ADOPTED LEVELS for 65Se
Author: Jun Chen | Citation: Nucl. Data Sheets 202, 59 (2025) | Cutoff date: 25-Feb-2025
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-16530 keV SY | S(n)= 14230 keV SY | S(p)= 780 keV SY | Q(α)= -1660 keV SY | ||
| Reference: 2021WA16 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0.0 | (3/2-) | 34.2 ms 7 % β+p = 94 +6-4 % ε = 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (3/2-) | 34.2 ms 7 % β+p = 94 +6-4 % ε = 100 | Two proton groups are observed to depopulate the IAS in 65As from the decay of 65Se: E(p0)(c.m.)=3523 16 to 64Ge g.s. with %I(p0)=44 2 and E(p1)(c.m.)=2638 15 to 901, 2+ level in 64Ge with %I(p1)=18 2, seen by 2017GoZT in coincidence with a γ of E=901.1 3 (not seen in 2011Ro47 due to low statistics). E(level): Two proton groups are observed to depopulate the IAS in 65As from the decay of 65Se: E(p0)(c.m.)=3523 16 to 64Ge g.s. with %I(p0)=44 2 and E(p1)(c.m.)=2638 15 to 901, 2+ level in 64Ge with %I(p1)=18 2, seen by 2017GoZT in coincidence with a γ of E=901.1 3 (not seen in 2011Ro47 due to low statistics). |
Mass excess=-33358 141, deduced by 2011Ro47 based on known mass excess of 65As and an estimated Coulomb Displacement Energy between 65As and 65Se: 10941 111. Other: mass excess=-33410 260 (1993Ba12)
2017GoZT (thesis; also 2020Gi02): 65Se was produced in the fragmentation of a 350 MeV/nucleon 78Kr beam at RIKEN. Fragments were identified and selected by the BigRIPS and the ZDS separators, and implanted into the WAS3ABi device consisting of 3 DSSSDs, surrounded by the EURICA array of Ge detectors for γ-ray detection. Measured E(p), I(p), implant-decay time correlations, Eγ. Deduced T1/2, branching ratios. All details are from 2017GoZT. 2020Gi02 only report the same T1/2
2011Ro47 (also 2014Ro14,2011RoZZ): 65Se was produced in the fragmentation of 78Kr on a Ni target with E(78Kr)=70 MeV/nucleon at GANIL. Fragments were selected with the α-LISE3 separator, identified by ToF and ΔE, and implanted into a detector system consisting of four silicon detectors: ΔE, degrader, DSSD, and Si(Li). γ rays were detected with four HPGe Clover detectors. Measured E(p), I(p), Eβ, Eγ, implant-β time correlation. Deduced T1/2, decay branching ratio.
1995Hu24: 65Se was produced in the 40Ca(28Si,3n) reaction at IMP, Lanzhou. Charged particles were detected with a telescope of ΔE and E detectors. Measured E(p), I(p), decay curve. Deduced T1/2, decay branching ratio, mass excess.
1993Ba12: 65Se was produced via 40Ca(28Si,3n) reaction with 175 MeV 28Si from the 88-inch cyclotron at LBNL. Charged particles were detected with a ΔE-E detector telescope. Measured E(p), I(p). Deduced decay branching ratio. Similar previous efforts by 1987Ho01 (also 1986HoZZ), 1978ViZT were unsuccessful.
Other measurement:
2005St34,2005St29: 9Be(78Kr,X) E=140 MeV/nucleon at NSCL. Measured σ
Theoretical calculations:
2022Ca20,1997Or04: calculated binding energy, S(p), S(2p)
2022Zo01,2021Ma33,2019Zo02: calculated mass excess, S(n), S(p)
2021Co08: calculated Jπ for the ground state
Q-value: ΔQ(β-)=580, ΔS(n)=580, ΔS(p)=360, ΔQ(α)=420 (syst,2021Wa16)
Q-value: S(2n)=32310 580, S(2p)=680 300, Q(ε)=13920 310, Q(εp)=14010 300 (syst,2021Wa16)