ADOPTED LEVELS, GAMMAS for 148La
Author: N. Nica | Citation: Nucl. Data Sheets 117, 1 (2014) | Cutoff date: 1-Oct-2013
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=7690 keV 22 | S(n)= 4102 keV 22 | S(p)= 9734 keV 28 | Q(α)= -1860 keV 30 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 148Ba β- decay | B | 149Ba β-n decay (0.344 S) |
| C | 252Cf SF decay | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | A C | (2-) | 1.26 s 8 % β- = 100 % β-n = 0.15 3 | |||||
| 47.21 3 | A | (1-,2-) | 47.22 4 | 100 | (M1) | 0.0 | (2-) | |
| 56.034 25 | A C | (1+) | 67 ns 4 | 56.08 4 | 100 | E1 | 0.0 | (2-) |
| 61.44 3 | A | (-) | 61.48 4 | 100 | M1,E2 | 0.0 | (2-) | |
| 109.89 3 | A | (1+) | 48.44 4 53.81 4 109.87 5 | 58 1 100 2 23 2 | E1 M1,E2 | 61.44 56.034 0.0 | (-) (1+) (2-) | |
| 133.668 24 | A | (-) | 72.20 5 86.44 4 133.53 4 | 50 5 52 2 100 2 | M1,E2 E2,M1 | 61.44 47.21 0.0 | (-) (1-,2-) (2-) | |
| 140.92 22 | C | (2+) | 84.7 3 141.1 3 | 100 20.2 | M1 [E1] | 56.034 0.0 | (1+) (2-) | |
| 154.49 4 | A | 44.43 6 98.5 2 107.32 5 | 7 1 100 21 15 2 | 109.89 56.034 47.21 | (1+) (1+) (1-,2-) | |||
| 159.42 6 | A | 49.65 8 98.1 2 | 19 4 100 23 | 109.89 61.44 | (1+) (-) | |||
| 168.71 4 | A | 112.73 5 168.68 5 | 33 2 100 7 | 56.034 0.0 | (1+) (2-) | |||
| 201.26 5 | A | 46.30 6 145.48 5 | 3 2 100 3 | 154.49 56.034 | (1+) | |||
| 217.86 4 | A | 58.52 6 84.02 5 156.42 6 218.30 10 | 18 2 100 8 82 5 20 5 | 159.42 133.668 61.44 0.0 | (-) (-) (2-) | |||
| 230.46 5 | A | 96.58 6 120.95 20 174.55 5 | 66 7 100 20 97 10 | 133.668 109.89 56.034 | (-) (1+) (1+) | |||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 261.08 5 | A | 92.40 5 127.38 6 | 100 4 62 8 | 168.71 133.668 | (-) | |||
| 282.2 4 | C | (3+) | 141.3 3 | 100 | M1(+E2) | 140.92 | (2+) | |
| 287.08 5 | A | 153.39 8 177.06 6 | 50 8 100 8 | 133.668 109.89 | (-) (1+) | |||
| 338.80 10 | A | 205.13 9 | 100 | 133.668 | (-) | |||
| 350.6 4 | C | (4+) | 68.4 3 209.7 3 | 18.9 100 | [M1(+E2)] [E2] | 282.2 140.92 | (3+) (2+) | |
| 363.85 7 | A | 230.37 17 307.79 6 | 21 18 100 6 | 133.668 56.034 | (-) (1+) | |||
| 369.23 4 | A | 214.96 5 235.62 6 259.37 5 312.76 6 | 100 4 45 2 69 4 40 6 | 154.49 133.668 109.89 56.034 | (-) (1+) (1+) | |||
| 401.15 7 | A | 246.66 6 345.1 2 | 100 10 20 5 | 154.49 56.034 | (1+) | |||
| 441.7 4 | C | (5+) | 91.1 3 159.5 3 | 53.6 100 | [M1(+E2)] [E2] | 350.6 282.2 | (4+) (3+) | |
