | D | 252Cf SF decay |
| E | 138Ba(μ-,γ) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | ABCDE | 3- | 32.5 m 2 % β- = 100 | |||||
| 10.86 3 | A | 2- | 10.85 5 | 100 | M1 | 0.0 | 3- | |
| 15.749 21 | A | (1)- | 4.85 5 | 100 | M1 | 10.86 | 2- | |
| 79.9 3 | BCD | 6- | 2.91 m 10 % β- = 19 3 % IT = 81 3 | 79.9 3 | 100 | M3 | 0.0 | 3- |
| 254.4 5 | CD | (7-) | 174.5 | 100 | (M1) | 79.9 | 6- | |
| 258.405 19 | A E | 1-,2- | 242.56 5 258.411 20 | 11.1 2 100 2 | M1,E2 E2 | 15.749 0.0 | (1)- 3- | |
| 335.38 8 | A | 325.3 3 335.28 9 | 22 8 100 9 | 10.86 0.0 | 2- 3- | |||
| 403.68 15 | A | 68.3 2 403 | | 335.38 0.0 | 3- | |||
| 412.262 19 | A | 1- | 153.858 3 396.513 10 401.36 5 412.8 7 | 94.5 20 100.0 20 34.5 15 1.0 5 | M1,E2 M1,E2 M1 | 258.405 15.749 10.86 0.0 | 1-,2- (1)- 2- 3- | |
| 450.32 5 | A | 0-,1- | 434.56 4 | 100 | M1,E2 | 15.749 | (1)- | |
| 540.99 4 | A | 137.20 20 282.51 6 530.07 7 540.8 6 | 16 8 100 3 59 3 5 3 | 403.68 258.405 10.86 0.0 | 1-,2- 2- 3- | |||
| 555.98 9 ? | A | 1-,2- | 555.95 9 | 100 | 0.0 | 3- | ||
| 691.16 11 | A | 1-,2- | 675.37 15 680.24 19 691.5 4 | 100 18 74 18 43 18 | 15.749 10.86 0.0 | (1)- 2- 3- | ||
| 912.48 4 | A | (1-,2) | 371.44 5 500.22 6 654.08 8 896.87 12 912.51 7 | 100 5 72.3 25 28.9 25 26.4 25 65 4 | 540.99 412.262 258.405 15.749 0.0 | 1- 1-,2- (1)- 3- | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 952.09 6 | A | (0-,1) | 693.53 16 936.36 11 941.25 8 | 38 6 59 6 100 7 | 258.405 15.749 10.86 | 1-,2- (1)- 2- | ||
| 1109.59 5 | A | (0-,1) | 197 568.53 6 697.6 4 774.21 15 851.30 17 1093.87 9 1098.77 11 | 75 4 5.4 23 16.2 23 17 3 100 6 52 4 | 912.48 540.99 412.262 335.38 258.405 15.749 10.86 | (1-,2) 1- 1-,2- (1)- 2- | ||
| 1121.8 5 | C | (8-) | 1041.9 | 100 | 79.9 | 6- | ||
| 1157.39 6 | A | 746 1141.64 9 | 100 | 412.262 15.749 | 1- (1)- | |||
| 1160.93 7 | A | (1-,2) | 619.7 5 902.3 3 1145.44 18 1160.96 18 | 17 10 33 10 100 14 74 10 | 540.99 258.405 15.749 0.0 | 1-,2- (1)- 3- | ||
| 1205.23 10 | A | (1-,2-) | 755.0 6 792.9 5 869 946.63 20 1189.54 21 1194.94 20 1204.5 4 | 29 14 25 11 71 4 93 14 100 14 39 14 | 450.32 412.262 335.38 258.405 15.749 10.86 0.0 | 0-,1- 1- 1-,2- (1)- 2- 3- | ||
| 1206.2 5 | C | (8-) | 1126.3 | 100 | 79.9 | 6- | ||
| 1312.4 5 | C | (8-) | 190.5 1058.1 1232.5 | 100 20 27 7 33 7 | 1121.8 254.4 79.9 | (8-) (7-) 6- | ||
| 1372.14 18 ? | A | 816.06 18 1356.6 4 1361.9 6 | 100 18 70 22 48 22 | 555.98 15.749 10.86 | 1-,2- (1)- 2- | |||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 1411.3 6 | CD | (9-) | 1156.9 | 100 | (E2) | 254.4 | (7-) | |
