ADOPTED LEVELS, GAMMAS for 154Pm
Author: N. Nica | Citation: Nucl. Data Sheets 200, 2 (2025) | Cutoff date: 22-Aug-2022
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=4189 keV 25 | S(n)= 5690 keV 27 | S(p)= 8225 keV 25 | Q(α)= -2391 keV 27 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 154Nd β- decay | B | 9Be(238U,Fγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0 | B | (4+) | 2.68 m 7 % β- = 100 | |||||
| 0+X | A | (1-) | 1.73 m 10 % β- = 100 | |||||
| 50.688+X 14 | A | (2-) | 50.691 22 | 100 | E2 | 0+X | (1-) | |
| 68.006+X 16 | A | (2-) | 17.3 68.000 22 | 100 | M1 | 50.688+X 0+X | (2-) (1-) | |
| 79.382+X 23 | A | (1-) | 28.7 3 79.38 15 | 12 100 | M1 M1,E2 | 50.688+X 0+X | (2-) (1-) | |
| 94.0 2 | B | (5+) | 94.0 2 | 100 | 0 | (4+) | ||
| 105.690+X 34 | A | (2-) | 37.63 6 105.7 3 | 100 12 | M1(+E2) | 68.006+X 0+X | (2-) (1-) | |
| 151.702+X 14 | A | (1+) | 45.99 4 72.319 22 83.697 20 101.019 20 151.703 20 | 11.7 10.4 53 45 100 | E1 E1 | 105.690+X 79.382+X 68.006+X 50.688+X 0+X | (2-) (1-) (2-) (2-) (1-) | |
| 154.93+X 6 | A | 87.7 3 104.20 9 | 0.7 100 | 68.006+X 50.688+X | (2-) (2-) | |||
| 173.81+X 5 | A | (2-) | 95.0 3 122.95 10 | 4.6 100 | M1,E2 | 79.382+X 50.688+X | (1-) (2-) | |
| 180.689+X 16 | A | (1+) | 130.002 20 180.693 22 | 73 100 | E1 E1 | 50.688+X 0+X | (2-) (1-) | |
| 185.492+X 27 | A | (0+,1+) | 30.8 3 33.8 2 79.75 25 106.4 3 117.480 25 134.85 12 185.0 3 | 1.5 15 11 2.9 100 3.3 3.5 | M1(+E2) E1 | 154.93+X 151.702+X 105.690+X 79.382+X 68.006+X 50.688+X 0+X | (1+) (2-) (1-) (2-) (2-) (1-) | |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 194.192+X 34 | A | (0+,1+) | 13.5 114.81 3 126.15 8 194.3 3 | 100 16 5 | (E1) | 180.689+X 79.382+X 68.006+X 0+X | (1+) (1-) (2-) (1-) | |
| 203.0 3 | B | (6+) | 109.0 2 203.0 5 | 100 14 93 14 | 94.0 0 | (5+) (4+) | ||
| 244.615+X 32 | A | (0+,1+) | 63.94 5 70.78 4 89.69 8 165.21 5 176.5 3 193.7 3 244.70 15 | 11.3 8.3 6.4 100 8.3 8.3 6.9 | M1 E1 | 180.689+X 173.81+X 154.93+X 79.382+X 68.006+X 50.688+X 0+X | (1+) (2-) (1-) (2-) (2-) (1-) | |
| 268.78+X 26 | A | 218.5 4 | 100 | 50.688+X | (2-) | |||
| 329.0 3 | B | (7+) | 126.0 2 235.0 5 | 46 9 100 11 | 203.0 94.0 | (6+) (5+) | ||
| 470.0 3 | B | (8+) | 141.0 2 267.0 5 | 86 17 100 11 | 329.0 203.0 | (7+) (6+) | ||
| 505.49+X 23 ? | A | 425.2 5 ? 454.8 5 ? | 83 100 | 79.382+X 50.688+X | (1-) (2-) | |||
| 597.39+X 30 | A | 416.7 3 | 100 | 180.689+X | (1+) | |||
| 627.9 4 | B | (9+) | 158.0 2 299.0 5 | 21 6 100 9 | 470.0 329.0 | (8+) (7+) | ||
| 633.85+X 9 | A | (0,1) | 453.4 3 482.1 3 554.6 3 566.2 5 | 23 17 100 20 | 180.689+X 151.702+X 79.382+X 68.006+X | (1+) (1+) (1-) (2-) | ||
| 652.36+X 27 | A | 383.5 5 471.7 3 | 50 100 | 268.78+X 180.689+X | (1+) | |||
| 682.31+X 8 | A | (0,1) | 176.5 3 414.0 4 501.8 3 508.7 4 527.3 4 602.8 3 613.6 4 | 8.6 15 31 43 31 100 12 | 505.49+X 268.78+X 180.689+X 173.81+X 154.93+X 79.382+X 68.006+X | (1+) (2-) (1-) (2-) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 699.99+X 30 ? | A | 505.8 3 ? | 100 | 194.192+X | (0+,1+) | |||
