ADOPTED LEVELS, GAMMAS for 154Nd
Author: N. Nica | Citation: Nucl. Data Sheets 200, 2 (2025) | Cutoff date: 22-Aug-2022
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=2687 keV 25 | S(n)= 6320.5 keV 29 | S(p)= 11300 keV 12 | Q(α)= -3158 keV 12 | ||
Reference: 2021WA16 |
References: | |||
A | 154Pr β- decay | B | 252Cf,248Cm SF decay |
C | 239Pu(n,Fγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABC | 0+ | 25.9 s 2 % β- = 100 | |||||
70.80 10 | ABC | 2+ | 7.7 ns 20 | 70.8 1 | 100 | [E2] | 0.0 | 0+ |
233.24 14 | ABC | 4+ | 162.4 1 | 100 | [E2] | 70.80 | 2+ | |
481.4 4 | BC | 6+ | 248.4 3 | 100 | [E2] | 233.24 | 4+ | |
808.7 5 | BC | 8+ | 327.3 3 | 100 | [E2] | 481.4 | 6+ | |
961.4 5 | A C | (1-) | 891.2 10 961.8 10 | 100 19 48 14 | 70.80 0.0 | 2+ 0+ | ||
1002.83 21 | ABC | (2-) | 932.11 24 | 100 | 70.80 | 2+ | ||
1027.68 19 | A C | (3-) | 794.4 3 956.90 21 | 100 7 92 22 | 233.24 70.80 | 4+ 2+ | ||
1128.26 22 | ABC | (4-) | 125.5 3 895.04 24 | 18 3 100 18 | 1002.83 233.24 | (2-) 4+ | ||
1162.9 3 | C | (5-) | 682? 929.4 3 | 100 | 481.4 233.24 | 6+ 4+ | ||
1209.1 6 | BC | 10+ | 400.4 3 | 100 | [E2] | 808.7 | 8+ | |
1297.97 22 | C | (4-) | 3.0 µs 3 | 134.8 3 169.8 3 270.3 3 295.3 3 | 17.8 22 100 16 47 9 33 7 | [M1+E2] [M1+E2] [M1+E2] [E2] | 1162.9 1128.26 1027.68 1002.83 | (5-) (4-) (3-) (2-) |
1325.4 4 | BC | (6-) | 197.2 3 843.8 | 100 57 | 1128.26 481.4 | (4-) 6+ | ||
1348.8 8 ? | B | (5-) | 870 1113 | 100 ≈14 | 481.4 233.24 | 6+ 4+ | ||
1384.3 3 | C | (5-) | 86.3 2 | 100 | 1297.97 | (4-) | ||
1488.0 4 | C | (6-) | 103.8 2 190? | 100 50 7 | 1384.3 1297.97 | (5-) (4-) | ||
1523.7 4 | A | 520.7 4 562.5 4 | 36.1 24 100 4 | 1002.83 961.4 | (2-) (1-) | |||
1583.8 8 | A | 581.0 7 | 100 | 1002.83 | (2-) | |||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1593.7 5 | BC | (8-) | 268.3 3 784.8? | 100 | 1325.4 808.7 | (6-) 8+ | ||
1608.7 4 | C | (7-) | 120.7 2 224 | 100 50 8 | 1488.0 1384.3 | (6-) (5-) | ||
1675.5 6 | BC | 12+ | 1.9 ps | 466.4 3 | 100 | [E2] | 1209.1 | 10+ |
1746.8 5 | C | (8-) | 138.1 2 259? | 100 40 18 | 1608.7 1488.0 | (7-) (6-) | ||
1902.4 5 | C | (9-) | 155.6 2 293 | 100 29 71 | 1746.8 1608.7 | (8-) (7-) | ||
1931.8 6 | BC | (10-) | 338.1 3 | 100 | 1593.7 | (8-) | ||
2074.6 6 | C | (10-) | 172.2 2 328 | 100 33 25 | 1902.4 1746.8 | (9-) (8-) | ||
