ADOPTED LEVELS, GAMMAS for 98Kr

Authors: Jun Chen, Balraj Singh |  Citation: Nucl. Data Sheets 164, 1 (2020) |  Cutoff date: 15-Feb-2020 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=10060 keV SYS(n)= 4960 keV SYS(p)= 17550 keV SYQ(α)= -9930 keV SY
Reference: 2017WA10

References:
  A  1H(99Rb,2pγ) 

General Comments:

1997Be70 (also 1997Be12): 98Kr identified by analyzing fragments by Fragment Separator at GSI using tof (of 300 ns) method on fission fragments in Pb(238U,X) and Be(238U,X) reactions at E(238U)=750 MeV/nucleon. α total of 525 events were assigned to 98Kr

2003Be05: 98Kr produced at PSB-ISOLDE facility in CERN by 1.0 GeV- or 1.4-GeV protons impinging on a uranium-carbide/graphite target. Measured β and neutrons; deduced T1/2 and %β-n.

2011Ni01: 98Kr nuclide produced in Be(238U,F) reactions at E=345 MeV/nucleon produced by the cascade operation of the RBIF complex of accelerators at RIKEN. Target=550 mg/cm2. Identification of 98Kr made on the basis of magnetic rigidity, time-of-flight and energy loss. The separated nuclei were implanted in a nine-layer double-sided silicon-strip detector (DSSSD). Correlations were recorded between the heavy ions and β rays. The half-life of 98Kr isotope was measured from the correlated ion-β decay curves and maximum likelihood analysis technique. In the analysis of the decay curve, β-detection efficiency, background rate, daughter and granddaughter (including those populated in delayed neutron decays) half-lives, and β-delayed neutron emission probabilities were considered. Comparison of measured half-lives with FRDM+QRPA and KTUY+GT2 calculations

Theory references: consult the NSR database (www.nndc.bnl.gov/nsr/) for 26 primary references, 18 dealing with nuclear structure calculations and 8 with decay modes and half-lives.

Q-value: Estimated uncertainties (2017Wa10): 300 for Q(β-), 330 for S(n), 500 for S(p), 580 for Q(α)

Q-value: Q(β-n)=6140 300, S(2n)=7370 300 (syst,2017Wa10). S(2p)=33110 (2019Mo01,theory). Evaluators deduce Q(β-2n)=900 300 from mass values in 2017Wa10








E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
Final Levels
    0.0A 0+ 43 ms 4 
% β- = 100
% β-2n = ?
% β-n = 7.0 10
   
  329 7 A (2+)     329 7 
    0.0
0+
  545 17 A (0+,2+)     216 10 
  329
(2+)
  638 25 ?A     638 25 ?
    0.0
0+
  827 20 A (4+)     498 13 
  329
(2+)

E(level): From Eγ values

Jπ(level): From 2017Fl03 in 1H(99Rb,2pγ), based on systematics of even-even nuclei for the first 2+ states, and comparison with theoretical calculations for all the three states.

E(γ): From 1H(99Rb,2pγ) (2017Fl03)

Back to top

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    0.00+ 43 ms 4 
% β- = 100
% β-2n = ?
% β-n = 7.0 10
Theoretical T1/2=83.8 ms, %β-n=12, %β-2n=0.0 (2019Mo01).
E(level): Theoretical T1/2=83.8 ms, %β-n=12, %β-2n=0.0 (2019Mo01).

Back to top