| 801.8 4 | B | (10+) | 174.0 2 331.0 5 | 42 16 100 13 | 627.9 470.0 | (9+) (8+) | ||
| 831.55+X 8 | A | (1+) | 197.9 3 587.0 4 637.4 3 645.9 5 650.3 3 763.66 15 780.79 15 831.59 15 | ≤2.6 4.3 19 5.2 18 10 100 84 | 633.85+X 244.615+X 194.192+X 185.492+X 180.689+X 68.006+X 50.688+X 0+X | (0,1) (0+,1+) (0+,1+) (0+,1+) (1+) (2-) (2-) (1-) | ||
| 850.227+X 29 | A | (1+) | 167.89 8 216.40 10 605.51 10 669.7 4 676.6 4 695.2 5 698.73 20 744.45 25 770.90 20 782.7 3 799.55 4 850.20 5 | 2.7 3.1 13 1.6 0.6 0.6 5.6 11 3.7 1.3 100 49 | 682.31+X 633.85+X 244.615+X 180.689+X 173.81+X 154.93+X 151.702+X 105.690+X 79.382+X 68.006+X 50.688+X 0+X | (0,1) (0,1) (0+,1+) (1+) (2-) (1+) (2-) (1-) (2-) (2-) (1-) | ||
| 906.96+X 5 | A | (0,1) | 662.2 4 721.46 5 726.27 10 755.34 12 827.51 15 839.0 3 | 3.0 100 54 49 6.4 35 | 244.615+X 185.492+X 180.689+X 151.702+X 79.382+X 68.006+X | (0+,1+) (0+,1+) (1+) (1+) (1-) (2-) | ||
| 990.8 4 | B | (11+) | 189.0 2 363.0 5 | 27 10 100 14 | 801.8 627.9 | (10+) (9+) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 1049.64+X 8 | A | (1+) | 804.96 25 855.4 3 864.16 15 868.95 20 944.08 20 970.0 3 981.4 3 999.06 20 1049.7 4 | 25 7.0 100 31 34 12 21 32 7.7 | 244.615+X 194.192+X 185.492+X 180.689+X 105.690+X 79.382+X 68.006+X 50.688+X 0+X | (0+,1+) (0+,1+) (0+,1+) (1+) (2-) (1-) (2-) (2-) (1-) | ||
| 1060.54+X 8 | A | (0,1) | 815.9 3 866.4 3 875.02 15 908.78 12 981.4 3 992.6 3 1060.6 3 | 5.7 25 43 100 10 14 6.4 | 244.615+X 194.192+X 185.492+X 151.702+X 79.382+X 68.006+X 0+X | (0+,1+) (0+,1+) (0+,1+) (1+) (1-) (2-) (1-) | ||
| 1198.8 7 | B | (12+) | 397.0 5 | 100 | 801.8 | (10+) | ||
| 1204.50+X 11 | A | (0,1) | 960.0 3 1010.2 3 1018.85 25 1024.1 3 1052.79 20 1136.5 4 1153.7 3 | 50 5.4 100 27 68 25 22 | 244.615+X 194.192+X 185.492+X 180.689+X 151.702+X 68.006+X 50.688+X | (0+,1+) (0+,1+) (0+,1+) (1+) (1+) (2-) (2-) | ||
| 1389.21+X 10 | A | (0,1) | 1194.7 3 1283.51 15 1310.4 4 1321.17 20 1389.22 20 | 4.1 100 13 96 31 | 194.192+X 105.690+X 79.382+X 68.006+X 0+X | (0+,1+) (2-) (1-) (2-) (1-) | ||
| 1415.8 7 | B | (13+) | 425.0 5 | 100 | 990.8 | (11+) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 1662.8 8 | B | (14+) | 464.0 5 | 100 | 1198.8 | (12+) | ||
| 1662.70+X 20 | A | (0,1) | 1417.6 3 1482.3 3 1583.8 5 | 320 100 100 | 244.615+X 180.689+X 79.382+X | (0+,1+) (1+) (1-) | ||
| 1689.99+X 31 | A | (0,1) | 1509.6 4 1583.8 5 | 100 24 | 180.689+X 105.690+X | (1+) (2-) | ||
| 1898.8 8 | B | (15+) | 483.0 5 | 100 | 1415.8 | (13+) | ||
E(level): From the 154Nd β- decay dataset (except the pseudolevels are not adopted since they may represent several actual levels), and from 9Be(238U,Fγ) dataset, which have no common levels. In each dataset the E(level) values were deduced from a least-squares fit to the respective γ energies
Jπ(level): For the 9Be(238U,Fγ) levels tentatively assigned by 2018Bh07 from the proposed band structure, with all Jπ values reassigned by evaluator based on (4+) for g.s. For the 154Nd β- decay levels the arguments are given in comments.
