Authors: E. Browne, J. K. Tuli |  Citation: Nucl. Data Sheets 112, 1833 (2011) |  Cutoff date: 1-Jan-2011 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=-3.81×103 keV SYS(n)= 7366.3 keV 25S(p)= 5012.7 keV 18Q(α)= 6861.6 keV 10
Reference: 2012WA38

  A  250Fm α decay 

General Comments:

Calculations, systematics:

Alpha decay, half-life, branchings. Theory: 2010Is01, 2010Ni09, 2010Wa23, 2010Wa31, 2009De32, 2009Ni06, 2009Sa25, 2009Wa01, 2009Zh39, 2007Pe30, 2006De23, 2006Xu08, 2005Zh24, 2003Re32, 1993Bu09, 1991Bu05, 1986Po18.

Deformation parameters: 1991Pa11

Heavy particle decay: 1993Gr15, 1986Gr14

Spontaneous fission, fission barrier, half-life. Theory: 1983Ga05, 1992Bh03, 2010Ko36, 2010Sa09, 2009Mo18, 2008Xu06, 2007Po01, 2005Xu01, 2005Do19, 2004Ro01, 2010Ye05, 2009Ma07, 2009Ye01, 2001Mo13, 2000Ho27.

Atomic masses: 2010Dw01.

Nuclear moments. Calculated: 2010Vr01.

Nuclear Structure. Theory: 2009Al09, 2009Ye02, 2006Sh19, 2003Re22, 2002Re31.

Prompt neutron emission: 2008Sa24.

Alpha decay of high-spin isomers. Theory: 2007De53.

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

Q-value: Estimated: ΔQ(β-)=220 (2011AuZZ,2003Au03)

XREFJπ(level) T1/2(level)
      0A 0+ 35.7 h 5 
% α = 100.00
% SF = 2.4×10-4 4
% ε < 4×10-3
     44A (2+)  
  ≈2500  45 ns 10 
% SF ≤ 100

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Additional Level Data and Comments:

   2500 45 ns 10 
% SF ≤ 100
ε delayed fission from 246Es (1980Ga07).

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