ADOPTED LEVELS for 50Ni
Authors: Jun Chen and Balraj Singh | Citation: Nucl. Data Sheets 157, 1 (2019) | Cutoff date: 15-Apr-2019
Full ENSDF file | Adopted Levels (PDF version)
| S(n)= 20390 keV SY | S(p)= 1530 keV SY | Q(α)= -7460 keV SY | |||
| Reference: 2017WA10 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0 | 0+ | 18.5 ms 12 % ε = 100 % εp = 73 6 % EC2P = 14 5 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 0+ | 18.5 ms 12 % ε = 100 % εp = 73 6 % EC2P = 14 5 | %εp=86.7 39 is total delayed proton branch in 2007Do17 from time spectrum of events with energy >900 keV in the charged-particle spectrum, out of which 14% 5 seems associated with ε2p branch, from the observed intensity of 1972 proton group in 2007Do17. Possible small contribution from delayed-α is ignored. Other %εp=70 20 (2003Ma34). E(level): %εp=86.7 39 is total delayed proton branch in 2007Do17 from time spectrum of events with energy >900 keV in the charged-particle spectrum, out of which 14% 5 seems associated with ε2p branch, from the observed intensity of 1972 proton group in 2007Do17. Possible small contribution from delayed-α is ignored. Other %εp=70 20 (2003Ma34). |
1994Bl10: first identification of 50Ni isotope. Fragmentation reaction used to produce 50Ni isotope at GSI facility. Primary beam: 58Ni at 650 MeV/nucleon; target:9Be. Fragment separator: FRS at GSI.
2003Ma34: fragmentation reaction used to produce 50Ni isotope at GSI facility. Primary beam: 58Ni at 650 MeV/nucleon; target=9Be. Fragment separator: FRS at GSI. Fragments implanted in a telescope of eight Si detectors and identified by charge and charge/mass ratio, including time-of-flight method. Measured βp spectra following fragment implantation, half-life and delayed proton branch. This work is from the same laboratory as 1994Bl10.
2007Do17: fragmentation reaction used to produce 50Ni isotope at SISSE/LISE3 facility in GANIL. Primary beam: 58Ni26+ at 74.5 MeV/nucleon; target=natural Ni. Fragment separator=α-LISE3. Identification by energy loss, residual energy and time-of-flight measurements using two micro-channel plate (MCP) detectors and Si detectors. Double-sided silicon-strip detectors (DSSSD) and a thick Si(Li) detector were used to detect implanted events, charged particles and β particles. γ rays were detected by Ge detectors. Coincidences measured between charged particles, β rays and γ rays.
Theory references: consult the NSR database (www.nndc.bnl.gov/nsr/) for 30 primary references dealing with various aspects of nuclear structure
Q-value: Estimated ΔS(n)=780, ΔS(p)=ΔQ(α)=710 (2017Wa10)
Q-value: Q(εp)=13340 500, S(2n)=37060 710, S(2p)=700 640 (syst,2017Wa10). Q(ε2p)=10598 500 (syst, deduced by evaluator from mass excesses in 2017Wa10)