ADOPTED LEVELS for 229Np

Authors: E. Browne, J. K. Tuli |  Citation: Nucl. Data Sheets 109, 2657 (2008) |  Cutoff date: 1-Jun-2008 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-3.61×103 keV 10S(n)= 7.89×103 keV 10S(p)= 2.73×103 keV 9Q(α)= 7.01×103 keV 5
Reference: 2012WA38

General Comments:

Assignment: 233U(41.6 MeV (p,5n)) recoil, parent 221Ac(7630α); parent 217Fr(8310α); parent 213At(9060α) 1968Ha14.

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

Q-value: ΔS(n)=210 syst (2003Au03)




E(level)
(keV)
T1/2(level)
  0.0 4.0 m 2 
% ε = 32 11
% α = 68 11

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  0.0 4.0 m 2 
% ε = 32 11
% α = 68 11
%α from α-α following α from 229Np and α from 225Th which results from 229U decay following 229Np(ε) decay (2004Sa05); 70% 10 (2000Sa52). %α/%ε>1 was deduced by 1968Ha14 from absence of 229U α groups in measured spectrum.
E(level): %α from α-α following α from 229Np and α from 225Th which results from 229U decay following 229Np(ε) decay (2004Sa05); 70% 10 (2000Sa52). %α/%ε>1 was deduced by 1968Ha14 from absence of 229U α groups in measured spectrum.

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