| 1488.88 11 | A | 1076.38 22 1473.2 3 | 100 18 79 14 | 412.262 15.749 | 1- (1)- | |||
| 1537.92 21 | A | 586.0 4 996.8 3 | 30 11 100 25 | 952.09 540.99 | (0-,1) | |||
| 1559.57 13 | A | 647.2 5 1548.9 4 | 21 13 100 25 | 912.48 10.86 | (1-,2) 2- | |||
| 1596.8 5 | CD | (10-) | 185.6 284.5 390.6 | 100 10 19 4 21 4 | M1+E2 | 1411.3 1312.4 1206.2 | (9-) (8-) (8-) | |
| 1794.05 12 | A | (0-,1) | 588.84 8 1381.4 3 1783.4 6 | 100 8 56 13 31 13 | 1205.23 412.262 10.86 | (1-,2-) 1- 2- | ||
| 1832.8 6 | CD | (11-) | 236.0 421.5 | 100 11 13 4 | 1596.8 1411.3 | (10-) (9-) | ||
| 1917.5 7 | CD | (12-) | 84.7 320.7 | 100 12 4.8 24 | M1 | 1832.8 1596.8 | (11-) (10-) | |
| 2022.22 16 | A | (0-,1) | 534.0 6 1571.84 16 | 5.6 23 100 10 | 1488.88 450.32 | 0-,1- | ||
| 2026.73 5 | A | 1+ | 537.76 13 865.82 7 869.35 6 917.13 6 1114.29 10 1614.57 18 1768.26 13 2015.82 14 | 0.70 10 1.77 11 3.71 21 5.50 23 8.8 4 1.41 15 100.0 21 73.3 15 | 1488.88 1160.93 1157.39 1109.59 912.48 412.262 258.405 10.86 | (1-,2) (0-,1) (1-,2) 1- 1-,2- 2- | ||
| 2263.12 7 | A | 1+ | 703.58 17 1102.24 17 1153.6 5 1311.07 24 1812.54 18 1850.86 13 2004.75 14 2252.26 14 | 1.06 18 2.00 24 0.6 3 1.6 3 3.4 4 26.6 9 100.0 24 42.7 13 | 1559.57 1160.93 1109.59 952.09 450.32 412.262 258.405 10.86 | (1-,2) (0-,1) (0-,1) 0-,1- 1- 1-,2- 2- | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 2337.65 7 | A | 1+ | 778.10 19 799.6 6 848.7 3 1228.3 4 1385.5 3 1646.5 3 1887.3 3 1925.36 14 2079.17 14 2321.90 16 2326.9 3 | 3.1 7 1.1 7 3.1 9 4.4 15 5.2 11 4.6 9 4.8 9 39 2 100 3 43 2 3.9 7 | 1559.57 1537.92 1488.88 1109.59 952.09 691.16 450.32 412.262 258.405 15.749 10.86 | (0-,1) (0-,1) 1-,2- 0-,1- 1- 1-,2- (1)- 2- | ||
| 2491.01 14 | A | 1+ | 953.1 5 1578.1 5 1799.4 6 2041.2 5 2475.26 16 | 9 4 16 6 11 4 10 3 100 5 | 1537.92 912.48 691.16 450.32 15.749 | (1-,2) 1-,2- 0-,1- (1)- | ||
| 2508.43 14 ? | A | 1+ | 2492.61 24 2497.56 17 | 31 4 100 7 | 15.749 10.86 | (1)- 2- | ||
| 2731.9 8 | CD | 814.4 | 100 | 1917.5 | (12-) | |||
| 2813.0 8 | CD | (11+) | 895.5 | 100 | 1917.5 | (12-) | ||
| 3158.3 10 | C | 426.4 | 100 | 2731.9 | ||||
| 3260.5 10 | CD | (12+) | 447.5 | 100 | 2813.0 | (11+) | ||
| 3348.8 10 | C | (13+) | 535.8 | 100 | 2813.0 | (11+) | ||
| 4164.5 11 | CD | (14+) | 904.0 | 100 | 3260.5 | (12+) | ||
| 4258.6 11 | C | 909.8 | 100 | 3348.8 | (13+) | |||
| 4626.1 12 | C | (16+) | 461.6 | 100 | 4164.5 | (14+) | ||
E(level): From a least-squares fit to γ-ray energies, assuming ΔEγ=0.5 keV if not given.
