ADOPTED LEVELS for 244Np

Author: C.D. Nesaraja |  Citation: Nucl. Data Sheets 146, 387 (2017) |  Cutoff date: 31-Aug-2017 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=3.4×103 keV SYS(n)= 4.75×103 keV SYS(p)= 6.45×103 keV SYQ(α)= 3.870×103 keV SY
Reference: 2017WA10

General Comments:

Identification:

1987Mo29: 244Np produced from 244Pu(136Xe,X) reaction with E(136Xe)=835 MeV followed by chemical separation at the UNILAC accelerator at GSI, Darmstadt. Cross section for the production of 244Np is 1.4 mb

Theoretical calculations:

2015GoZV: Energy levels <190 keV calculated using the 3-step Two Quasiparticle-Rotor-Model (TQRM).

2009Mo18: Calculated fission barrier heights

1995Mo29: Calculated deformation parameters

Q-value: ΔQ-=300, ΔSN=300, ΔSP=420, ΔQA=360 (syst, 2017Wa10)

Q-value: S(2n)=10360 syst 360 (2017Wa10).





E(level)
(keV)
Jπ(level) T1/2(level)
  0.0 (7-) 2.29 m 16 
% β- = 100

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  0.0(7-) 2.29 m 16 
% β- = 100
Only β- decay has been observed.
E(level): Only β- decay has been observed.

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