ADOPTED LEVELS for 65Cr
Author: Jun Chen | Citation: Nucl. Data Sheets 202, 59 (2025) | Cutoff date: 25-Feb-2025
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=12759 keV 45 | S(n)= 2706 keV 52 | S(p)= 19280 keV SY | Q(α)= -14370 keV SY | ||
| Reference: 2021WA16 |
| E(level) (keV) | T1/2(level) |
| 0.0 | 27 ms 3 % β- = 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 27 ms 3 % β- = 100 | From measured intensities of γ rays from the β decay of 65Cr and daughter nucleus 65Mn, 2005Ga01 claim that the decay of 65Cr stays in the α=65 chain and scarcely occurs through β-delayed neutron emissions. E(level): From measured intensities of γ rays from the β decay of 65Cr and daughter nucleus 65Mn, 2005Ga01 claim that the decay of 65Cr stays in the α=65 chain and scarcely occurs through β-delayed neutron emissions. |
Mass measurements: 2022Si20 (M.E.=-28208 45), 2020Me06 (M.E.=-27280 780)
2022Si20: 65Cr was produced via U(p,X) with a 480 MeV proton beam impinged on a UCx target at the ISAC facility of TRIUMF. Fragments were separated by the ISAC dipole magnetic separator and sent to a Multiple-Reflection Time-of-Flight Mass Spectrometer (δ-tof-ms) of the TITAN facility. Measured time-of-flight, storage time. Deduced mass excess, T1/2
2020Me06: 65Cr was produced by fragmentation of a 140 MeV/nucleon 82Se beam on a Be target at NSCL. Fragments were separated by the A1900 fragment separator, analyzed with the S800 spectrograph, and stopped in the focal plane of S800, with identification using the tof-ΔE method. Deduced mass excess from the magnetic-rigidity corrected time-of-flight (tof-Bρ) mass spectrometry.
2011Da08: 65Cr was produced in the fragmentation of 57.8 MeV/nucleon 86Kr beam impinged on 50 mg/cm2 thick tantalum target at GANIL. Fragments were identified and selected using the LISE-2000 spectrometer with a three-element Si-detector telescope, and implanted into a double-sided silicon-strip detector (DSSSD) backed by a Si(Li) detector and surrounded by four clover type EXOGAM Ge detectors. Measured implant-β time correlation. Deduced 65Cr decay half-life. See also 2002MaZN thesis
2005Ga01,2003So21: 65Cr was produced by fragmentation of a 61.8 MeV/nucleon 76Ge beam on a 58Ni target at GANIL. Fragments were identified and seperated by the LISE3 spectrometer with 3 consecutive silicon detectors, and implanted into the last Si detector surrounded by 4 Ge detectors for γ detection. Measured Eβ, βγ-coin, implant-β(t). Deduced 65Cr decay T1/2.
1997Be70: 65Cr was produced by fission of uranium projectiles at relativistic energies on a beryllium target at GSI. Identification of fission fragments was done with a fragment separator (FRS) using energy-loss measurements for element identification, and time-of-flight and magnetic rigidity for mass determination. Measured production yields. See also 1995CzZZ for their first measurement and preliminary results.
1995CzZZ: Pb,Be(238U,F) E=750 MeV/nucleon at GSI. α preliminary result reveals more than 50 new neutron-rich isotopes ranging from 62V to 120Ru identified by time-of-flight using the fragment separator FRS. No detailed results are presented. This preliminary report is superseded by 1997Be70.
Theoretical calculation:
2011Gu03: calculated rms radius of p-wave valence neutron distribution.
Q-value: ΔS(p)=450, ΔQ(α)=360 (syst,2021Wa16)
Q-value: S(2n)=8147 49, Q(β-n)=6710 45, from mass excesses of 65Cr and 63Cr (-36204 18) measured by 2022Si20 and -42989 4 for 64Mn from 2021Wa16. Values from 2021Wa16: S(2n)=8270 210 (syst), Q(β-n)=6610 200 (syst)
Q-value: S(2p)=37030 540 (syst,2021Wa16)