2194.1 10 | A | 670.4 9 | 100 | 1523.7 | ||||
2200.8 7 | BC | 14+ | 1.0 ps | 525.3 3 | 100 | [E2] | 1675.5 | 12+ |
2263.8 6 | C | (11-) | 189.2 2 361? | 100 50 56 | 2074.6 1902.4 | (10-) (9-) | ||
2337.4 7 | BC | (12-) | 405.6 3 | 100 | 1931.8 | (10-) | ||
2468.0 6 | C | (12-) | 204.2 2 394 | 100 50 14 | 2263.8 2074.6 | (11-) (10-) | ||
2691.6 7 | C | (13-) | 223.5 2 428 | 100 40 100 | 2468.0 2263.8 | (12-) (11-) | ||
2777.3 8 | BC | 16+ | 0.69 ps | 576.5 3 | 100 | [E2] | 2200.8 | 14+ |
2807.3 7 | BC | (14-) | 469.9 3 | 100 | 2337.4 | (12-) | ||
2950.3 7 | C | (14-) | 258.7 2 | 100 | 2691.6 | (13-) | ||
3337.8 8 | BC | (16-) | 530.5 3 | 100 | 2807.3 | (14-) | ||
3399.3? | BC | (18+) | 619.6 9 ? | 100 | 2777.3 | 16+ |
E(level): From a least-squares fit to the listed γ energies.
Jπ(level): For the members of the yrast and the side bands: from (n,Fγ) based on considerations of the expected band structure and the deexcitation characteristics of spontaneous-fission fragments. Individual arguments are given for levels reported only in the 154Pr β- decay.
T1/2(level): From 1994Sm07 in 252Cf,248Cm SF decay unless noted otherwise.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - Kπ=0+ band | |||||||
0.0 | 0+ | 25.9 s 2 % β- = 100 | |||||
70.80 10 | 2+ | 7.7 ns 20 | 70.8 1 | 100 | [E2] | 0.0 | 0+ |
233.24 14 | 4+ | 162.4 1 | 100 | [E2] | 70.80 | 2+ | |
481.4 4 | 6+ | 248.4 3 | 100 | [E2] | 233.24 | 4+ | |
808.7 5 | 8+ | 327.3 3 | 100 | [E2] | 481.4 | 6+ | |
1209.1 6 | 10+ | 400.4 3 | 100 | [E2] | 808.7 | 8+ | |
1675.5 6 | 12+ | 1.9 ps | 466.4 3 | 100 | [E2] | 1209.1 | 10+ |
2200.8 7 | 14+ | 1.0 ps | 525.3 3 | 100 | [E2] | 1675.5 | 12+ |
2777.3 8 | 16+ | 0.69 ps | 576.5 3 | 100 | [E2] | 2200.8 | 14+ |
3399.3 | (18+) | 619.6 9 ? | 100 | 2777.3 | 16+ | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - Kπ=(1-) band, α=0 | |||||||
1002.83 21 | (2-) | ||||||
1128.26 22 | (4-) | 125.5 3 895.04 24 | 18 3 100 18 | 1002.83 233.24 | (2-) 4+ | ||
1325.4 4 | (6-) | 197.2 3 843.8 | 100 57 | 1128.26 481.4 | (4-) 6+ | ||
1593.7 5 | (8-) | 268.3 3 784.8? | 100 | 1325.4 808.7 | (6-) 8+ | ||
1931.8 6 | (10-) | 338.1 3 | 100 | 1593.7 | (8-) | ||
2337.4 7 | (12-) | 405.6 3 | 100 | 1931.8 | (10-) | ||
2807.3 7 | (14-) | 469.9 3 | 100 | 2337.4 | (12-) | ||
