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Nuclear Spectroscopy of Cu 62 with Cu <mml:…

1973; American Institute of Physics; Volume: 8; Issue: 4 Linguagem: Inglês

10.1103/physrevc.8.1394

1538-4497

W. W. Daehnick, Y. S. Park, D. L. Dittmer,

Nuclear physics research studies

The level structure of $^{62}\mathrm{Cu}$ was studied by the reaction $^{63}\mathrm{Cu}(d,t)^{62}\mathrm{Cu}$ (at ${E}_{d}=16 \mathrm{and} 12$ MeV), by $^{63}\mathrm{Cu}(^{3}\mathrm{He},\ensuremath{\alpha})^{62}\mathrm{Cu}$ and $^{62}\mathrm{Ni}(^{3}\mathrm{He},t)^{62}\mathrm{Cu}$ (at ${E}_{^{3}\mathrm{He}}=18$ MeV), and by $^{64}\mathrm{Zn}(d,\ensuremath{\alpha})^{62}\mathrm{Cu}$ (at ${E}_{d}=12.08$ MeV). Experimental resolution varied between 7-9 keV (for $d,t$) and 12-15 keV (for experiments involving charge-two projectiles). Angular distributions were obtained for the ($d,t$) and ($d,\ensuremath{\alpha}$) reactions for the ${15}^{\ensuremath{\circ}}\ensuremath{\ge}{\ensuremath{\theta}}_{L}\ensuremath{\ge}{45}^{\ensuremath{\circ}}$ and ${12}^{\ensuremath{\circ}}\ensuremath{\ge}{\ensuremath{\theta}}_{L}\ensuremath{\ge}{90}^{\ensuremath{\circ}}$, respectively, and spectroscopic factors and $L$ transfers were extracted by distorted-wave Born-approximation (DWBA) analyses for about 60 states below 3 MeV excitation. About half of these levels had not been studied previously. In spite of the relatively low deuteron energy most ($d,\ensuremath{\alpha}$) angular distributions showed systematic direct-reaction structure and were well fitted by DWBA calculations without variable parameters. A number of unique ${J}^{\ensuremath{\pi}}={1}^{+}$ and ${J}^{\ensuremath{\pi}}={3}^{+}$ assignments could be made. Narrow ${J}^{\ensuremath{\pi}}$ limits are given for most other levels. No states with $J>5$ were identified in the energy region investigated.[NUCLEAR REACTIONS $^{63}\mathrm{Cu}(d,t)$, $E=12.00, 16.00$ MeV, measured $\ensuremath{\sigma}({E}_{t},\ensuremath{\theta})$, $^{62}\mathrm{Cu}$ level energies, resolution 8-keV DWBA analysis, deduced $l,S$. $^{64}\mathrm{Zn}(d,\ensuremath{\alpha})$, $E=12.08$ MeV measured $\ensuremath{\sigma}({E}_{\ensuremath{\alpha}},\ensuremath{\theta})$, resolution 12 keV. DWBA analysis, deduced $L$ transfers. $^{63}\mathrm{Cu}(^{3}\mathrm{He},\ensuremath{\alpha})$, $E=18.0$ MeV, measured $\ensuremath{\sigma}({E}_{\ensuremath{\alpha}})$, $^{62}\mathrm{Cu}$ level energies, resolution 15 keV. $^{62}\mathrm{Ni}(^{3}\mathrm{He},t)$, $E=18$ MeV, measured $\ensuremath{\sigma}({E}_{t})$, $^{62}\mathrm{Cu}$ level energies, resolution 15 keV.]