ADOPTED LEVELS for 117La

Author: Jean Blachot |  Citation: ENSDF |  Cutoff date: 1-Mar-2009 

 Full ENSDF file | Adopted Levels (PDF version) 


S(n)= 1.40×104 keV SYS(p)= -820 keV 3Q(α)= 2.8×103 keV SY
Reference: 2012WA38

General Comments:

This data set adopted from Proton Radioactivity in Z>50 Nuclides, α.α. Sonzogni, Nuclear Data Sheets 95, 1 (2002)

Experimental works:

2001So02: 64Zn(58Ni,p4n) E=310 MeV, recoil mass separator (Legnaro) with PPAC/DDSD detectors at focal plane.

2001Ma69: 64Zn(58Ni,p4n) E=295-310 MeV, recoil mass separator (FMA) with PPAC/DDSD detectors at focal plane.

Ground-state deformation: from the analysis of the proton radioactivity data, β≈0.3 was deduced (2001So02,2001Ma69)

Theoretical works:

2001Go20: β2=0.31, β4=0.02, S(p)=-0.5 MeV

1997Mo25: S(p)=-0.50 MeV, S(2p)=1.69 MeV, Q(α)=2.14 MeV, T1/2(β)=0.3883 s, T1/2(α)=5.385×106 y

1995Mo29: β2=0.290, β4=0.100, β6=-0.002

1995Ab38: β2=0.31, β4=0.08, S(p)=-0.5 MeV

1976Li30: S(p)=-1.01 MeV, Q(α)=2.68 MeV

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

Q-value: ΔQ(α)=405 (2009AuZZ)





E(level)
(keV)
Jπ(level) T1/2(level)
    0.0 (3/2+,3/2-) 23.5 ms 26 
% p = 93.9 7
% ε = 6.1 7
  151 12 ? (9/2+) 10 ms 5 
% p = 97.4 13
% ε = 2.6 13

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    0.0(3/2+,3/2-) 23.5 ms 26 
% p = 93.9 7
% ε = 6.1 7
E(p)=806 keV 5, Q(p)=823 keV 5 from 2001Ma69. Other: E(p)=783 keV 6, Q(p)=800 keV 6, (2001So02). The data from 2001Ma69 is adopted here simply because the proton energy spectrum has significantly less background than that from 2001So02.
E(level): E(p)=806 keV 5, Q(p)=823 keV 5 from 2001Ma69. Other: E(p)=783 keV 6, Q(p)=800 keV 6, (2001So02). The data from 2001Ma69 is adopted here simply because the proton energy spectrum has significantly less background than that from 2001So02.
  151(9/2+) 10 ms 5 
% p = 97.4 13
% ε = 2.6 13
Level observed only by 2001So02. It should have been seen by 2001Ma69, but was not.
E(level): Level observed only by 2001So02. It should have been seen by 2001Ma69, but was not.

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