M(γ): From ce data in 138Xe β- decay, unless otherwise noted.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - γ sequence based on 6- | |||||||
| 254.4 5 | (7-) | ||||||
| 1411.3 6 | (9-) | 1156.9 | 100 | (E2) | 254.4 | (7-) | |
| 1596.8 5 | (10-) | 185.6 284.5 390.6 | 100 10 19 4 21 4 | M1+E2 | 1411.3 1312.4 1206.2 | (9-) (8-) (8-) | |
| 1832.8 6 | (11-) | 236.0 421.5 | 100 11 13 4 | 1596.8 1411.3 | (10-) (9-) | ||
| 1917.5 7 | (12-) | 84.7 320.7 | 100 12 4.8 24 | M1 | 1832.8 1596.8 | (11-) (10-) | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - γ sequence based on (11+) | |||||||
| 2813.0 8 | (11+) | ||||||
| 3260.5 10 | (12+) | 447.5 | 100 | 2813.0 | (11+) | ||
| 3348.8 10 | (13+) | 535.8 | 100 | 2813.0 | (11+) | ||
| 4164.5 11 | (14+) | 904.0 | 100 | 3260.5 | (12+) | ||
| 4626.1 12 | (16+) | 461.6 | 100 | 4164.5 | (14+) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 10.86 | 2- | 10.85 5 | M1 | 89.7 | α=89.7 18, α(L)=71.5 14, α(M)=14.7 3, α(N)=3.10 7, α(O)=0.428 9, α(P)=0.0207 4 | |
| 15.749 | (1)- | 4.85 5 | M1 | 202 | α=202 7, α(M)=163 6, α(N)=34.3 12, α(O)=4.74 17, α(P)=0.229 8 | |
| 79.9 | 6- | 2.91 m 10 % β- = 19 3 % IT = 81 3 | 79.9 3 | M3 | 213 | B(M3)(W.u.)=0.097 +9-8, α=213 5, α(K)=119.4 25, α(L)=72.7 18, α(M)=16.9 5, α(N)=3.55 9, α(O)=0.444 11, α(P)=0.0127 3 |
| 254.4 | (7-) | 174.5 | (M1) | 0.190 | α=0.190, α(K)=0.1628 23, α(L)=0.0214 3, α(M)=0.00439 7, α(N)=0.000928 13, α(O)=0.0001292 18, α(P)=6.38×10-6 9 | |
| 258.405 | 1-,2- | 242.56 5 | M1,E2 | 0.082 | α=0.082 5, α(K)=0.0684 18, α(L)=0.0112 25, α(M)=0.0023 6, α(N)=0.00048 11, α(O)=6.4×10-5 12, α(P)=2.46E-6 17 | |
| 1-,2- | 258.411 20 | E2 | 0.0706 | α=0.0706, α(K)=0.0570 8, α(L)=0.01077 15, α(M)=0.00226 4, α(N)=0.000467 7, α(O)=5.99×10-5 9, α(P)=1.89E-6 3 | ||
| 412.262 | 1- | 153.858 3 | M1,E2 | 0.34 | α=0.34 8, α(K)=0.27 4, α(L)=0.06 3, α(M)=0.012 6, α(N)=0.0025 12, α(O)=0.00031 13, α(P)=9.16×10-6 18 | |
| 1- | 396.513 10 | M1,E2 | 0.0200 | α=0.0200 17, α(K)=0.0170 17, α(L)=0.00241 4, α(M)=0.000496 10, α(N)=0.0001042 16, α(O)=1.42×10-5 4, α(P)=6.3E-7 10 | ||
| 1- | 401.36 5 | M1 | 0.0210 | α=0.0210, α(K)=0.0181 3, α(L)=0.00232 4, α(M)=0.000474 7, α(N)=0.0001004 14, α(O)=1.403×10-5 20, α(P)=7.02E-7 10 | ||
| 450.32 | 0-,1- | 434.56 4 | M1,E2 | 0.0156 | α=0.0156 16, α(K)=0.0133 16, α(L)=0.00185 6, α(M)=0.000381 9, α(N)=8.00×10-5 23, α(O)=1.09E-5 6, α(P)=5.0E-7 8 | |
| 1411.3 | (9-) | 1156.9 | (E2) | 1.26×10-3 | α=1.26×10-3, α(K)=0.001084 16, α(L)=0.0001382 20, α(M)=2.82E-5 4, α(N)=5.94E-6 9, α(O)=8.25E-7 12, α(P)=4.02E-8 6 | |
| 1596.8 | (10-) | 185.6 | M1+E2 | 0.19 | α=0.19 3, α(K)=0.152 15, α(L)=0.028 11, α(M)=0.0059 23, α(N)=0.0012 5, α(O)=0.00016 5, α(P)=5.30×10-6 12 | |
