ADOPTED LEVELS for 249Md

Author: Khalifeh Abusaleem |  Citation: Nucl. Data Sheets 112, 2129 (2011) |  Cutoff date: 31-Dec-2010 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-4.5×103 keV SYS(n)= 8.0×103 keV SYS(p)= 1.95×103 keV SYQ(α)= 8441 keV 18
Reference: 2012WA38

References:
  A  253Lr α decay (1.42 S)  B  253Lr α decay (0.64 S)

General Comments:

Calculations, compilations:

Favored α decay: 1993Bu09

Ground state properties: 1997Mo25, 1995Mo29

Single-particle Nilsson levels: 2004Pa04, 1994Cw02

2004Pa40 calculate the following single-particle level sequence: g.s. 1/2[521], 0.30 MeV 7/2[514], 0.39 MeV 7/2[633], 0.57 MeV 9/2[624], 0.68 MeV 3/2[521], 1.03 MeV 5/2[512]

1994Cw02 calculate the following single-particle level sequence: g.s. 1/2[521], 0.31 MeV 7/2[514], 0.43 MeV 7/2[633], 0.68 MeV 9/2[624], 0.83 MeV 3/2[521]

Assignment: 241Am(12C,4n), 243Am(12C,6n), parent of 245Es, grandparent of 245Cf (1973Es01).

2001He35: Observed two α’s: Eα1=8023 keV with intensity of 0.79 12 FWHM=40.1 keV and Eα2=8080 keV with intensity of 0.21, FWHM=26.3. This together with the half lives indicate the existence of two isomers

Both 253Lr isomers are parents of 24 s 249Md (1999He11)

Q-value: Note: Current evaluation has used the following Q record

Q-value: -4490 syst 7894 syst 1870 syst 8463 syst 2009AuZZ

Q-value: Estimated ΔQ(β-)=358, ΔS(n)=375, ΔS(p)=301, ΔQ(α)=100






E(level)
(keV)
XREFJπ(level) T1/2(level)
  0.0A  (7/2-) 21.7 s 20 
% α > 60
% ε ≤ 40
  0.0+XA  (1/2-) 1.9 s 9 
  0.0+Y B  

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  0.0(7/2-) 21.7 s 20 
% α > 60
% ε ≤ 40
Calculated: T1/2(α)=68 s, T1/2(ε+β+)=90 s (1997Mo25).

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