ADOPTED LEVELS for 236Np
Author: Shaofei Zhu Citation: Nucl. Data Sheets 182, 2 (2022). Cutoff date: 1-Apr-2022
Q(β-)=4.8E+2 keV 5 | S(n)= 5.74E+3 keV 5 | S(p)= 4.83E+3 keV 5 | Q(α)= 5.01E+3 keV 5 |
Reference: 2021WA16 |
References: | |||
A | 240Am α decay |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
0 | A | 6(-) | 1.55×10+5 y 1 % β- = 12.0 1 % ε = 87.8 2 % α = 0.16 4 |
57 51 | A | 1(-) | 22.5 h 4 % β- = 49 1 % ε = 51 1 |
241 50 | A | (3-) | |
283 50 | A | (4-) | |
334 50 | A | (5-) |
Additional Level data and comments:
E(level) | Comments |
0 | Jπ(level): ε decay to 6+ level in 236U and β- decay to 6+ level in 236Pu; no ε decay and β- decay to 2+ or 0+ levels; large log ft values suggesting large K-hinderance and possible configuration=((π5/2[642])-(ν 7/2[743])) or ((π 5/2[523])-(ν 7/2[743])) while Gallagher-Moszkowski rule favors ((π5/2[642])-(ν 7/2[743])) with Jπ=6- for lower energy (1981Li30). Favored α decay from ((π5/2[523])-(ν 1/2[631]))3- with Iα and Eα in agreement with the rotational band built on this configuration. T1/2(level): other: T1/2(β-)=1.29×106 y +7-5 (1972En06). |
57 | E(level): deduced from E(β-,236Np(22.5 h))=537 keV 8 (1969Le05) and Q(β-,236Np(g.s.))=480 keV 50 (2021Wa16). Jπ(level): ε decay to 0+,2+ and 1- levels in 236U and β- decay to 0+ and 2+ levels in 236Pu; Gallagher-Moszkowski rule favors ((π5/2[642])-(ν 7/2[743])) with Jπ=1- for higher energy (1981Li30). T1/2(level): from 1969Le05 and 1949Ja01. |
241 | E(level): from 240Am α decay. π 5/2[523]+NU 1/2[631]. Jπ(level): Favored α decay from ((π5/2[523])-(ν 1/2[631]))3- with Iα and Eα in agreement with the rotational band built on this configuration. |
283 | E(level): from 240Am α decay. π 5/2[523]+NU 1/2[631]. Jπ(level): Favored α decay from ((π5/2[523])-(ν 1/2[631]))3- with Iα and Eα in agreement with the rotational band built on this configuration. |
334 | E(level): from 240Am α decay. π 5/2[523]+NU 1/2[631]. Jπ(level): Favored α decay from ((π5/2[523])-(ν 1/2[631]))3- with Iα and Eα in agreement with the rotational band built on this configuration. |
General Comments:
Fission T1/2, Cross section: 1998Er01, 1998Ro17, 1992Gr16, 1990Ro23, 1989Ko12, 1987Gr34 |
Q-value: S(2n)=12720 50, S(2p)=11540 50 (2021Wa16 ) |