ADOPTED LEVELS for 61V
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 25-Mar-2019
Authors: Kazimierz Zuber, Balraj Singh | Citation: Nucl. Data Sheets 125, 1 (2015) | Cutoff date: 25-Jan-2015
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=1199×101 keV 89 | S(n)= 534×101 keV 92 | S(p)= 15470 keV SY | Q(α)= -1194×101 keV 158 | ||
| Reference: 2017Wa10 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0 | (3/2-,5/2-) | 48.3 ms 10 % β- = 100 % β-2n = ? % β-n > 10 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (3/2-,5/2-) | 48.3 ms 10 % β- = 100 % β-2n = ? % β-n > 10 | %β-n>10 (2014Su07) from observation and absolute intensity of 644-keV transition in 60Cr. Other %β-n|>6 (2003So02). E(level): %β-n>10 (2014Su07) from observation and absolute intensity of 644-keV transition in 60Cr. Other %β-n|>6 (2003So02). |
1992We04: first identification of 61V in fragmentation of a 500 MeV/nucleon 86Kr beam incident on a Be target and identified by a zero-degree magnetic spectrometer and separated by FRS at GSI facility. Determined production cross section.
1999So20 (also 2001So07 and 1999Le67): 61V produced in the fragmentation of 60.4 MeV/nucleon 86Kr beam with 58Ni target; LISE3 spectrometer at GANIL facility. Measured half-life of decay of 61V
2003So02: 61V produced in fragmentation of 76Ge30+ beam on 58Ni target. LISE3 achromatic spectrometer used to separate fragments; measured half-life of 61V decay and probability of delayed-neutron decay from the observation of 2+ to 0+ transition in 60Cr.
2011Da08 (also 2002MaZN thesis): 61Ti 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 methods. Measured half-life.
2014Su07: 61V beam produced from fragmentation of 120 MeV/nucleon 76Ge beam on 9Be target, followed by mass separation by A1900 separator at NSCL-MSU accelerator facility. The resulting cocktail ion beam was transported to the Beta Counting System and implanted into a 1-mm-thick double-sided silicon strip detector. Measured Eγ, Iγ, γγ-coin using SeGA array. Deduced levels J, π, estimate of %β-n Comparisons made with shell-model calculations
No information about the decay of 61Ti to 61V is available.
α very weak γ ray at 126 2 reported by 2002MaZN was seen in coincidence with heavy ions. This may either be an isomeric transition in 61Ti or a γ ray in 61V emitted by the decay of 61Ti. But a 127 2 γ has also been reported by 2005Ga01 in the decay of 61V to 61Cr.
Mass measurement by time-of-flight method: 2011Es06
Theoretical calculations: 1995Ri05 Shell model calculations (predicted spin, binding energy, mass defect).
Theory references: consult the NSR database (www.nndc.bnl.gov/nsr/) for three references for structure calculations.
Q-value: Q(β-)=11987 890 from mass excess (61V)=-30510 890 (2017Wa10) and measured mass excess (61Cr)=-42496.5 18 (2018Mo14). 2017Wa10 give mass excess (61Cr)=-42480 100
Q-value: Estimated uncertainty=940 for S(p) (2017Wa10)
Q-value: S(2n)=8820 910, S(2p)=34780 980 (syst) (2017Wa10). Q(β-n)=8330 890 and Q(β-2n)=1460 890 deduced by evaluator from mass excess for 61V in 2017Wa10, and mass excesses for 60Cr and 59Cr from measurement by 2018Mo14