| 471.89 5 | A | 270.25 12 317.63 20 410.65 7 415.78 6 | 41 4 18 3 42 2 100 2 | 201.26 154.49 61.44 56.034 | (-) (1+) | |||
| 500.22 5 | A | 212.95 7 390.3 2 444.28 5 | 29 3 18 10 100 3 | 287.08 109.89 56.034 | (1+) (1+) | |||
| 538.08 11 | A | 369.3 2 404.46 14 476.6 2 | 23 9 100 9 95 36 | 168.71 133.668 61.44 | (-) (-) | |||
| 554.13 11 | A | 185.0 2 323.63 12 | 46 27 100 8 | 369.23 230.46 | ||||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 663.0 4 | C | (6+) | 221.3 3 312.4 3 | 13.9 100 | [M1(+E2)] [E2] | 441.7 350.6 | (5+) (4+) | |
| 708.2 5 | C | (7+) | 266.5 3 | 100 | [E2] | 441.7 | (5+) | |
| 717.22 9 | A | 583.6 2 607.33 11 661.1 2 | 10 3 100 8 14 5 | 133.668 109.89 56.034 | (-) (1+) (1+) | |||
| 830.67 11 | A | 569.6 2 600.2 2 720.8 2 774.6 2 | 68 32 100 36 95 36 27 14 | 261.08 230.46 109.89 56.034 | (1+) (1+) | |||
| 1060.1 5 | C | (8+) | 351.9 3 ? 397.1 3 | <4 100 | [M1(+E2)] [E2] | 708.2 663.0 | (7+) (6+) | |
| 1101.8 6 | C | (9+) | 393.6 3 | 100 | [E2] | 708.2 | (7+) | |
| 1229.04 10 | A | 757.15 13 1011.2 2 1173.0 2 | 74 32 100 42 63 42 | 471.89 217.86 56.034 | (1+) | |||
| 1252.47 7 | A | 535.2 2 1118.82 7 1196.3 2 | 18 10 100 5 41 13 | 717.22 133.668 56.034 | (-) (1+) | |||
| 1495.9 6 | C | (10+) | 435.8 3 | 100 | [E2] | 1060.1 | (8+) | |
| 1612.4 7 | C | (11+) | 510.6 3 | 100 | [E2] | 1101.8 | (9+) | |
| 1980.0 7 | C | (12+) | 484.1 3 | 100 | [E2] | 1495.9 | (10+) | |
| 2226.0 7 | C | (13+) | 613.6 3 | 100 | [E2] | 1612.4 | (11+) | |
E(level): From a least-squares fit to Eγ data, with normalized χ2=6.65> critical χ2=1.57. This fact is due to Eγ’s from 148Ba β- decay dataset, reported with higher than realistic precision
Jπ(level): For levels assigned in either band, assumed by 2009Lu11 (SF decay) based on the rotational character of this nucleus
I(γ): Relative photon branching from each level
M(γ): Based on α(K)exp measurements from γ’s from 148Ba β- decay; based on α(exp) measurements for γ’s from 252Cf SF decay
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - Band based on (2+), α=0. | |||||||
| 140.92 22 | (2+) | ||||||
| 350.6 4 | (4+) | 68.4 3 209.7 3 | 18.9 100 | [M1(+E2)] [E2] | 282.2 140.92 | (3+) (2+) | |
| 663.0 4 | (6+) | 221.3 3 312.4 3 | 13.9 100 | [M1(+E2)] [E2] | 441.7 350.6 | (5+) (4+) | |
| 1060.1 5 | (8+) | 351.9 3 ? 397.1 3 | <4 100 | [M1(+E2)] [E2] | 708.2 663.0 | (7+) (6+) | |