3337.8 8 | (16-) | 530.5 3 | 100 | 2807.3 | (14-) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 3 - Kπ=(1-) band, α=1 | |||||||
961.4 5 | (1-) | ||||||
1027.68 19 | (3-) | 794.4 3 956.90 21 | 100 7 92 22 | 233.24 70.80 | 4+ 2+ | ||
1162.9 3 | (5-) | 682? 929.4 3 | 100 | 481.4 233.24 | 6+ 4+ | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 4 - Kπ=(4-) band, α=0 | |||||||
1297.97 22 | (4-) | 3.0 µs 3 | |||||
1488.0 4 | (6-) | 103.8 2 190? | 100 50 7 | 1384.3 1297.97 | (5-) (4-) | ||
1746.8 5 | (8-) | 138.1 2 259? | 100 40 18 | 1608.7 1488.0 | (7-) (6-) | ||
2074.6 6 | (10-) | 172.2 2 328 | 100 33 25 | 1902.4 1746.8 | (9-) (8-) | ||
2468.0 6 | (12-) | 204.2 2 394 | 100 50 14 | 2263.8 2074.6 | (11-) (10-) | ||
2950.3 7 | (14-) | 258.7 2 | 100 | 2691.6 | (13-) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 5 - Kπ=(4-) band, α=1 | |||||||
1384.3 3 | (5-) | ||||||
1608.7 4 | (7-) | 120.7 2 224 | 100 50 8 | 1488.0 1384.3 | (6-) (5-) | ||
1902.4 5 | (9-) | 155.6 2 293 | 100 29 71 | 1746.8 1608.7 | (8-) (7-) | ||
2263.8 6 | (11-) | 189.2 2 361? | 100 50 56 | 2074.6 1902.4 | (10-) (9-) | ||
2691.6 7 | (13-) | 223.5 2 428 | 100 40 100 | 2468.0 2263.8 | (12-) (11-) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
70.80 | 2+ | 7.7 ns 20 | 70.8 1 | [E2] | 7.79 | B(E2)(W.u.)=95 25, α=7.79, α(K)=2.96 5, α(L)=3.76 6, α(M)=0.861 14, α(N)=0.186 3, α(O)=0.0235 4, α(P)=0.0001258 18 |
233.24 | 4+ | 162.4 1 | [E2] | 0.398 | α=0.398, α(K)=0.279 4, α(L)=0.0931 14, α(M)=0.0209 3, α(N)=0.00454 7, α(O)=0.000607 9, α(P)=1.353×10-5 19 | |
481.4 | 6+ | 248.4 3 | [E2] | 0.0957 | α=0.0957, α(K)=0.0738 11, α(L)=0.0172 3, α(M)=0.00379 6, α(N)=0.000830 13, α(O)=0.0001150 17, α(P)=3.92×10-6 6 | |
808.7 | 8+ | 327.3 3 | [E2] | 0.0400 | α=0.0400, α(K)=0.0320 5, α(L)=0.00630 9, α(M)=0.001375 20, α(N)=0.000303 5, α(O)=4.29×10-5 7, α(P)=1.78E-6 3 | |
1209.1 | 10+ | 400.4 3 | [E2] | 0.0219 | α=0.0219, α(K)=0.0179 3, α(L)=0.00319 5, α(M)=0.000692 10, α(N)=0.0001528 22, α(O)=2.20×10-5 4, α(P)=1.023E-6 15 | |
1297.97 | (4-) | 3.0 µs 3 | 134.8 3 | [M1+E2] | 0.68 | α=0.68 8, α(K)=0.506 13, α(L)=0.138 67, α(M)=0.031 16, α(N)=0.0067 34, α(O)=9.2×10-4 41, α(P)=2.8E-5 6 |
(4-) | 3.0 µs 3 | 169.8 3 | [M1+E2] | 0.330 | α=0.330 13, α(K)=0.257 15, α(L)=0.057 20, α(M)=0.0126 47, α(N)=0.0028 10, α(O)=3.9×10-4 12, α(P)=1.5E-5 3 | |
