(n, d) Reaction Studies onNi58,Cu63, andZn64

Studies were made of ($n, d$) pickup reactions on ${\mathrm{Ni}}^{58}$, ${\mathrm{Cu}}^{63}$, and ${\mathrm{Zn}}^{64}$ initiated by 14-MeV neutrons. Deuteron spectra at a series of forward angles were measured using a counter telescope, and distorted-wave Born-approximation fits were made to the data. For ${\mathrm{Cu}}^{63}$, the 1.17-MeV 2+ state in ${\mathrm{Ni}}^{62}$ is excited with a cross section of 0.5 that of the ${\mathrm{Ni}}^{62}$ ground state. For ${\mathrm{Zn}}^{64}$, transitions to the ground and 0.67-MeV states of ${\mathrm{Cu}}^{63}$ involve $p$-particle pickup. Transitions to the 0.96-MeV $\frac{5}{2}$-state are not observed, indicating that the $f_{\frac{5}{2}}$ proton component in the ${\mathrm{Zn}}^{64}$ ground state is small. Strong transition strength to the 1.33-MeV $\frac{7}{2}$—level suggests that this state has a significant ${\left(f_{\frac{7}{2}}\right)}^{-1\mathrm{}}$ proton single-particle component, in addition to the core excitations included in recent calculations. In ${\mathrm{Ni}}^{58}$, excitation of the 1.37-MeV level with $S=0.6\mathrm{}$ implies a significant $2p$ proton admixture in the ${\mathrm{Ni}}^{58}$ ground state.