| 1495.9 6 | (10+) | 435.8 3 | 100 | [E2] | 1060.1 | (8+) | |
| 1980.0 7 | (12+) | 484.1 3 | 100 | [E2] | 1495.9 | (10+) | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - Band based on (3+), α=1 | |||||||
| 282.2 4 | (3+) | ||||||
| 441.7 4 | (5+) | 91.1 3 159.5 3 | 53.6 100 | [M1(+E2)] [E2] | 350.6 282.2 | (4+) (3+) | |
| 708.2 5 | (7+) | 266.5 3 | 100 | [E2] | 441.7 | (5+) | |
| 1101.8 6 | (9+) | 393.6 3 | 100 | [E2] | 708.2 | (7+) | |
| 1612.4 7 | (11+) | 510.6 3 | 100 | [E2] | 1101.8 | (9+) | |
| 2226.0 7 | (13+) | 613.6 3 | 100 | [E2] | 1612.4 | (11+) | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 47.21 | (1-,2-) | 47.22 4 | (M1) | 9.47 | α=9.47, α(K)=8.07 12, α(L)=1.109 16, α(M)=0.231 4, α(N)=0.0507 8, α(O)=0.00822 12, α(P)=0.000633 9, α(N+)=0.0595 9 | |
| 56.034 | (1+) | 67 ns 4 | 56.08 4 | E1 | 1.140 | B(E1)(W.u.)=9.6E-6 6, α=1.140, α(K)=0.959 14, α(L)=0.1436 21, α(M)=0.0297 5, α(N)=0.00637 9, α(O)=0.000971 14, α(P)=5.41E-5 8, α(N+)=0.00740 11 |
| 61.44 | (-) | 61.48 4 | M1,E2 | 8 | α=8 4, α(K)=4.1 4, α(L)=3 3, α(M)=0.7 6, α(N)=0.15 13, α(O)=0.021 17, α(P)=0.00026 4, α(N+)=0.17 14 | |
| 109.89 | (1+) | 48.44 4 | E1 | 1.682 | α=1.682, α(K)=1.408 20, α(L)=0.218 3, α(M)=0.0451 7, α(N)=0.00965 14, α(O)=0.001458 21, α(P)=7.79×10-5 11, α(N+)=0.01118 16 | |
| (1+) | 53.81 4 | M1,E2 | 13 | α=13 7, α(K)=5.66 16, α(L)=6 5, α(M)=1.3 12, α(N)=0.27 24, α(O)=0.04 4, α(P)=0.00037 6, α(N+)=0.3 3 | ||
| 133.668 | (-) | 86.44 4 | M1,E2 | 2.5 | α=2.5 9, α(K)=1.63 24, α(L)=0.7 5, α(M)=0.15 11, α(N)=0.032 24, α(O)=0.005 4, α(P)=0.000104 6, α(N+)=0.04 3 | |
| (-) | 133.53 4 | E2,M1 | 0.60 | α=0.60 12, α(K)=0.45 5, α(L)=0.11 6, α(M)=0.025 13, α(N)=0.005 3, α(O)=0.0008 4, α(P)=3.01×10-5 17, α(N+)=0.006 4 | ||
| 140.92 | (2+) | 84.7 3 | M1 | 1.74 | α=1.74 3, α(K)=1.49 3, α(L)=0.202 4, α(M)=0.0420 8, α(N)=0.00922 16, α(O)=0.00150 3, α(P)=0.0001158 21, α(N+)=0.01083 19 | |
| (2+) | 141.1 3 | [E1] | 0.0907 | α=0.0907, α(K)=0.0776 12, α(L)=0.01040 16, α(M)=0.00215 4, α(N)=0.000467 8, α(O)=7.38×10-5 12, α(P)=4.96E-6 8, α(N+)=0.000545 9 | ||
| 282.2 | (3+) | 141.3 3 | M1(+E2) | 0.50 | α=0.50 9, α(K)=0.38 4, α(L)=0.09 5, α(M)=0.020 10, α(N)=0.0042 21, α(O)=0.0006 3, α(P)=2.56×10-5 16, α(N+)=0.0049 24 | |
| 350.6 | (4+) | 68.4 3 | [M1(+E2)] | 5.6 | α=5.6 24, α(K)=3.1 4, α(L)=1.9 16, α(M)=0.4 4, α(N)=0.09 8, α(O)=0.013 10, α(P)=0.000197 19, α(N+)=0.10 9 | |
