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 SY | S(n)= 6420 keV SY | S(p)= 18330 keV SY | Q(α)= -14370 keV SY | ||
Reference: 2017WA10 |
References: | |||
A | 74Co β- decay (31.3 MS) | B | 1H(74Ni,p’γ) |
C | Coulomb Excitation |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0 | ABC | 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+ |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Additional Data |
1024 | 2+ | 3.9 ps +21-10 | 1024 1 | [E2] | B(E2)(W.u.)=6.9 25 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0 | 0+ | 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). |
E(level) | E(gamma) | Comments |
1763 | 739 | E(γ): from β- decay. Other: 786 30 in 1H(74Ni,p’γ) |
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)