ADOPTED LEVELS for 77Ni
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 30-SEP-2020
Authors: Balraj Singh, Ninel Nica | Citation: Nucl. Data Sheets 113, 1115 (2012) | Cutoff date: 30-Mar-2012
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=12063 keV SY | S(n)= 3240 keV SY | S(p)= 19580 keV SY | Q(α)= -16330 keV SY | ||
| Reference: 2017WA10,2017We16 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0 | (9/2+) | 158.9 ms 42 % β- = 100 % β-n = 26 16 % β-2n = ? |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (9/2+) | 158.9 ms 42 % β- = 100 % β-n = 26 16 % β-2n = ? | Theoretical T1/2=257.7 ms, %β-n=23, %β-2n=0 (2019Mo01). E(level): Theoretical T1/2=257.7 ms, %β-n=23, %β-2n=0 (2019Mo01). |
1995En07: 77Ni nucleus identified by thermal neutron fission of 235U followed by mass separation. α total of about 13 events were assigned to 77Ni.
1997Be12, 1997Be70: 77Ni observed in (238U,X) on Pb and Be targets at E(238U)=750 MeV/nucleon followed by fragment separation
2005Ho08 (also 2007Sc29,2004St28,2005Sc28): 9Be(86Kr,X) E=140 MeV/nucleon; fully-ionized 86Kr beam, A1900 fragment separator at NSCL facility. Detected β particles correlated with implanted nuclei in Si detectors. Measured yield and half-life of 77Ni
2014Xu07: 77Ni nuclide produced in 9Be(238U,F) reaction with a 238U86+ beam of 345 MeV/nucleon produced by the RIKEN accelerator complex. Identification of 77Ni 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 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. See also 2014XuZZ thesis
2017Sa32, 2016Sa07: decay of 77Ni to 77Cu studies at RIBF-RIKEN facility
Theoretical calculations: consult the NSR database at www.nndc.bnl.gov for 21 primary theory references dealing with nuclear structure calculations, and radioactive decays.
Q-value: Q(β-)=12063 500 from mass excess (77Ni)=-36800 500 (syst, 2017Wa10) and measured mass excess (77Cu)=-48862.8 12 (2017We16). S(n), S(p) and Q(α) are from 2017Wa10
Q-value: Estimated uncertainties: 500 for Q(β-) (2017Wa10, 2017We16), 640 for S(n) (2017Wa10), 780 (2017Wa10) for S(p), and 710 for Q(α) (2017Wa10)
Q-value: Q(β-n)=6110 500, S(2n)=8910 580, S(2p)=37740 780 (syst, 2017Wa10). Q(β-2n)=1529 500 deduced by evaluator from relevant mass excesses in 2017Wa10. The Q((β-n)) and Q(β-2n) values are nearly the same when measured mass excesses of 76Cu and 75Cu from 2017We16 are considered.