(4-) | 3.0 µs 3 | 270.3 3 | [M1+E2] | 0.081 | α=0.081 9, α(K)=0.067 10, α(L)=0.0115 11, α(M)=0.0025 3, α(N)=0.00055 6, α(O)=8.0×10-5 5, α(P)=4.0E-6 10 | |
(4-) | 3.0 µs 3 | 295.3 3 | [E2] | 0.0550 | α=0.0550, α(K)=0.0435 7, α(L)=0.00907 14, α(M)=0.00199 3, α(N)=0.000437 7, α(O)=6.14×10-5 9, α(P)=2.38E-6 4 | |
1675.5 | 12+ | 1.9 ps | 466.4 3 | [E2] | 0.01423 | B(E2)(W.u.)=2.7×102, α=0.01423, α(K)=0.01173 17, α(L)=0.00197 3, α(M)=0.000425 6, α(N)=9.40E-5 14, α(O)=1.366E-5 20, α(P)=6.83E-7 10 |
2200.8 | 14+ | 1.0 ps | 525.3 3 | [E2] | 0.01032 | B(E2)(W.u.)=2.9×102, α=0.01032, α(K)=0.00857 12, α(L)=0.001378 20, α(M)=0.000296 5, α(N)=6.57E-5 10, α(O)=9.61E-6 14, α(P)=5.04E-7 7 |
2777.3 | 16+ | 0.69 ps | 576.5 3 | [E2] | 0.00810 | B(E2)(W.u.)=2.6×102, α=0.00810, α(K)=0.00676 10, α(L)=0.001054 15, α(M)=0.000226 4, α(N)=5.02E-5 7, α(O)=7.38E-6 11, α(P)=4.01E-7 6 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 0+ | 25.9 s 2 % β- = 100 | E(level): Kπ=0+ band. |
70.80 | 2+ | 7.7 ns 20 | E(level): Kπ=0+ band. |
233.24 | 4+ | E(level): Kπ=0+ band. | |
481.4 | 6+ | E(level): Kπ=0+ band. | |
808.7 | 8+ | E(level): Kπ=0+ band. | |
961.4 | (1-) | E(level): Kπ=(1-) band, α=1. | |
1002.83 | (2-) | E(level): Kπ=(1-) band, α=0. | |
1027.68 | (3-) | E(level): Kπ=(1-) band, α=1. | |
1128.26 | (4-) | E(level): Kπ=(1-) band, α=0. | |
1162.9 | (5-) | E(level): Kπ=(1-) band, α=1. | |
1209.1 | 10+ | E(level): Kπ=0+ band. | |
1297.97 | (4-) | 3.0 µs 3 | Dominant configuration=ν5/2[642]~#ν3/2[521] (2009Si21, (n,Fγ)). E(level): Kπ=(4-) band, α=0. |
1325.4 | (6-) | E(level): Kπ=(1-) band, α=0. | |
1384.3 | (5-) | E(level): Kπ=(4-) band, α=1. | |
1488.0 | (6-) | E(level): Kπ=(4-) band, α=0. | |
1593.7 | (8-) | E(level): Kπ=(1-) band, α=0. | |
1608.7 | (7-) | E(level): Kπ=(4-) band, α=1. | |
1675.5 | 12+ | 1.9 ps | E(level): Kπ=0+ band. |
1746.8 | (8-) | E(level): Kπ=(4-) band, α=0. | |
1902.4 | (9-) | E(level): Kπ=(4-) band, α=1. | |
1931.8 | (10-) | E(level): Kπ=(1-) band, α=0. | |
2074.6 | (10-) | E(level): Kπ=(4-) band, α=0. | |
2200.8 | 14+ | 1.0 ps | E(level): Kπ=0+ band. |
2263.8 | (11-) | E(level): Kπ=(4-) band, α=1. | |
2337.4 | (12-) | E(level): Kπ=(1-) band, α=0. | |
E(level) | Jπ(level) | T1/2(level) | Comments |
2468.0 | (12-) | E(level): Kπ=(4-) band, α=0. | |
2691.6 | (13-) | E(level): Kπ=(4-) band, α=1. | |
