ADOPTED LEVELS, GAMMAS for 142Ba
Authors: T.D. Johnson, D. Symochko, M. Fadil, and J.K. Tuli | Citation: Nucl. Data Sheets 112, 1949 (2011) | Cutoff date: 1-Jun-2010
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=2181 keV 9 | S(n)= 6181 keV 8 | S(p)= 10655 keV 11 | Q(α)= -295 keV 7 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 142Cs β- decay | B | 248Cm SF decay |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | AB | 0+ | 10.6 m 2 % β- = 100 | |||||
| 359.596 14 | AB | 2+ | 65 ps 2 | 359.598 14 | 100 | E2 | 0.0 | 0+ |
| 834.81 9 | AB | 4+ | 12.5 ps 8 | 475.17 9 | 100 | E2 | 359.596 | 2+ |
| 1292.20 14 | AB | (3-) | 457.26 15 932.82 20 | 20 2 100 15 | D+Q | 834.81 359.596 | 4+ 2+ | |
| 1326.48 5 | A | 1- | 10 ps 5 | 966.89 7 1326.46 7 | 69 6 100.0 15 | D+(Q) | 359.596 0.0 | 2+ 0+ |
| 1424.06 6 | A | 2+ | < 9 ps | 1064.54 7 1423.9 1 | 87 18 100 5 | E2+(M1) Q | 359.596 0.0 | 2+ 0+ |
| 1465.98 24 | B | 6+ | 7.2 ps 13 | 631.1 3 | 100 | E2 | 834.81 | 4+ |
| 1535.53 7 | A | 0+ | 9 ps 7 | 209.1 5 1175.93 6 | 3.3 3 100 2 | Q | 1326.48 359.596 | 1- 2+ |
| 1541.57 23 | B | 5- | 249.2 706.8 3 | 100 | E1 | 1292.20 834.81 | (3-) 4+ | |
| 1639.60 10 | A | 0+ | < 16 ps | 1280.0 1 | 100 | Q | 359.596 | 2+ |
| 1693.0 3 ? | A | 2+ | 1333.4 3 | 100 | D+Q | 359.596 | 2+ | |
| 1747.40 23 | B | 5(+) | 205.8 3 912.6 3 | 37 9 100 14 | (M1) | 1541.57 834.81 | 5- 4+ | |
| 1781.50 10 | A | 1421.9 1 | 100 | D+(Q) | 359.596 | 2+ | ||
| 1848.41 21 | B | 6+ | 101.0 3 306.9 3 382.4 3 1013.6 3 | 38 13 100 10 25 13 73 10 | [D+Q] [E1] E2 | 1747.40 1541.57 1465.98 834.81 | 5(+) 5- 6+ 4+ | |
| 1952.7 4 | B | 7- | 411.8 2 487.0 3 | 13 2 100 11 | [E2] E1 | 1541.57 1465.98 | 5- 6+ | |
| 2070.1 3 | B | 7(+) | 222.0 2 323.2 2 603.8 3 | 37 8 25 5 100 17 | [D+Q] [E2] (M1) | 1848.41 1747.40 1465.98 | 6+ 5(+) 6+ | |
| 2127.9 3 | A | 0+ | 1768.3 3 | 100 | Q | 359.596 | 2+ | |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 2159.4 4 | B | 8+ | 206.6 2 693.4 3 | 2.3 8 100 | [E1] E2 | 1952.7 1465.98 | 7- 6+ | |
