ADOPTED LEVELS, GAMMAS for 157Pm
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 04-Jun-2021
Author: N. Nica | Citation: Nucl. Data Sheets 132, 1 (2016) | Cutoff date: 4-Dec-2015
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=4381 keV 8 | S(n)= 6202 keV 7 | S(p)= 9384 keV 7 | Q(α)= -3154 keV 14 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 9Be(238U,Fγ) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
| 0.0 | A | (5/2-) | 10.56 s 12 % β- = 100 | ||||
| 66.0 2 | A | (7/2-) | 66.0 2 | 100 | 0.0 | (5/2-) | |
| 151.0 3 | A | (9/2-) | 85.0 2 151 | 100 40 | 66.0 0.0 | (7/2-) (5/2-) | |
| 254.0 3 | A | (11/2-) | 103.0 2 188.0 2 | 100 17 33 17 | 151.0 66.0 | (9/2-) (7/2-) | |
| 379.0 3 | A | (13/2-) | 125.0 2 228.0 2 | 100 11 22 11 | 254.0 151.0 | (11/2-) (9/2-) | |
| 518.0 4 | A | (15/2-) | 139.0 2 264.0 5 | 86 29 100 29 | 379.0 254.0 | (13/2-) (11/2-) | |
| 683.0 4 | A | (17/2-) | 165.0 2 304.0 5 | 100 10 60 10 | 518.0 379.0 | (15/2-) (13/2-) | |
| 855.0 4 | A | (19/2-) | 172.0 2 337.0 5 | 100 17 100 17 | 683.0 518.0 | (17/2-) (15/2-) | |
| 1062.0 5 | A | (21/2-) | 207.0 2 379.0 5 | 100 25 50 25 | 855.0 683.0 | (19/2-) (17/2-) | |
| 1263.0 5 | A | (23/2-) | 201.0 2 408.0 5 | 100 25 75 25 | 1062.0 855.0 | (21/2-) (19/2-) | |
| 1515.0 6 | A | (25/2-) | 252.0 5 453.0 5 | 50 25 100 50 | 1263.0 1062.0 | (23/2-) (21/2-) | |
| 1739.0 7 | A | (27/2-) | 476.0 5 | 100 | 1263.0 | (23/2-) | |
Jπ(level): As given in 2018Bh07, based on band assignment in analogy with similar structure in neighboring odd-A Pm nuclei
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | Final Levels | ||
| Band 1 - π5/2[532],α=+1/2 | |||||||
| 0.0 | (5/2-) | 10.56 s 12 % β- = 100 | |||||
| 151.0 3 | (9/2-) | 85.0 2 151 | 100 40 | 66.0 0.0 | (7/2-) (5/2-) | ||
| 379.0 3 | (13/2-) | 125.0 2 228.0 2 | 100 11 22 11 | 254.0 151.0 | (11/2-) (9/2-) | ||
| 683.0 4 | (17/2-) | 165.0 2 304.0 5 | 100 10 60 10 | 518.0 379.0 | (15/2-) (13/2-) | ||
| 1062.0 5 | (21/2-) | 207.0 2 379.0 5 | 100 25 50 25 | 855.0 683.0 | (19/2-) (17/2-) | ||
| 1515.0 6 | (25/2-) | 252.0 5 453.0 5 | 50 25 100 50 | 1263.0 1062.0 | (23/2-) (21/2-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | Final Levels | ||
| Band 2 - π5/2[532],α=-1/2 | |||||||
| 66.0 2 | (7/2-) | ||||||
| 254.0 3 | (11/2-) | 103.0 2 188.0 2 | 100 17 33 17 | 151.0 66.0 | (9/2-) (7/2-) | ||
| 518.0 4 | (15/2-) | 139.0 2 264.0 5 | 86 29 100 29 | 379.0 254.0 | (13/2-) (11/2-) | ||
| 855.0 4 | (19/2-) | 172.0 2 337.0 5 | 100 17 100 17 | 683.0 518.0 | (17/2-) (15/2-) | ||
| 1263.0 5 | (23/2-) | 201.0 2 408.0 5 | 100 25 75 25 | 1062.0 855.0 | (21/2-) (19/2-) | ||
| 1739.0 7 | (27/2-) | 476.0 5 | 100 | 1263.0 | (23/2-) | ||
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (5/2-) | 10.56 s 12 % β- = 100 | E(level): π5/2[532],α=+1/2. |
| 66.0 | (7/2-) | E(level): π5/2[532],α=-1/2. | |
| 151.0 | (9/2-) | E(level): π5/2[532],α=+1/2. | |
| 254.0 | (11/2-) | E(level): π5/2[532],α=-1/2. | |
| 379.0 | (13/2-) | E(level): π5/2[532],α=+1/2. | |
| 518.0 | (15/2-) | E(level): π5/2[532],α=-1/2. | |
| 683.0 | (17/2-) | E(level): π5/2[532],α=+1/2. | |
| 855.0 | (19/2-) | E(level): π5/2[532],α=-1/2. | |
| 1062.0 | (21/2-) | E(level): π5/2[532],α=+1/2. | |
| 1263.0 | (23/2-) | E(level): π5/2[532],α=-1/2. | |
| 1515.0 | (25/2-) | E(level): π5/2[532],α=+1/2. | |
| 1739.0 | (27/2-) | E(level): π5/2[532],α=-1/2. |
| E(level) | E(gamma) | Comments |
1987Gr12, 1987An03: 157Pm nuclide identified as a fission fragment from 252Cf SF decay at the INEL-ISOL facility, Idhao Falls. Measured half-life of the decay of the g.s. of 157Pm, γ and β radiations. Later studies of the decay of 157Pm by the same experimental group at Idaho Falls: 1990An31, 1996Gr20, 1997Gr09.
Mass measurement: 2012Va02
Theoretical structure calculations: 2020Ra13, 2019Li55, 2018Bu13, 2017Sa02
All data for excited states are from 9Be(238U,Fγ) (2018Bh07)
Q-value: S(2n)=11500 8, S(2p)=21460 19 (2021Wa16)