ADOPTED LEVELS for 253Lr

Authors: E. Browne, J. K. Tuli |  Citation: Nucl. Data Sheets 114, 1041 (2013) |  Cutoff date: 1-Mar-2012 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-4980 keV SYS(n)= 8233 keV SYS(p)= 1584 keV SYQ(α)= 8918 keV 20
Reference: 2012WA38

References:
  A  257Db α decay (2.3 S)  B  257Db α decay (0.67 S)

General Comments:

Calculations, compilations:

g.s. properties: 1997Mo25, 1995Mo29, 2004Pa40

Single-particle Nilsson levels: 1994Cw02, 2004Pa40

Half-lives for α and β decay: 1997Mo25

1994Cw02 have calculated the following single-particle level sequence: g.s., 7/2[514]; 0.04 MeV, 1/2[521]; 0.15 MeV, 9/2[624]; 0.69 MeV, 5/2[512]; 0.88 MeV, 7/2[633].

2004Pa40 have calculated following single-particle level sequence 0.09 MeV, 9/2[624]; 0.10 MeV, 1/2[521]; 0.56 MeV, 5/2[512]; 0.71 MeV, 7/2[633]; 1.08 MeV, 3/2[521].

Assignment:

205Tl(50Ti,2n)257Db(α), parent of 249Md (1985He22,1986He28) granddaughter of 261Bh (1989Mu09)

Q-value: 2012Wa38: ΔQ(β-)=457 syst, ΔS(n)=312 syst, ΔS(p)=202 syst






E(level)
(keV)
XREFJπ(level) T1/2(level)
    0.0A  (7/2-) 0.57 s +7-6 
% α ≈ 98.7
% SF ≈ 1.3
  0+Y B (1/2-) 1.49 s +30-21 
% α = 92 5
% SF = 8 5
  107 18 A  (9/2-)  

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  0+Y(1/2-) 1.49 s +30-21 
% α = 92 5
% SF = 8 5
%α: from measured %SF=8 5 (2001He35).

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