ADOPTED LEVELS, GAMMAS for 71Ni
Authors: Balraj Singh and Jun Chen | Citation: Nucl. Data Sheets 188, 1 (2023) | Cutoff date: 17-Jan-2023
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=7304.9 keV 27 | S(n)= 4264 keV 3 | S(p)= 16170 keV 11 | Q(α)= -12123 keV 4 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 71Co β- decay (80 MS) | B | 72Co β-n decay:MIXED |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
| 0.0 | AB | (9/2+) | 2.56 s 3 % β- = 100 | ||||
| 280.8 2 | AB | (7/2+) | 280.8 2 | 100 | 0.0 | (9/2+) | |
| 498.5 6 | AB | (1/2-) | 2.3 s 3 % β- = 100 | ||||
| 812.8 5 ? | AB | (5/2+) | 812.8 5 | 100 | 0.0 | (9/2+) | |
| 1065.4 6 | AB | (5/2-) | 252.6 4 566.9 2 | 9 2 100 | 812.8 498.5 | (5/2+) (1/2-) | |
| 1272.9 7 | AB | (5/2-) | 774.4 3 | 100 | 498.5 | (1/2-) | |
E(level): From 71Co β- decay
Jπ(level): Assignments are from 2010RaZY, 2009St07 and 2004Sa59 based on shell-model predictions
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (9/2+) | 2.56 s 3 % β- = 100 | Configuration=νg9/2~#(70Ni g.s.). |
| E(level) | E(gamma) | Comments |
| 280.8 | 280.8 | E(γ): other: 280.3 5 in 72Co β-n decay (2014Ra20) |
| 812.8 | 812.8 | E(γ): Ordering of the 252-813 γ cascade is interchangeable |
| 1065.4 | 252.6 | E(γ): Ordering of the 252-813 γ cascade is interchangeable |
1990Be13, 1987Ar21: 71Ni produced in 235U(n,f) and 239Pu(n,f) E=thermal followed by mass separation at GSI facility. Measured cross section for production of 71Ni.
1997Wo06: 238U(p,f) E=65 MeV/nucleon. Laser-ion guided facility, Leuven facility. Production of 71Ni isotope.
1997Hu09: 238U(p,f) E=25 MeV. Measured yield, fission distribution
2002Kr13, 2001Fr21, 2000Mu10, 1998Fr15: 238U(p,f) E=30 MeV, Leuven facility. Measured yield, γ, β, βγ coin, isotopic half-life
2004Sa13: 71Ni produced in the fragmentation of 86Kr beam at 58 MeV/nucleon with 181Ta target at GANIL facility.
2021Pe08: 71Ni produced in 9Be(86Kr,X),E=140 MeV/nucleon fragmentation reaction, followed by separation of 71Ni ions using A1900 fragment separator, with specific mass and charge of implanted nuclei determined from the time-of-flight and energy deposit analysis at NSCL-MSU facility. Measured Eβ, Iβ, Eγ, Iγ, (implants)β-correlations, half-life of the decay of 71Ni g.s., and total absorption γ spectrum (TAGS) using SuN detector (a Summing NaI(Tl) detector). Deduced B(>) distribution. Comparison with shell-model and quasi-particle random-phase approximation (QRPA) calculations.
Mass measurements: 2007Ra27 (JYFLTRAP, Penning-trap method), 2005Gu36, 1994Se12
Level systematics: 2005Gr29, 2002Gr16
Theoretical calculations:
2022Si19: calculated levels, Jπ, pairing correlations using seniority model.
2022Si22: calculated levels, Jπ, dependence of the order of the ground state multiplet (GSM) levels and the splitting of seniority multiplet.
Q-value: S(2n)=11570 4, S(2p)=30790 200 (syst) (2021Wa16)