Spectroscopy of 1f−2p Nuclei with Direct (d, α) and (d, p) Reactions. II. Cu64

Abstract

Levels of ${\mathrm{Cu}}^{64}$ were studied with 12.08-MeV deuterons via the ${\mathrm{Zn}}^{66}(d, \alpha )$ reaction with 11-12-keV resolution and the ${\mathrm{Cu}}^{63}(d, p)$ reaction with 7-8-keV resolution. About 85 levels were identified for $E_{\mathrm{ex}}\le 3$ MeV, i.e., 35 more than reported in the most recent literature. ${\mathrm{Zn}}^{66}(d, \alpha ){\mathrm{Cu}}^{64}$ angular distributions were obtained over the range $15°\le \theta \le 90°$, and $L$ values were extracted from comparison with distorted-wave Born-approximation (DWBA) calculations which incorporated finite-range and nonlocality corrections as well as microscopic form factors. Good agreement was found between the observed and calculated angular distributions. ${\mathrm{Cu}}^{63}(d, p){\mathrm{Cu}}^{64}$ angular distributions were obtained over the range $8°\le \theta \le 50°$, and $l$ values and spectroscopic factors were extracted from the comparison with DWBA calculations which included finite-range and nonlocality corrections and spin-orbit coupling for the bound neutron. It was possible to make unique $1^{+}$ and $3^{+}$ assignments for many levels from the recognition of $L=0\mathrm{}$ transfers, $L$ mixing in ($d, \alpha$) transitions, and overlap between ($d, \alpha$) and ($d, p$) $J^{\pi }$ limits. Good agreement in $J^{\pi }$ assignments was found between the present work and ($n, \gamma$) work for almost all levels below 1-MeV excitation.