ADOPTED LEVELS, GAMMAS for 64Cr
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-)=9.35×103 keV 30 | S(n)= 5.53×103 keV 31 | S(p)= 1.919×104 keV 45 | Q(α)= -1.397×104 keV 38 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 64V β- decay (15 MS) | B | 9Be(64Cr,64Cr’γ) |
| C | 9Be(65Mn,64CrG) | D | 9Be(66Fe,64CrG) |
| E | Coulomb Excitation | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0 | ABCDE | 0+ | 42.9 ms 10 % β- = 100 % β-n = ? | |||||
| 429 2 | ABC E | 2+ | 125 ps +49-29 | 429 2 | 100 | [E2] | 0 | 0+ |
| 1139 6 | BC | (4+) | 710 6 | 100 | 429 | 2+ | ||
| 2101 10 | C | (6+) | 962 7 | 100 | 1139 | (4+) | ||
E(level): From Eγ data
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 429 | 2+ | 125 ps +49-29 | 429 2 | [E2] | 0.00181 | B(E2)(W.u.)=20 6, α=0.00181 5 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 0+ | 42.9 ms 10 % β- = 100 % β-n = ? | Theoretical T1/2=40.7 ms, %β-n=0.6 (2016Ma12). |
| E(level) | E(gamma) | Comments |
| 429 | 429 | E(γ): weighted average of 430 2 from 64V β- decay, 420 7 from (64Cr,64Cr’γ), 423 6 from (65Mn,64Cr) |
| 1139 | 710 | E(γ): weighted average of 711 9 from (64Cr,64Cr’γ) and 710 6 from (65Mn,64Cr) |
| 2101 | 962 | E(γ): from summed γ-ray spectrum from all the three reactions. Others: 962 7 in (65Mn,64Cr) reaction, and 964 8 in (66Fe,64Cr)+(68Co,64Cr) (2021Ga02) |
1992We04: 64Cr formed in fragmentation of 86Kr beam with 9Be target and its existence determined with zero-degree magnetic spectrometer at GSI.
1999So20 (also 1999Le67): 64Cr formed in fragmentation of 86Kr beam at 60.4 MeV/nucleon with 58Ni target, β and γ spectroscopy at GANIL.
2005Ga01 (also 2003So02,2003So21): 64Cr formed by fragmentation of 76Ge beam at 61.8 MeV/nucleon with 58Ni target at GANIL. Measured half-life, β and γ rays using four Ge detectors for γ rays and a Si detector for β rays.
2005NiZZ (also 2004NiZY): 64Cr formed in fragmentation of 86Kr beam at 63 MeV/nucleon with 9Be target, measured half-life and Eβ
2011Da08 (also 2002MaZN): 64Cr produced in the fragmentation of 57.8 MeV/nucleon 86Kr beam impinged on 50 mg/cm2 thick tantalum target using LISE-2000 spectrometer at GANIL facility. Detector system included a three-element Si-detector telescope containing a double-sided silicon-strip detector (DSSSD) backed by a Si(Li) detector and surrounded by four clover type EXOGAM Ge detectors. Product identified by mass, atomic number, charge, energy loss and time of flight. Measured half-life from timing of β measurement.
2020Me06, 2016Me07: mass measurements by time-of-flight (tof) method at NSCL-MSU. Mass excess values for 64Cr are: -33640 300 in 2020Me06 and -33480 440 in 2016Me07
Theory references for structure and other topics: 32 primary references in the NSR database at www.nndc.bnl.gov
Q-value: Q(β-n)=5180 300, S(2n)=8930 300, S(2p)=36020 500 (syst) (2021Wa16)