ADOPTED LEVELS for 149Tm
Authors: Balraj Singh and Jun Chen | Citation: Nucl. Data Sheets 185, 2 (2022) | Cutoff date: 23-Aug-2022
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-10610 keV SY | S(n)= 13250 keV SY | S(p)= -250 keV SY | Q(α)= 2760 keV SY | ||
| Reference: 2021WA16 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0.0 | (11/2-) | 0.9 s 2 % ε = 100 % εp = 0.2 +2-1 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
149Tm isotope produced and identified by 1987To12.
153Lu isomers with h11/2 and s1/2 orbitals have been identified from 157Ta α decay (1997Ir01). It is possible that these isomers decay by α decay to 149Tm. Gross theory of β decay (1973Ta30) predicts %α≈70, but calculations of 2019Mo01 give T1/2(153Lu α decay)=10×1016.67 s, suggesting negligible %α decay
Theoretical studies: consult the NSR database at www.nndc.bnl.gov/nsr/ for three references for structure and two for radioactive decay listed under ’document records’ which can be accessed through web retrieval of the ENSDF database at www.nndc.bnl.gov/ensdf/
Q-value: ΔQ(β-)=360, ΔS(n)=ΔS(p)=ΔQ(α)=200 (syst,2021Wa16)
Q-value: Q(ε)=9800 200, Q(εp)=6760 220, S(2n)=24110 200, S(2p)=2760 200 (syst,2021Wa16)