ADOPTED LEVELS, GAMMAS for 61Ti
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-)=14160 keV SY | S(n)= 2090 keV SY | S(p)= 19590 keV SY | Q(α)= -11900 keV SY | ||
Reference: 2017WA10 |
References: | |||
A | 9Be(238U,xγ):ISOMERS |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | A | (1/2-) | 15 ms 4 % β- = 100 % β-n = ? % β-2n = ? | |||||
125.0 5 | A | (5/2-) | 200 ns 28 % IT = 100 | 125.0 5 | 100 | [E2] | 0.0 | (1/2-) |
700.1 7 | A | (9/2+) | 354 ns 69 % IT = 100 | 575.1 5 | 100 | [M2] | 125.0 | (5/2-) |
Jπ(level): From predictions of large-scale shell-model calculations using LNPS interaction (2019Wi04). Also shell-model calculations by 1995Ri05
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
125.0 | (5/2-) | 200 ns 28 % IT = 100 | 125.0 5 | [E2] | 0.143 | B(E2)(W.u.)=5.7 8, α=0.143 3 |
700.1 | (9/2+) | 354 ns 69 % IT = 100 | 575.1 5 | [M2] | B(M2)(W.u.)=0.090 18 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | (1/2-) | 15 ms 4 % β- = 100 % β-n = ? % β-2n = ? | Theoretical T1/2=19.8 ms, %β-n=1.3, %β-2n=0.4 (2016Ma12). |
E(level) | E(gamma) | Comments |
61Sc nuclide has been identified but no information about its decay to 61Ti is available
1997Be70: 61Ti identified in projectile fission of a 750 MeV/nucleon 238U beam incident on a Be target, followed by fragment separation using FRS at GSI facility. Measured production cross section. Nine events were assigned to 61Ti with corresponding cross section of 2.5 nb.
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.
2019Wi04: two nanosecond isomers and gamma rays identified in this work from 9Be(238U,X) reaction at RIBF-RIKEN.
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. The 126γ seen by 2002MaZN is probably the same as the 125.0γ by 2019Wi04
Theoretical calculations: 1995Ri05 Shell model calculations: predicted spin, binding energy, and mass defect.
Theory references: consult the NSR database (www.nndc.bnl.gov/nsr/) for four references for structure calculations.
Q-value: Estimated uncertainties (2017Wa10): 980 for Q(β-), 500 for S(n), 640 for S(p), 570 for Q(α)
Q-value: Q(β-n)=8820 460, S(2n)=6980 450 (syst,2017Wa10). S(2p)=38160 (1997Mo25,theory). Q(β-2n)=5340 430 deduced by evaluator from mass excesses in 2017Wa10