Author: Jun Chen |  Citation: Nucl. Data Sheets 174, 1 (2021) |  Cutoff date: 15-Apr-2021 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=9.14×103 keV 79S(n)= 3.88×103 keV 79S(p)= 15840 keV SYQ(α)= -10780 keV SY
Reference: 2021WA16

General Comments:

1994Be24, 1998Do08: 123Pd produced and identified in Pb(238U,F), E=750 MeV/nucleon reaction followed by mass separation with FRS separator, and identification by time-of-flight. α total of 12 events assigned by 1994Be24 to 123Pd with σ=4 μb

2006Mo07: 123Pd produced in 9Be(136Xe,X),E=121.8 MeV/nucleon reaction using A1900 fragment separator at NSCL-MSU facility to separate nuclei of interest. The secondary beam was implanted into β-decay detection apparatus 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. Authors claim that new nuclide was identified, but it was already reported in 1994Be24 and 1998Do08. First measurement of half-life of 123Pd decay reported by 2006Mo07 from ion-β correlated spectrum from 293 implants of 123Pd nuclei

2014SmZZ: neutron-rich nuclei were produced by fission reactions of E≈900 MeV/nucleon 238U beam from the UNILAC linear accelerator and the SIS-18 synchrotron accelerated in two states impinging a 2.5 g/cm2 lead target at GSI. Fragments were separated by the FRagment Separator (FRS) and implanted into the Silicon IMplantation Beta Absorber (SIMBA) with β-delayed neutrons detected by the surrounding Beta-delayed neutron (BELEN) detector. Measured implant-β correlations, β-neutron correlations. Deduced T1/2, β-delayed neutron emission probabilities. Comparisons with available data and theoretical calculations. Discussed relevance to astrophysical r-process.

2015Lo04: 123Pd 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 123Pd 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 123Pd 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

2016Kn03: neutron-rich exotic nuclei were produced by abrasion-fission reactions of E=410-415 MeV/nucleon 238U beams from the synchrotron SIS-18 at GSI focused on a 1 g/cm2 Be target. Fission fragments were separated using the FRagment Separator (FRS) and injected into the isochronous Experimental Storage Ring (ESR). Measured masses with the Isochronous Mass Spectrometry (IMS) method. Deduced mass excesses. Comparisons with theoretical models.

2021Ha19: 123Pd ions were produced by in-flight fission of E=345 MeV primary beam of 238U on a 9Be target. Fission products were analyzed and identified by the BigRIPS seperator and the ZeroDegree spectrometer, and implanted into the Advanced Implantation detector Array (AIDA) consisting of six 128x128 strips, 1-mm thick DSSDs. Neutrons were detected with the BRIKEN neutron counter array consisting of 140 3He proportional counters. Measured β-delayed neutrons, βn(t). Deduced T1/2, β-delayed neutron emission probabilities.

Structure calculations: 2019Mo01, 2018Ut01, 2017Ko24, 2016Ma12, 2015Sa14, 2013Fa08, 2003Bo06, 2003Mo09, 1997Bo24

Q-value: ΔS(p)=850, ΔQ(α)=850 (syst,2021Wa16)

Q-value: S(2n)=10390 790, S(2p)=30390 890 (syst), Q(β-n)=2610 790 (2021Wa16)

    0 109 ms 2 
% β- = 100
% β-n = 1.4 3
  0+X? % β- = 100

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Additional Level Data and Comments:

    0 109 ms 2 
% β- = 100
% β-n = 1.4 3
Theoretical T1/2=392.8 ms, %β-n=1 (2019Mo01); T1/2=172 ms, %β-n=0.5 (2016Ma12).

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