Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 30-JUN-2017 

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 30-NOV-2013 

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 30-NOV-2006 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=11470 keV SYS(n)= 4060 keV SYS(p)= 13540 keV SYQ(α)= -9780 keV SY
Reference: 2017WA10

  A  120Rh IT decay (0.294 μs) 

General Comments:

2006Mo07: 120Rh produced and identified in 9Be(136Xe,X)

reaction at E136Xe=121.8 MeV/nucleon. The A1900 fragment separator at NSCL facility at MSU 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 decay events were time stamped and correlated. Measured half-life from β spectrum

2004Wa26 (same lab as 2006Mo07): 9Be(136Xe,X), E136Xe=120 MeV/nucleon; A1900 fragment separator at NSCL facility. Measured Eγ, β, T1/2, (fragment)(β) correlations

Others (tentative evidence for the formation of 120Rh):

1998Do08: 208Pb(238U,X) E=750 MeV/nucleon. Fragment recoil separator (FRS) at GSI facility. Fragments separated by magnetic rigidity, mass and total kinetic energy distribution. Measured (fragment)(β and/or γ) coincidence. Tentative evidence for the formation of 120Rh with a measured fractional yield of 0.007 3.

1994Be24 (from the same lab as 1998Do08): same reaction as in 1998Do08, measured σ=5 μb with 13 counts assigned to 120Rh

2007To23 (also 2006ToZW thesis): in a short report authors report observation of isomers in several nuclei including 120Rh from fragmentation of 136Xe beam at 120 MeV/nucleon carried out at β counting setup of NSCL, MSU facility. α γ ray of 211 keV was shown in a spectrum from the isomer decay with neither its half-life nor its placement in a level scheme.

2015Lo04: 120Rh 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 120Rh 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 120Rh 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 (2017Wa10): 200 for Q(β-) and S(n), 360 for S(p) and Q(α).

Q-value: S(2n)=10070 200, S(2p)=29600 450, Q(β-n)=4520 200 (syst,2017Wa10)

XREF T1/2(level)E(γ)
I(γ)M(γ)Final Levels
    0A 132 ms 5 
% β- = 100
% β-2n = ?
% β-n < 5.4
   98.1 5 ?A     98.1 5 


  157.2 7 A 0.294 µs +16-15 
% IT = 100
  59.1 5 

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Additional Level Data and Comments:

    0 132 ms 5 
% β- = 100
% β-2n = ?
% β-n < 5.4
Theoretical T1/2=180 ms, %β-n=1.3, %β-2n=0.2 (2016Ma12).
  157.2 0.294 µs +16-15 
% IT = 100
Number of implanted fragments=1.7×105.

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Additional Gamma Comments:

   98.1   98.1E(γ): Reverse ordering of the 59.1-98.1 γ cascade is also possible
  157.2   59.1E(γ): Reverse ordering of the 59.1-98.1 γ cascade is also possible
M(γ): from IT decay, based on intensity balance argument

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