ADOPTED LEVELS, GAMMAS for 117Ru

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 31-JUL-2015 

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

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=938×101 keV 59S(n)= 352×101 keV 59S(p)= 15350 keV SYQ(α)= -91800 keV SY
Reference: 2012WA38

References:
  A  117Ru IT decay (2.487 μs) 

General Comments:

1994Be24, 1997Be70, 1998Do08: 117Ru produced and in 9Be,Pb(238U,F) reaction at 750 MeV/nucleon, and identified event-by-event by measurements of energy loss, Time-of-flight (ToF), trajectory and magnetic rigidity. α total of 30 events were assigned to 117Ru in 1994Be24 with a cross-section of 11 μb for Pb target. α report from the same group: 1995CzZZ

2006Mo07: 117Ru produced in E136Xe=121.8 MeV/nucleon reaction. The A1900 fragment separator at NSCL-MSU facility was used to separate nuclei of interest. The secondary beam was implanted into β-decay arrangement consisting of Si(PIN) detectors and Si strip detectors (DSSD) and single-sided Si strip detectors (SSSD). Implantation and β decay events were time stamped and correlated, from which half-life of 117Ru was measured

2015Lo04: 117Ru nuclide produced at RIBF-RIKEN facility in 9Be(238U,F) reaction at E=345 MeV/nucleon with an average intensity of 6×1010 ions/s. Identification of 117Ru was made by determining atomic Z and mass-to-charge ratio α/Q, where Q=charge state of the ions. The selectivity of ions was based on magnetic rigidity, time-of-flight and energy loss. The separated nuclei were implanted at a rate of 50 ions/s in a stack of eight double-sided silicon-strip detector (WAS3ABi), surrounded by EURICA array of 84 HPGe detectors. Correlations were recorded between the implanted ions and β rays. The half-life of 117Ru isotope was measured from the correlated ion-β decay curves and maximum likelihood analysis technique as described in 2014Xu07. Comparison of measured half-lives with FRDM+QRPA, KTUY+GT2 and DF3+CQRPA theoretical calculations

Q-value: Estimated uncertainties (2012Wa38): 660 for S(p) and Q(α)

Q-value: S(2n)=9360 590, S(2p)=29350 710 (syst), Q(β-n)=3150 590 (2012Wa38)









E(level)
(keV)
XREF T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
    0.0A 151 ms 3 
% β- = 100
% β-n = ?
     
   57.7 4 A      57.8 5 
  100
(E1)
    0.0

  102.7 4 ?A     102.9 5 
  100
(D)
    0.0

  185.0 4 A 2.487 µs +58-55 
% IT = 100
   82.5 5 
  127.4 5 
  184.6 5 
   28 1 
    5.1 5 
  100 2 
(E1)
[D,E2]
(D,E2)
  102.7
   57.7
    0.0



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Additional Gamma Data:











E(level)
(keV)
T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
   57.7      57.8 5 (E1)0.67α=0.67
  102.7     102.9 5 (D)0.21α=0.21 8
  185.0 2.487 µs +58-55 
% IT = 100
   82.5 5 (E1)0.242α=0.242 5
2.487 µs +58-55 
% IT = 100
  127.4 5 [D,E2]0.31α=0.31 24
2.487 µs +58-55 
% IT = 100
  184.6 5 (D,E2)0.084α=0.084 60

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    0.0 151 ms 3 
% β- = 100
% β-n = ?
Theoretical T1/2=163.5 ms, %β-n=0.42 (2003Mo09).

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Additional Gamma Comments:

E(level)E(gamma)Comments
   57.7   57.8M(γ): assignment by the evaluator from intensity balance arguments
  102.7  102.9E(γ): Reverse ordering of the 90.8-136.3 γ cascade is also possible
M(γ): From 2012Ka36, based on consideration of Weisskopf estimates and intensity balances. See also 2012LaZT for possible E1 assignment for 184-keV transition; 2006ToZW propose E2
  185.0   82.5E(γ): Reverse ordering of the 90.8-136.3 γ cascade is also possible
M(γ): From 2012Ka36, based on consideration of Weisskopf estimates and intensity balances. See also 2012LaZT for possible E1 assignment for 184-keV transition; 2006ToZW propose E2
  127.4M(γ): assumed by the evaluator
  184.6M(γ): from 2012Ka36 based on Weisskopf estimates. Other: E1 assigned by 2012LaZT based on systematics of hindrance factors, which seem to rule out M2. From 2012Ka36, based on consideration of Weisskopf estimates and intensity balances. See also 2012LaZT for possible E1 assignment for 184-keV transition; 2006ToZW propose E2

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