ADOPTED LEVELS for 64As
Authors: Balraj Singh and Jun Chen | Citation: Nucl. Data Sheets 178, 41 (2021). | Cutoff date: 12-Nov-2021
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-12670 keV SY | S(n)= 14100 keV SY | S(p)= -100 keV SY | Q(α)= -2370 keV SY | ||
| Reference: 2021WA16 |
| E(level) (keV) | T1/2(level) |
| 0 | 69.0 ms 14 % ε = 100 % εp = ? |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 69.0 ms 14 % ε = 100 % εp = ? | 64Se is most likely stable towards proton decay, as S(p) is only marginally negative, and a large number of events are assigned to this isotope in α/Q Fig. 1 of 2016Bl05. As only the β+ decay has been observed, %ε+%β+=100 is assigned by inference. E(level): 64Se is most likely stable towards proton decay, as S(p) is only marginally negative, and a large number of events are assigned to this isotope in α/Q Fig. 1 of 2016Bl05. As only the β+ decay has been observed, %ε+%β+=100 is assigned by inference. |
1995Bl06: 64As produced and identified in Ni(78Kr,X), E=73 MeV/nucleon at GANIL using LISE3 separator and time-of-flight.
2002Bl17, 2002Lo13: later work by the same group as 1995Bl06, measured half-life, but the statistics were low.
2007Bl09: 64As produced in Ni(70Ge,X),E=71.6 MeV/nucleon at GANIL using LISE3 separator. Measured production σ
2014Ro14: 64As isotope produced in the fragmentation of 70 MeV/nucleon 78Kr beam with Ni target. Fragments selected with the LISE3 separator at GANIL and identified by time-of-flight and energy loss. Measured half-life of 64As ground-state decay by (fragment)β, (fragment)γ correlations using set of four Si detectors (an energy loss ΔE detector, a degrader, DSSD and Si(Li)) for particles surrounded by four HPGe Clover detectors, three EXOGAM and one mini-clover Ge detector for γ rays.
2017GoZT (thesis): 64As produced in 9Be(78Kr,X), E(78Kr)=345 MeV/nucleon reaction, followed by separation of fragments using BigRIPS and Zero Degree Spectrometers at RIBF-RIKEN. Measured half-life of the decay of 64As.
Theory references: consult the NSR database at www.nndc.bnl.gov for six primary references dealing with nuclear structure calculations
Q-value: Estimated uncertainties: ΔQ(β-)=540, ΔS(n)=290, ΔS(p)=200, ΔQ(α)=290 (2021Wa16)
Q-value: Q(ε)=14780 200, Q(εp)=9730 200, S(2n)=31260 360, S(2p)=2120 200 (syst,2021Wa16)