| 2229.3 3 | B | 8(+) | 159.0 3 276.8 3 380.9 3 763.4 3 | 46 9 35 5 100 12 69 8 | [D+Q] [E1] (E2) (E2) | 2070.1 1952.7 1848.41 1465.98 | 7(+) 7- 6+ 6+ | |
| 2341.77 10 | A | 1 | 1015.3 1 1982.1 2 2341.7 5 | 15.9 11 100 7 15.9 25 | D+(Q) | 1326.48 359.596 0.0 | 1- 2+ 0+ | |
| 2513.8 4 | B | 9- | 284 1 354.3 3 560.9 2 | 14 6 100 8 88 8 | [D+Q] E1 (E2) | 2229.3 2159.4 1952.7 | 8(+) 8+ 7- | |
| 2569.78 11 | A | 1243.3 1 | 100 | 1326.48 | 1- | |||
| 2680.1 4 | B | (9+) | 451.0 3 609.8 3 | 100 11 84 18 | [D+Q] [E2] | 2229.3 2070.1 | 8(+) 7(+) | |
| 2814.9 4 | B | (10+) | 301.1 3 585.7 3 655.4 3 | 22 6 100 9 24 6 | [D] [E2] [Q] | 2513.8 2229.3 2159.4 | 9- 8(+) 8+ | |
| 2882.57 16 | A | (1,2+) | 1101.1 2 2522.9 4 2882.5 3 | 74 22 66 10 100 9 | 1781.50 359.596 0.0 | 2+ 0+ | ||
| 2925.9 4 | B | (10+) | 412.1 3 766.5 3 | 43 9 100 13 | [D] [E2] | 2513.8 2159.4 | 9- 8+ | |
| 3144.38 23 | A | (1) | 1818.0 3 2784.6 5 3144.2 5 | 100 11 39 9 46 10 | 1326.48 359.596 0.0 | 1- 2+ 0+ | ||
| 3153.9 5 | B | (11-) | 228.0 3 640.1 3 | 42 8 100 20 | [D] [E2] | 2925.9 2513.8 | (10+) 9- | |
| 3261.7 4 | A | (1) | 1935.2 4 3261.6 5 | 100 11 49 8 | 1326.48 0.0 | 1- 0+ | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 3283.29 19 | A | (1) | 1956.8 4 2923.5 3 3283.4 3 | 45 8 83 8 100 10 | 1326.48 359.596 0.0 | 1- 2+ 0+ | ||
| 3343.0 5 | B | 662.9 3 | 100 | 2680.1 | (9+) | |||
| 3507.3 5 | B | 692.4 3 | 100 | 2814.9 | (10+) | |||
| 3573.08 24 | A | (1) | 2246.1 4 3573.3 3 | 60 7 100 7 | 1326.48 0.0 | 1- 0+ | ||
| 3794.9 5 | B | 641.0 3 869 1 | 100 50 25 15 | 3153.9 2925.9 | (11-) (10+) | |||
| 3932.9 6 | B | 779.0 3 | 100 | 3153.9 | (11-) | |||
| 4369.3 4 | A | (1) | 4009.3 7 4369.3 4 | 25 7 100 9 | 359.596 0.0 | 2+ 0+ | ||
| 4517.4 6 ? | B | 722.5 3 | 100 | 3794.9 | ||||
| 5280.4 4 | A | 2397.8 4 2938.6 5 | 100 9 17 4 | 2882.57 2341.77 | (1,2+) 1 | |||
E(level): Least-squares fit to data from 142Ce β- decay and 248Cm SF decay. Some levels from 252Cf resulting in γ placement not consistent with 248Cm SF decay were not adopted.
