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 SYS(n)= 2090 keV SYS(p)= 19590 keV SYQ(α)= -11900 keV SY
Reference: 2017WA10

References:
  A  9Be(238U,xγ):ISOMERS 

General 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










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
    0.0A (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

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
  125.0 (5/2-) 200 ns 28 
% IT = 100
  125.0 5 [E2]0.143B(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

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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).

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Additional Gamma Comments:

E(level)E(gamma)Comments

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