| (4+) | 209.7 3 | [E2] | 0.1517 | α=0.1517, α(K)=0.1173 18, α(L)=0.0271 4, α(M)=0.00584 9, α(N)=0.001254 19, α(O)=0.000188 3, α(P)=7.37×10-6 11, α(N+)=0.001449 22 | ||
| 441.7 | (5+) | 91.1 3 | [M1(+E2)] | 2.1 | α=2.1 7, α(K)=1.40 20, α(L)=0.5 4, α(M)=0.12 9, α(N)=0.025 18, α(O)=0.0037 25, α(P)=8.9×10-5 5, α(N+)=0.029 21 | |
| (5+) | 159.5 3 | [E2] | 0.386 | α=0.386, α(K)=0.283 5, α(L)=0.0814 13, α(M)=0.0177 3, α(N)=0.00378 6, α(O)=0.000555 9, α(P)=1.68×10-5 3, α(N+)=0.00436 7 | ||
| 663.0 | (6+) | 221.3 3 | [M1(+E2)] | 0.123 | α=0.123 5, α(K)=0.1002 21, α(L)=0.018 5, α(M)=0.0038 10, α(N)=0.00082 20, α(O)=0.00013 3, α(P)=7.1×10-6 9, α(N+)=0.00095 23 | |
| (6+) | 312.4 3 | [E2] | 0.0413 | α=0.0413, α(K)=0.0335 5, α(L)=0.00615 9, α(M)=0.001309 19, α(N)=0.000283 4, α(O)=4.35×10-5 7, α(P)=2.25E-6 4, α(N+)=0.000329 5 | ||
| 708.2 | (7+) | 266.5 3 | [E2] | 0.0686 | α=0.0686, α(K)=0.0548 8, α(L)=0.01091 16, α(M)=0.00233 4, α(N)=0.000503 8, α(O)=7.65×10-5 12, α(P)=3.59E-6 6, α(N+)=0.000583 9 | |
| 1060.1 | (8+) | 351.9 3 | [M1(+E2)] | 0.032 | α=0.032 4, α(K)=0.027 4, α(L)=0.00400 10, α(M)=0.00084 3, α(N)=0.000183 5, α(O)=2.91×10-5 5, α(P)=2.0E-6 4, α(N+)=0.000214 5 | |
| (8+) | 397.1 3 | [E2] | 0.0199 | α=0.0199, α(K)=0.01643 24, α(L)=0.00273 4, α(M)=0.000576 9, α(N)=0.0001250 18, α(O)=1.95×10-5 3, α(P)=1.139E-6 17, α(N+)=0.0001456 21 | ||
| 1101.8 | (9+) | 393.6 3 | [E2] | 0.0204 | α=0.0204, α(K)=0.01685 24, α(L)=0.00281 4, α(M)=0.000593 9, α(N)=0.0001287 19, α(O)=2.00×10-5 3, α(P)=1.167E-6 17, α(N+)=0.0001499 22 | |
| 1495.9 | (10+) | 435.8 3 | [E2] | 0.01516 | α=0.01516, α(K)=0.01261 18, α(L)=0.00202 3, α(M)=0.000426 6, α(N)=9.27×10-5 14, α(O)=1.452E-5 21, α(P)=8.83E-7 13, α(N+)=0.0001081 16 | |
| 1612.4 | (11+) | 510.6 3 | [E2] | 0.00974 | α=0.00974 14, α(K)=0.00816 12, α(L)=0.001246 18, α(M)=0.000262 4, α(N)=5.70×10-5 8, α(O)=9.00E-6 13, α(P)=5.80E-7 9, α(N+)=6.66E-5 10 | |
| 1980.0 | (12+) | 484.1 3 | [E2] | 0.01127 | α=0.01127, α(K)=0.00943 14, α(L)=0.001462 21, α(M)=0.000307 5, α(N)=6.69×10-5 10, α(O)=1.054E-5 15, α(P)=6.67E-7 10, α(N+)=7.81E-5 11 | |
| 2226.0 | (13+) | 613.6 3 | [E2] | 0.00600 | α=0.00600 9, α(K)=0.00507 8, α(L)=0.000737 11, α(M)=0.0001540 22, α(N)=3.36×10-5 5, α(O)=5.35E-6 8, α(P)=3.65E-7 6, α(N+)=3.93E-5 6 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (2-) | 1.26 s 8 % β- = 100 % β-n = 0.15 3 | Recommended delayed neutron emission probability (1993Ru01). Others: 0.24% 2 (1993Ru01), 0.13% 1 (1983Re10), 0.143% 15 (1986ReZR), 0.11% 1 (1986Wa17), 0.13% 2 (1984Ma39), <0.1% (1982Ga24). |
