ADOPTED LEVELS for 55Cu
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 30-Apr-2022
Author: Huo Junde | Citation: Nucl. Data Sheets 109, 787 (2008) | Cutoff date: 30-Apr-2007
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-17370 keV SY | S(n)= 18470 keV SY | S(p)= -35×101 keV 16 | Q(α)= -672×101 keV 16 | ||
| Reference: 2021WA16 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0 | (3/2-) | 55.9 ms 18 % ε = 100 % εp = ? |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (3/2-) | 55.9 ms 18 % ε = 100 % εp = ? | S(p)(55Ni)=4615 keV, thus no delayed protons can be emitted from the IAS doublet identified at 4579+4599. 2013Tr09 state that no protons were detected indicating that delayed proton branch is small. 2007Do17 reported a β+-delayed proton branch of 15.0% 43, which appears questionable in view of non-confirmation by 2013Tr09. E(level): S(p)(55Ni)=4615 keV, thus no delayed protons can be emitted from the IAS doublet identified at 4579+4599. 2013Tr09 state that no protons were detected indicating that delayed proton branch is small. 2007Do17 reported a β+-delayed proton branch of 15.0% 43, which appears questionable in view of non-confirmation by 2013Tr09. |
1987Po04: 55Cu produced and identified in Ni(58Ni,X), E=55 MeV/nucleon, followed by mass separation via tof and ΔE-E method using LISE separator at GANIL, with a total of 75 events assigned to 55Cu in their mass spectral Fig. 2.
2007Bl09: 55Cu produced in Ni(70Ge,X),E=71.6 MeV/nucleon using LISE-3 separator at GANIL. Measured production cross-sections of ≈80 pb for 55Cu, and compared with theoretical values.
2007Do17: 55Cu produced and identified in fragmentation of 74.5 MeV/nucleon 58Ni26+ beam with nickel target using SISSE/LISE3 separator facility in GANIL. Fragment 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. The γ rays were detected by four Ge detectors. Coincidences measured between charged particles and γ rays. T1/2 measured by time correlation of implantation events due to 55Cu and subsequent emission of protons and γ rays. Total proton branching ratio is from time spectrum of events with energy >900 keV in the charged-particle spectrum.
2013Tr09: 55Cu produced in 9Be(58Ni28+,p2n), E(58Ni)=160 MeV/nucleon particle-transfer reaction followed by separation using A1900 fragment separator and NSCL Radio Frequency Fragment separation at NSCL, MSU facility. Dominant fragments were 54Ni and 55Cu. The known decay characteristics of 54Ni served as calibration of data for 55Cu decay. The fragments were stopped in a planar Ge double-sided strip detectors (GeDSSD) surrounded by SeGA array of two rings of eight Ge detectors each on either side. Measured Eγ, Iγ, (implants)β-correlated events, βγ-, γγ- and βγγ-coin, half-life of 55Cu g.s. Deduced levels, J, π, IAS doublet, β feedings, log ft values, isospin mixing. Discovered split isobaric analog state (IAS) in 55Ni
Mass measurement: 2013Ya03
2021Ru09: shell-model calculations of level scheme of 55Cu using KB3G56-ISB interaction, and following population of levels in {55Cu via one-proton and one-neutron removals from a radioactive beams of 56Zn and 56Cu, respectively.
Theoretical calculations: eight primary references (six for structure and two for 55Cu decay) retrieved from the NSR database at www.nndc.bnl.gov/nsr/. These are listed in this dataset under ’document’ records.
Q-value: Estimated uncertainties (2021Wa16): 430 for Q(β- and S(n).
Q-value: Q(ε)=13700 160, Q(εp)=9090 160, S(2n)=34640 520 (syst), S(2p)=3550 160 (2021Wa16)