ADOPTED LEVELS, GAMMAS for 74Ni

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 31-MAR-2017 

Authors: Balraj Singh, Ameenah R. Farhan |  Citation: Nucl. Data Sheets 107, 1923 (2006) |  Cutoff date: 30-Apr-2006 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=7550 keV SYS(n)= 6420 keV SYS(p)= 18330 keV SYQ(α)= -14370 keV SY
Reference: 2017WA10

References:
  A  74Co β- decay (31.3 MS)  B  1H(74Ni,p’γ)
  C  Coulomb Excitation 

General Comments:

74Ni identified by 1987Ar21 and 1990Be13 in 235U(n,F) reaction at E=thermal reaction. 1998Am04 used 9Be(86Kr,X) at 500 MeV/nucleon to produce 74Ni and measured half-life. 1998Fr15 (also 2002Kr13, 2001Fr21, 2000Mu10, 1998FrZY): 238U(p,F) at 30 MeV to measure half-life and yield of 74Ni.

2014Xu07: 74Ni nuclide produced in 9Be(238U,F) reaction with a 238U86+ beam of 345 MeV/nucleon produced by the RIKEN accelerator complex. Identification of 74Ni nuclei was made on the basis of magnetic rigidity, time-of-flight and energy loss of the fragments (ΔE-Bρ-tof method) using BigRIPS fragment separator and ZeroDegree Spectrometer (ZDS) at RIBF-RIKEN facility. Based on α/Q spectrum and Z versus α/Q plot. Measured heavy fragment, β and γ spectra using wide-range active silicon strip stopper array (WAS3ABi) for β and ion detection, and EUROBALL-RIKEN Cluster array for γ detection. Decay curves were obtained from time differences between implantation and correlated β decays

2011Es06: mass measurements using time-of-flight at NSCL-MSU, mass excess for 74Ni=-49210 keV 990

1999Le68 searched for microsecond isomers in 74Ni using Ni(86Kr,X) reaction at E=60.3 MeV/nucleon, but proved negative; no isomers were found between 50 ns to 100 μs.

Nuclear structure (Theory): 2014Ts02, 2012Sr03, 2006An27: levels, Jπ, B(E2)

Q-value: Estimated ΔQ(β-)=ΔS(n)=200, ΔS(p)=ΔQ(α)=450 (2017Wa10)

Q-value: S(2n)=10370 200, S(2p)=34600 540, Q(β-n)=2460 200 (syst,2017Wa10)










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0ABC 0+ 507.7 ms 46 
% β- = 100
% β-n = ?
     
  1024 1 ABC 2+ 3.9 ps +21-10    1024 1 
  100
[E2]
     0
0+
  1763 1 ?AB  (4+)      739 1 ?
  100

  1024
2+

Back to top

Back to top

Additional Gamma Data:











E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityAdditional Data
  1024 2+ 3.9 ps +21-10    1024 1 [E2]B(E2)(W.u.)=6.9 25

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     00+ 507.7 ms 46 
% β- = 100
% β-n = ?
Theoretical T1/2=1.2 s, %β-n=2.3 (2003Mo09).
E(level): Theoretical T1/2=1.2 s, %β-n=2.3 (2003Mo09).

Back to top

Additional Gamma Comments:

E(level)E(gamma)Comments
  1763   739E(γ): from β- decay. Other: 786 30 in 1H(74Ni,p’γ)

Back to top