| 56.034 | (1+) | 67 ns 4 | J=1+ from log ft=4.8 via 0+ parent (1984Ch02); parentheses on adopted Jπ indicate uncertainty in β- branching estimates. E(level): J=1+ from log ft=4.8 via 0+ parent (1984Ch02); parentheses on adopted Jπ indicate uncertainty in β- branching estimates. |
| 109.89 | (1+) | J=1+ from log ft=5.0 via 0+ parent (1984Ch02); parentheses on adopted Jπ indicate uncertainty in β- branching estimates. E(level): J=1+ from log ft=5.0 via 0+ parent (1984Ch02); parentheses on adopted Jπ indicate uncertainty in β- branching estimates. | |
| 140.92 | (2+) | E(level): Band based on (2+), α=0. | |
| 282.2 | (3+) | E(level): Band based on (3+), α=1. | |
| 350.6 | (4+) | E(level): Band based on (2+), α=0. | |
| 441.7 | (5+) | E(level): Band based on (3+), α=1. | |
| 663.0 | (6+) | E(level): Band based on (2+), α=0. | |
| 708.2 | (7+) | E(level): Band based on (3+), α=1. | |
| 1060.1 | (8+) | E(level): Band based on (2+), α=0. | |
| 1101.8 | (9+) | E(level): Band based on (3+), α=1. | |
| 1495.9 | (10+) | E(level): Band based on (2+), α=0. | |
| 1612.4 | (11+) | E(level): Band based on (3+), α=1. | |
| 1980.0 | (12+) | E(level): Band based on (2+), α=0. | |
| 2226.0 | (13+) | E(level): Band based on (3+), α=1. |
| E(level) | E(gamma) | Comments |
| 133.668 | 133.53 | E(γ): Differs by 3σ or more from the value calculated from the energy difference of initial and final levels |
| 140.92 | 84.7 | M(γ): from α(exp)=1.51 49 (2009Lu11) |
| 217.86 | 84.02 | E(γ): Differs by 3σ or more from the value calculated from the energy difference of initial and final levels | 218.30 | E(γ): Differs by 3σ or more from the value calculated from the energy difference of initial and final levels |
| 230.46 | 96.58 | E(γ): Differs by 3σ or more from the value calculated from the energy difference of initial and final levels |
| 282.2 | 141.3 | M(γ): from α(exp)=0.54 18 (2009Lu11) |
| 471.89 | 270.25 | E(γ): Differs by 3σ or more from the value calculated from the energy difference of initial and final levels |
Levels: The bands observed in 148La are interpreted as aligned coupling of [πh11/2νh9/2]low spin to the deformed core rotor. (252Cf SF decay dataset, 2009Lu11)
Q-value: Q(β-n)=1234 21 (2012Wa38)