Jπ(level): From angular correlation and polarization measurements in 248Cm SF decay, except where noted.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - GS band. | |||||||
| 0.0 | 0+ | 10.6 m 2 % β- = 100 | |||||
| 359.596 14 | 2+ | 65 ps 2 | 359.598 14 | 100 | E2 | 0.0 | 0+ |
| 834.81 9 | 4+ | 12.5 ps 8 | 475.17 9 | 100 | E2 | 359.596 | 2+ |
| 1465.98 24 | 6+ | 7.2 ps 13 | 631.1 3 | 100 | E2 | 834.81 | 4+ |
| 2159.4 4 | 8+ | 206.6 2 693.4 3 | 2.3 8 100 | [E1] E2 | 1952.7 1465.98 | 7- 6+ | |
| 2925.9 4 | (10+) | 412.1 3 766.5 3 | 43 9 100 13 | [D] [E2] | 2513.8 2159.4 | 9- 8+ | |
| 3794.9 5 | 641.0 3 869 1 | 100 50 25 15 | 3153.9 2925.9 | (11-) (10+) | |||
| 4517.4 6 | 722.5 3 | 100 | 3794.9 | ||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - octupole band | |||||||
| 1292.20 14 | (3-) | ||||||
| 1541.57 23 | 5- | 249.2 706.8 3 | 100 | E1 | 1292.20 834.81 | (3-) 4+ | |
| 1952.7 4 | 7- | 411.8 2 487.0 3 | 13 2 100 11 | [E2] E1 | 1541.57 1465.98 | 5- 6+ | |
| 2513.8 4 | 9- | 284 1 354.3 3 560.9 2 | 14 6 100 8 88 8 | [D+Q] E1 (E2) | 2229.3 2159.4 1952.7 | 8(+) 8+ 7- | |
| 3153.9 5 | (11-) | 228.0 3 640.1 3 | 42 8 100 20 | [D] [E2] | 2925.9 2513.8 | (10+) 9- | |
| 3932.9 6 | 779.0 3 | 100 | 3153.9 | (11-) | |||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 3 - possible ROTATIONAL BAND-1 | |||||||
| 1848.41 21 | 6+ | ||||||
| 2229.3 3 | 8(+) | 159.0 3 276.8 3 380.9 3 763.4 3 | 46 9 35 5 100 12 69 8 | [D+Q] [E1] (E2) (E2) | 2070.1 1952.7 1848.41 1465.98 | 7(+) 7- 6+ 6+ | |
| 2814.9 4 | (10+) | 301.1 3 585.7 3 655.4 3 | 22 6 100 9 24 6 | [D] [E2] [Q] | 2513.8 2229.3 2159.4 | 9- 8(+) 8+ | |
| 3507.3 5 | 692.4 3 | 100 | 2814.9 | (10+) | |||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 4 - possible ROTATIONAL BAND-2 | |||||||
| 1747.40 23 | 5(+) | ||||||
| 2070.1 3 | 7(+) | 222.0 2 323.2 2 603.8 3 | 37 8 25 5 100 17 | [D+Q] [E2] (M1) | 1848.41 1747.40 1465.98 | 6+ 5(+) 6+ | |
| 2680.1 4 | (9+) | 451.0 3 609.8 3 | 100 11 84 18 | [D+Q] [E2] | 2229.3 2070.1 | 8(+) 7(+) | |
| 3343.0 5 | 662.9 3 | 100 | 2680.1 | (9+) | |||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
| 359.596 | 2+ | 65 ps 2 | 359.598 14 | E2 | 0.0257 | B(E2)(W.u.)=32.1 10, α=0.0257, α(K)=0.0212 3, α(L)=0.00356 5, α(M)=0.000748 11, α(N)=0.0001589 23, α(O)=2.31E-5 4, α(P)=1.232E-6 18, α(N+)=0.000183 3 | |
| 834.81 | 4+ | 12.5 ps 8 | 475.17 9 | E2 | 0.01135 | B(E2)(W.u.)=45 4, α=0.01135, α(K)=0.00952 14, α(L)=0.001455 21, α(M)=0.000303 5, α(N)=6.48E-5 9, α(O)=9.57E-6 14, α(P)=5.70E-7 8, α(N+)=7.49E-5 11 | |
| 1326.48 | 1- | 10 ps 5 | 966.89 7 | D+(Q) | -0.013 8 | ||
| 1424.06 | 2+ | < 9 ps | 1064.54 7 | E2+(M1) | 10 GT | 0.001586 | B(E2)(W.u.)>0.48, α=0.001586 23, α(K)=0.001363 20, α(L)=0.0001773 25, α(M)=3.64E-5 6, α(N)=7.84E-6 11, α(O)=1.194E-6 17, α(P)=8.46E-8 12, α(N+)=9.12E-6 |
