Authors: Balraj Singh and Jun Chen |  Citation: Nucl. Data Sheets 172, 1 (2021) |  Cutoff date: 31-Jan-2021 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=11200 keV SYS(n)= 4360 keV SYS(p)= 18730 keV CAQ(α)= -11610 keV CA
Reference: 2017Wa10,2019MO01

  A  1H(101Rb,2pγ) 

General Comments:

1997Be70: 100Kr produced and identified in 9Be(238U,X) reaction at E=750 MeV/nucleon followed by mass separation. α total of three counts were assigned to 100Kr with corresponding cross section of 0.5 nb, time-of-flight method for isotopic identification

2011Ni01: 100Kr nuclide produced in Be(238U,F) reactions at E=345 MeV/nucleon produced by the cascade operation of the RIBF complex of accelerators at RIKEN. Target=550 mg/cm2. Identification of 100Kr 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 100Kr 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 ( for 20 primary references, 16 dealing with nuclear structure calculations and four with decay modes and half-lives.

Experimental data for the first (2+) state are available only from 1H(101Rb,2pγ) (2017Fl03)

Q-value: Estimated uncertainties (2017Wa10): 400 for Q(β-), 570 for S(n)

Q-value: Q(β-) and S(n) from 2017Wa10. S(p) and Q(α) are theoretical values from 2019Mo01

Q-value: S(2n)=6880 500, Q(β-n)=8000 400 (syst,2017Wa10). Q(β-2n)=3170 400 (deduced by evaluators from masses in 2017Wa10). S(2p)=34990 (2019Mo01, theory).

XREFJπ(level) T1/2(level)E(γ)
    0A 0+ 7 ms +11-3 
% β- = 100
% β-n = ?
% β-2n = ?
  309 10 A (2+)     309 10 

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Additional Level Data and Comments:

    00+ 7 ms +11-3 
% β- = 100
% β-n = ?
% β-2n = ?
Theoretical T1/2=37.9 ms, %β-n=30, %β-2n=0.0 (2019Mo01).
E(level): Theoretical T1/2=37.9 ms, %β-n=30, %β-2n=0.0 (2019Mo01).

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