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 SY | S(n)= 4960 keV SY | S(p)= 17550 keV SY | Q(α)= -9930 keV SY | ||
Reference: 2017WA10 |
References: | |||
A | 1H(99Rb,2pγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | Final Levels | |
0.0 | A | 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.
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 0+ | 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). |
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