ADOPTED LEVELS for 231Pu
Authors: Balraj Singh, Jagdish K. Tuli, and Edgardo Browne | Citation: Nucl. Data Sheets 185, 560 (2022) | Cutoff date: 31-Aug-2022
Full ENSDF file | Adopted Levels (PDF version)
| S(n)= 6695 keV 26 | S(p)= 4220 keV 60 | Q(α)= 6839 keV 20 | |||
| Reference: 2021WA16 |
| References: | |||
| A | 235Cm α decay (5.0 M) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0 | A | (3/2+) | 8.6 m 5 % ε = 90 +3-7 % α = 10 +7-3 |
| 324 28 ? | A |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
1999La14: 231Pu produced in 233U(3He,5n),E=42-47 MeV; followed by chemical separation. Measured Eα; αα-correlations between the parent nucleus and the descendant nuclei to identify 231Pu. The measured activities from the α-decay chains: 231Pu |) 227U |) 223Th |) 219Ra |) 215Rn, and 231Np |) 227Pa |) 223Ac |) 219Fr |) 215At, the latter from 231Pu ε decay. The 6.72 MeV α-particle group from 231Pu α decay was only partially resolved from other lines in the spectrum
1985Ar25, 1985Po09: 197Au(40Ar,dα),E=60 MeV/nucleon; measured measured dα(θ), azimuthal (particle)(particle)(|f)
Theoretical calculations: consult the NSR database (www.nndc.bnl.gov/nsr/) for 18 primary references dealing with half-lives and other aspects of radioactive decays, and two for nuclear structure. These references are listed in ’document’ records, which can be accessed through on-line ENSDF database at www.nndc.bnl.gov/ensdf/
Q-value: S(2n)=15230 60, S(2p)=7480 23, Q(ε)=2680 60 (2021Wa16)