ADOPTED LEVELS, GAMMAS for 64V
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-)=17320 keV SY | S(n)= 2650 keV SY | S(p)= 17750 keV SY | Q(α)= -14190 keV SY | ||
| Reference: 2021WA16 |
| References: | |||
| A | 9Be(76Ge,xγ) | B | 9Be(238U,Fγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) |
| 0 | AB | (0,1,2) | 15 ms 2 % β- = 100 % β-n = ? % β-2n = ? % B-3N = ? | |||
| 81.9 4 | AB | 571 ns 58 % IT = 100 | 81.9 4 | 100 | [E2] |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 81.9 | 571 ns 58 % IT = 100 | 81.9 4 | [E2] | 0.820 | B(E2)(W.u.)=9.7 11 (<a href= "http://www.nndc.bnl.gov/nsr/nsrlink.jsp?2021Wi05 ">2021Wi05</a>), α=0.820 17 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (0,1,2) | 15 ms 2 % β- = 100 % β-n = ? % β-2n = ? % B-3N = ? | In the study of 64V decay to 64Cr, 2014Su11 did not observe any γ ray which could be assigned to 63Mn, β-n daughter of 64V, from which %β-n could be assigned ≈0. However, there could be β-n decay of 64V to the ground state of 63Mn. E(level): In the study of 64V decay to 64Cr, 2014Su11 did not observe any γ ray which could be assigned to 63Mn, β-n daughter of 64V, from which %β-n could be assigned ≈0. However, there could be β-n decay of 64V to the ground state of 63Mn. |
| E(level) | E(gamma) | Comments |
| 81.9 | 81.9 | E(γ): weighted average of 81.0 7 from (76Ge,Xγ) (2014Su11) and 82.0 3 from (238U,Fγ) (2021Wi05) M(γ): E2 multipolarity is assigned by 2021Wi05, based on Weisskopf estimates for transition probabilities of various multipolarities. Authors mention that M1 admixture is not ruled out. But it is not clear how E1 or E1 with small M2 admixture is ruled out |
1997Be70: 64V produced by 9Be(238U,F), E=750 MeV/nucleon, fragments separator (FRS), identification by time-of-flight. α total of two counts was observed with cross section of 0.3 nb
2011Da08 (also 2002MaZN thesis): 64V 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.
2014Su11: 64V produced at the NSCL-MSU facility by the fragmentation of a 76Ge beam, E=130 MeV/nucleon, impinging on 9Be target. Products were selected by the A1900 fragment separator and identified by time of flight and energy loss information, then delivered to β counting system (BCS) surrounded by SeGA Ge array for γ-ray detection. The 64V ions were finally stopped in 1 mm thick DSSD which detected β particles. Measured Eγ, (64V)γ coincidence, βγ correlated spectra. Deduced levels, half-life, an isomer in 64V
Theoretical structure calculations: two primary references in the NSR database at www.nndc.bnl.gov
Q-value: Estimated uncertainties: ΔQ(β-)=500, ΔS(n)=530, ΔS(p)=640, ΔQ(α)=640 (2021Wa16)
Q-value: Q(β-n)=11790 410, S(2n)=7250 480, S(2p)=38210 720 (syst,2021Wa16)
Q-value: Q(β-2n)=8390 400 (syst) and Q(β-3n)=1960 400 (syst), deduced by evaluators from evaluated mass excesses of 64V, 62Cr and 61Cr in 2021Wa16.