Jπ(level): For several levels, the configurations of 2012So10 (superseding 1990So08) are given; for other discussions of the configurations, see 1971Da28, 1972Ta13, 1973Pr05, and 1974Ya07.
E(γ): Unplaced γ’s are not included here, see 154Nd β- decay and 9Be(238U,Fγ) datasets
E(γ): From 154Nd β- decay (1993GrZZ) and 9Be(238U,Fγ) datasets. No γ is common to both datasets
M(γ): Based on data of 1993GrZZ in 154Nd β- decay dataset, from αK(exp), from IKx/Iγ ratio or from α(exp) based on intensity balances from γγ coincidence spectra.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - Signature α=0 band | |||||||
| 0 | (4+) | 2.68 m 7 % β- = 100 | |||||
| 203.0 3 | (6+) | ||||||
| 470.0 3 | (8+) | 141.0 2 267.0 5 | 86 17 100 11 | 329.0 203.0 | (7+) (6+) | ||
| 801.8 4 | (10+) | 174.0 2 331.0 5 | 42 16 100 13 | 627.9 470.0 | (9+) (8+) | ||
| 1198.8 7 | (12+) | 397.0 5 | 100 | 801.8 | (10+) | ||
| 1662.8 8 | (14+) | 464.0 5 | 100 | 1198.8 | (12+) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - Signature α=1 band | |||||||
| 94.0 2 | (5+) | ||||||
| 329.0 3 | (7+) | ||||||
| 627.9 4 | (9+) | 158.0 2 299.0 5 | 21 6 100 9 | 470.0 329.0 | (8+) (7+) | ||
| 990.8 4 | (11+) | 189.0 2 363.0 5 | 27 10 100 14 | 801.8 627.9 | (10+) (9+) | ||
| 1415.8 7 | (13+) | 425.0 5 | 100 | 990.8 | (11+) | ||
| 1898.8 8 | (15+) | 483.0 5 | 100 | 1415.8 | (13+) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 50.688+X | (2-) | 50.691 22 | E2 | 30.4 | α=30.4 4, α(K)=4.44 6, α(L)=20.17 29, α(M)=4.66 7, α(N)=1.011 14, α(O)=0.1253 18, α(P)=0.0002406 34 | |
| 68.006+X | (2-) | 68.000 22 | M1 | 4.71 | α=4.71 7, α(K)=3.99 6, α(L)=0.564 8, α(M)=0.1205 17, α(N)=0.0271 4, α(O)=0.00409 6, α(P)=0.000257 4 | |
| 79.382+X | (1-) | 28.7 3 | M1 | 9.07 | α=9.07 31, α(L)=7.15 25, α(M)=1.53 5, α(N)=0.344 12, α(O)=0.0517 18, α(P)=0.00324 11 | |
| (1-) | 79.38 15 | M1,E2 | 4.1 | α=4.1 11, α(K)=2.38 18, α(L)=1.4 10, α(M)=0.31 24, α(N)=0.07 5, α(O)=0.009 6, α(P)=1.3×10-4 4 | ||
| 105.690+X | (2-) | 37.63 6 | M1(+E2) | 6.E1 | α=6.E1 5, α(L)=4.E1 4, α(M)=10 10, α(N)=2.2 21, α(O)=0.28 25, α(P)=9.E-4 5 | |
| 151.702+X | (1+) | 72.319 22 | E1 | 0.643 | α=0.643 9, α(K)=0.539 8, α(L)=0.0819 11, α(M)=0.01743 24, α(N)=0.00384 5, α(O)=0.000539 8, α(P)=2.529×10-5 35 | |
| (1+) | 83.697 20 | E1 | 0.434 | α=0.434 6, α(K)=0.365 5, α(L)=0.0542 8, α(M)=0.01152 16, α(N)=0.00255 4, α(O)=0.000360 5, α(P)=1.748×10-5 25 | ||
| 173.81+X | (2-) | 122.95 10 | M1,E2 | 0.97 | α=0.97 11, α(K)=0.69 4, α(L)=0.22 11, α(M)=0.049 27, α(N)=0.011 6, α(O)=0.0014 7, α(P)=3.8×10-5 9 | |
| 180.689+X | (1+) | 130.002 20 | E1 | 0.1307 | α=0.1307 18, α(K)=0.1109 16, α(L)=0.01566 22, α(M)=0.00333 5, α(N)=0.000739 10, α(O)=0.0001068 15, α(P)=5.65×10-6 8 | |
| (1+) | 180.693 22 | E1 | 0.0535 | α=0.0535 7, α(K)=0.0455 6, α(L)=0.00628 9, α(M)=0.001333 19, α(N)=0.000297 4, α(O)=4.35×10-5 6, α(P)=2.413E-6 34 | ||