| 1917.5 | (12-) | 84.7 | M1 | 1.448 | α=1.448, α(K)=1.240 18, α(L)=0.1656 24, α(M)=0.0339 5, α(N)=0.00717 10, α(O)=0.000996 14, α(P)=4.88×10-5 7 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 3- | 32.5 m 2 % β- = 100 | μ=+0.700 4 (1981Th06,2014StZZ), Q=+0.112 17 (1981Th06,2016St14) Configuration=πg7/2-3~#νf7/2 (1979Ek02). |
| 79.9 | 6- | 2.91 m 10 % β- = 19 3 % IT = 81 3 | μ=+1.713 9 (1981Th06,2014StZZ), Q=-0.37 5 (1981Th06,2016St14) %IT is the weighted average of 81.5 +25-30 (at 68.3% confidence level) from 1978Au08 and 75 8 from 1971Ca21, deduced from growth curves of 463γ, 1436γ, and 1010γ. Other: %IT=81.5 +50-140 from 1978Au08 at 99.7% confidence level. The 1010γ is not fed in β- decay of 2.9-min 138Cs, but follows the β- decay of the 138Cs ground state (1978Au08,1971Ca21). E(level): %IT is the weighted average of 81.5 +25-30 (at 68.3% confidence level) from 1978Au08 and 75 8 from 1971Ca21, deduced from growth curves of 463γ, 1436γ, and 1010γ. Other: %IT=81.5 +50-140 from 1978Au08 at 99.7% confidence level. The 1010γ is not fed in β- decay of 2.9-min 138Cs, but follows the β- decay of the 138Cs ground state (1978Au08,1971Ca21). |
| E(level) | E(gamma) | Comments |
| 79.9 | 79.9 | E(γ): from 138Cs IT decay M(γ): T1/2=2.91 min requires Mult=M3 or E3; M3 (α(K)=119, calculated using the BrIcc program) would account for observed K x-ray intensity in 138Cs IT decay (1971Ca21) whereas E3 (α(K)=12.5) would not |
| 254.4 | 174.5 | E(γ): from 252Cf SF decay. Other: 175.5 from 242Cm SF decay M(γ): From γγ(θ) and ce data in 252Cf SF decay |
| 1121.8 | 1041.9 | E(γ): from 248Cm SF decay |
| 1206.2 | 1126.3 | E(γ): from 248Cm SF decay |
| 1411.3 | 1156.9 | E(γ): from 252Cf SF decay. Other: 1157.0 from 248Cm SF decay M(γ): From γγ(θ) and ce data in 252Cf SF decay |
| 1596.8 | 185.6 | M(γ): From γγ(θ) and ce data in 252Cf SF decay |
| 1917.5 | 84.7 | M(γ): From γγ(θ) and ce data in 252Cf SF decay | 320.7 | E(γ): from 252Cf SF decay. Other: 321 from 248Cm SF decay I(γ): from 248Cm SF decay |
| 2731.9 | 814.4 | E(γ): from 248Cm SF decay and 252Cf SF decay |
| 2813.0 | 895.5 | E(γ): from 252Cf SF decay. Other: 895.4 from 248Cm SF decay |
| 3158.3 | 426.4 | E(γ): from 252Cf SF decay. |
| 3260.5 | 447.5 | E(γ): from 252Cf SF decay. Other: 447.2 from 248Cm SF decay |
| 3348.8 | 535.8 | E(γ): from 252Cf SF decay. |
| 4164.5 | 904.0 | E(γ): from 252Cf SF decay. Other: 903.8 from 248Cm SF decay |
| 4258.6 | 909.8 | E(γ): from 252Cf SF decay. |
| 4626.1 | 461.6 | E(γ): from 252Cf SF decay. |
First identification of 138Xe nuclide by 1943Se02 (see 2012Ma48)
Other reactions:
137Cs(n,γ): 2000NaZY, 2000Wa38, 1998Ma97, 1993Se11, 1990Ha24
138Ba(n,p): 2012La07, 2000ZhZV, 1997FiZZ, 1989Fa13
Q-value: S(2n)=12691 9, S(2p)=17920 17, Q(2β+)=3632 10 (2017Wa10)