Author: N. Nica |  Citation: Nucl. Data Sheets 176, 1 (2021) |  Cutoff date: 1-May-2021 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=4448.6 keV 14S(n)= 5521 keV 4S(p)= 8575 keV 6Q(α)= -1751.5 keV 15
Reference: 2021WA16

General Comments:

2020Or03 compiled for the XUNDL database by E.α. McCutchan (NNDC,BNL)


160Gd(n,p), E(n)=14.8 MeV; enriched target. Assignment based on observation of 75- and 173-keV gammas in 160Gd (1973Da05,1973Mo18).

252Cf SF decay; chemical separation (1982Ba76).

235U(n,F); on-line isotope separation (1986Ma12).

252Cf SF decay (2018Ha19, 2020Or03); fission fragments from CARIBU facility thermalized in a He gas catcher, separated with an isobar separator and implanted for measurement on a moving tape system. Measured masses and excitation energies of isomers using Canadian Penning Trap (phase-imaging ion-cyclotron-resonance technique)

Q-value: S(2n)=12365.6 22, S(2p)=18965.2 13 (2021Wa16)

Jπ(level) T1/2(level)
   0.0 (5-) 42.6 s 5 
% β- = 100
  93.0 12  (1-) 30.8 s 5 
% β- = 100

Jπ(level): The Gallagher-Moszkowski rules suggest that the g.s. in 160Eu would have K(=J)=5 that is confirmed by the 42.6 5 s activity discovered by 2018Ha19. The 30.8 s 5 activity also discovered by 2018Ha19 is associated by them with the K=0, J=1, 93.0 keV isomer decay. Both g.s and isomer have π=-. Previously J=1 was assigned to a 38 s 4 g.s. decay (2005Re18)

T1/2(level): Before 2018Ha19 the following values were measured whose weighted average of 38 s 4 had been uniquely assigned to the J=1 g.s. decay (2005Re05) (which now are split in the table between the two listed levels): 31 s 4 (1986Ma12), 41 s 4 (1982Ba76), 50 s 10 (1973Da05), 53 s 10 (1973Mo18). Other: ≈2.5 min (1961Ta08).

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Additional Level Data and Comments:


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