| 1465.98 | 6+ | 7.2 ps 13 | 631.1 3 | E2 | 0.00532 | B(E2)(W.u.)=18 4, α=0.00532 8, α(K)=0.00451 7, α(L)=0.000641 9, α(M)=0.0001329 19, α(N)=2.85E-5 4, α(O)=4.26E-6 6, α(P)=2.76E-7 4, α(N+)=3.30E-5 5 | |
| 1541.57 | 5- | 706.8 3 | E1 | 0.001519 | α=0.001519 22, α(K)=0.001314 19, α(L)=0.0001632 23, α(M)=3.34×10-5 5, α(N)=7.18E-6 10, α(O)=1.097E-6 16, α(P)=7.96E-8 12, α(N+)=8.36E-6 | ||
| 1693.0 | 2+ | 1333.4 3 | D+Q | -0.94 29 | |||
| 2341.77 | 1 | 1982.1 2 | D+(Q) | +0.09 5 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 0+ | 10.6 m 2 % β- = 100 | HFS, isomer shift (1988We07,1985Ne09,1983Mu12,1981Ne06), mass (1986Au02). E(level): GS band. |
| 359.596 | 2+ | 65 ps 2 | μ=+0.852 10 (2005St24,1988Wo03,1986Gi14) E(level): GS band. T1/2(level): From βγγ(t) (1990Ma25). |
| 834.81 | 4+ | 12.5 ps 8 | E(level): GS band. |
| 1292.20 | (3-) | E(level): octupole band. | |
| 1326.48 | 1- | 10 ps 5 | T1/2(level): From βγγ(t) (1990Ma25). |
| 1424.06 | 2+ | < 9 ps | T1/2(level): From βγγ(t) (1990Ma25). |
| 1465.98 | 6+ | 7.2 ps 13 | E(level): GS band. |
| 1535.53 | 0+ | 9 ps 7 | T1/2(level): From βγγ(t) (1990Ma25). |
| 1541.57 | 5- | E(level): octupole band. | |
| 1639.60 | 0+ | < 16 ps | T1/2(level): From βγγ(t) (1990Ma25). |
| 1747.40 | 5(+) | E(level): possible ROTATIONAL BAND-2. | |
| 1848.41 | 6+ | E(level): possible ROTATIONAL BAND-1. | |
| 1952.7 | 7- | E(level): octupole band. | |
| 2070.1 | 7(+) | E(level): possible ROTATIONAL BAND-2. | |
| 2159.4 | 8+ | E(level): GS band. | |
| 2229.3 | 8(+) | E(level): possible ROTATIONAL BAND-1. | |
| 2513.8 | 9- | E(level): octupole band. | |
| 2680.1 | (9+) | E(level): possible ROTATIONAL BAND-2. | |
| 2814.9 | (10+) | E(level): possible ROTATIONAL BAND-1. | |
| 2925.9 | (10+) | E(level): GS band. | |
| 3153.9 | (11-) | E(level): octupole band. | |
| 3343.0 | E(level): possible ROTATIONAL BAND-2. | ||
| 3507.3 | E(level): possible ROTATIONAL BAND-1. | ||
| 3794.9 | E(level): GS band. | ||
| 3932.9 | E(level): octupole band. | ||
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 4517.4 | E(level): GS band. |
| E(level) | E(gamma) | Comments |
| 834.81 | 475.17 | M(γ): compatible with γγ(θ) |
| 1424.06 | 1064.54 | M(γ): from γγ(θ) |
| 1848.41 | 382.4 | I(γ): 88 in 252Cf SF decay | 1013.6 | I(γ): 48 in 252Cf SF decay |
Optical isotope shift: 1997Co26 (with respect to 140Ba,144Ba)
Nuclear structure, calculations, theory: 2007Ji05, 1997Sa16, 1995Hi10, 1995Ba45 (also 1992Eg01,1991Eg01,1990Eg01), 1992Wo11, 1992Na07.
Q-value: Note: Current evaluation has used the following Q record 2177 96183 810654 12-295 7 2011AuZZ
Q-value: Q(β-n)=-2982 8, Q(εp)=-16937 7 2011AuZZ
Q-value: Values in 2003Au03: Q(β-)=2212 5, S(n)=6169 10, S(p)=10635 12, Q(α)=-100 4, Q(β-n)=-2956 7, Q(εp)=-16790 9