| 185.492+X | (0+,1+) | 33.8 2 | M1(+E2) | 1.0×102 | α=1.0×102 9, α(L)=8.E1 7, α(M)=17 16, α(N)=4 4, α(O)=0.5 4, α(P)=0.0012 8 | |
| (0+,1+) | 117.480 25 | E1 | 0.1723 | α=0.1723 24, α(K)=0.1460 20, α(L)=0.02081 29, α(M)=0.00442 6, α(N)=0.000981 14, α(O)=0.0001412 20, α(P)=7.33×10-6 10 | ||
| 194.192+X | (0+,1+) | 114.81 3 | (E1) | 0.1835 | α=0.1835 26, α(K)=0.1554 22, α(L)=0.02219 31, α(M)=0.00472 7, α(N)=0.001047 15, α(O)=0.0001504 21, α(P)=7.78×10-6 11 | |
| 244.615+X | (0+,1+) | 63.94 5 | M1 | 5.62 | α=5.62 8, α(K)=4.77 7, α(L)=0.675 10, α(M)=0.1442 20, α(N)=0.0325 5, α(O)=0.00489 7, α(P)=0.000308 4 | |
| (0+,1+) | 70.78 4 | E1 | 0.681 | α=0.681 10, α(K)=0.571 8, α(L)=0.0870 12, α(M)=0.01853 26, α(N)=0.00408 6, α(O)=0.000572 8, α(P)=2.67×10-5 4 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (4+) | 2.68 m 7 % β- = 100 | E(level): Signature α=0 band. |
| 94.0 | (5+) | E(level): Signature α=1 band. | |
| 203.0 | (6+) | E(level): Signature α=0 band. | |
| 329.0 | (7+) | E(level): Signature α=1 band. | |
| 470.0 | (8+) | E(level): Signature α=0 band. | |
| 627.9 | (9+) | E(level): Signature α=1 band. | |
| 801.8 | (10+) | E(level): Signature α=0 band. | |
| 990.8 | (11+) | E(level): Signature α=1 band. | |
| 1198.8 | (12+) | E(level): Signature α=0 band. | |
| 1415.8 | (13+) | E(level): Signature α=1 band. | |
| 1662.8 | (14+) | E(level): Signature α=0 band. | |
| 1898.8 | (15+) | E(level): Signature α=1 band. |
| E(level) | E(gamma) | Comments |
| 154.93+X | 87.7 | E(γ): Existence and placement of γ is questionable. |
| 173.81+X | 95.0 | E(γ): Existence and placement of γ is questionable. |
| 244.615+X | 89.69 | M(γ): E1 for 89.69γ is incompatible with M1 for 63.94γ and E1 for 70.78γ (with all multipolarities from 1993GrZZ in β- decay), reason for which no multipolarity is adopted for 89.69γ | 176.5 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 633.85+X | 566.2 | E(γ): Existence and placement of γ is questionable. |
| 682.31+X | 176.5 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity | 613.6 | E(γ): Existence and placement of γ is questionable. |
| 831.55+X | 645.9 | E(γ): Existence and placement of γ is questionable. |
| 850.227+X | 695.2 | E(γ): Existence and placement of γ is questionable. |
| 1049.64+X | 970.0 | E(γ): Existence and placement of γ is questionable. | 1049.7 | E(γ): Existence and placement of γ is questionable. |
| 1204.50+X | 1153.7 | E(γ): Existence and placement of γ is questionable. |
| 1389.21+X | 1310.4 | E(γ): Existence and placement of γ is questionable. | 1389.22 | E(γ): Existence and placement of γ is questionable. |
| 1662.70+X | 1417.6 | E(γ): Existence and placement of γ is questionable. | 1583.8 | E(γ): Multiply placed with undivided intensity. Existence and placement of γ is questionable. I(γ): Multiply placed with undivided intensity |
| 1689.99+X | 1583.8 | E(γ): Multiply placed with undivided intensity. Existence and placement of γ is questionable. I(γ): Multiply placed with undivided intensity |