2777.3 | 16+ | 0.69 ps | E(level): Kπ=0+ band. |
2807.3 | (14-) | E(level): Kπ=(1-) band, α=0. | |
2950.3 | (14-) | E(level): Kπ=(4-) band, α=0. | |
3337.8 | (16-) | E(level): Kπ=(1-) band, α=0. | |
3399.3 | (18+) | E(level): Kπ=0+ band. |
E(level) | E(gamma) | Comments |
70.80 | 70.8 | E(γ): from 154Pr β- decay. Others: 70.8 1 from 252Cf,248Cm SF decay and 70.8 3 from (n,Fγ) |
233.24 | 162.4 | E(γ): from 154Pr β- decay. Others: 162.4 1 from 252Cf,248Cm SF decay and 162.4 3 from (n,Fγ) |
481.4 | 248.4 | E(γ): from (n,Fγ). Other: 248.6 from 252Cf,248Cm SF decay |
808.7 | 327.3 | E(γ): from (n,Fγ). Other: 328.2 from 252Cf,248Cm SF decay |
961.4 | 891.2 | E(γ): from 154Pr β- decay | 961.8 | E(γ): from 154Pr β- decay |
1002.83 | 932.11 | E(γ): weighted average of 932.3 4 from 154Pr β- decay and 932.0 3 from (n,Fγ). Other: 931.8 (252Cf,248Cm SF decay) |
1027.68 | 794.4 | E(γ): weighted average of 794.3 4 from 154Pr β- decay and 794.5 3 from (n,Fγ) I(γ): weighted average of 100 7 from 154Pr β- decay and 100 23 from (n,Fγ) | 956.90 | E(γ): weighted average of 956.9 3 from 154Pr β- decay and 956.9 3 from (n,Fγ) I(γ): weighted average of 91 30 from 154Pr β- decay and 92 31 from (n,Fγ) |
1128.26 | 125.5 | E(γ): from (n,Fγ). Other: 125.8 from 252Cf,248Cm SF decay I(γ): from (n,Fγ) | 895.04 | E(γ): weighted average of 895.1 4 from 154Pr β- decay and 895.0 3 from (n,Fγ) I(γ): from (n,Fγ) |
1162.9 | 682 | I(γ): from (n,Fγ) |
1325.4 | 197.2 | E(γ): from (n,Fγ). Other: 197.5 from 252Cf,248Cm SF decay I(γ): from 252Cf,248Cm SF decay |
1593.7 | 268.3 | E(γ): from (n,Fγ). Other: 268.5 from 252Cf,248Cm SF decay I(γ): from 252Cf,248Cm SF decay | 784.8 | E(γ): from 252Cf,248Cm SF decay |
1675.5 | 466.4 | E(γ): from (n,Fγ). Other: 466.5 from 252Cf,248Cm SF decay |
1931.8 | 338.1 | E(γ): from (n,Fγ). Other: 338.3 from 252Cf,248Cm SF decay |
2200.8 | 525.3 | E(γ): from (n,Fγ). Other: 525.1 from 252Cf,248Cm SF decay |
2337.4 | 405.6 | E(γ): from (n,Fγ). Other: 405.8 from 252Cf,248Cm SF decay |
2777.3 | 576.5 | E(γ): from (n,Fγ). Other: 576.6 from 252Cf,248Cm SF decay |
2807.3 | 469.9 | E(γ): from (n,Fγ). Other: 470.0 from 252Cf,248Cm SF decay |
3337.8 | 530.5 | E(γ): from (n,Fγ). Other: 530.7 from 252Cf,248Cm SF decay |
3399.3 | 619.6 | E(γ): from (n,Fγ). Other: 620.4 from 252Cf,248Cm SF decay |