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 SYS(n)= 13250 keV SYS(p)= -250 keV SYQ(α)= 2760 keV SY
Reference: 2021WA16

General 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)





E(level)
(keV)
Jπ(level) T1/2(level)
  0.0 (11/2-) 0.9 s 2 
% ε = 100
% εp = 0.2 +2-1

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments

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