Ca42(d,p)Ca43Reaction at 7.0- and 7.2-MeV Bombarding Energies

Abstract

The ${\mathrm{Ca}}^{42}\mathrm{}(d,p)\mathrm{}{\mathrm{Ca}}^{43}$ reaction has been studied at 7.00- and 7.20-MeV bombarding energies using the MITONR electrostatic generator in connection with the multiple-gap spectrograph. Proton spectra were observed at 23 scattering angles from 7.5 to 172.5 deg with an over-all energy resolution of 12 keV. Eighty transitions were observed up to an excitation energy of 5.0 MeV. Angular distributions showing stripping character were analyzed in the distorted-wave approximation to yield $l_n$ values and spectroscopic strengths. A sum-rule analysis indicated that all of the available $1f_{\frac{7}{2}}$, $1d_{\frac{3}{2}}$ and $2p$ strengths were observed. The beginnings of the $1g_{\frac{9}{2}}$, $1f_{\frac{5}{2}}$, and $2d_{\frac{5}{2}}$ transitions were recorded. Anomalies observed in the angular distributions to the four lowest excited states are discussed. The results are compared with other data on ${\mathrm{Ca}}^{42}$ and ${\mathrm{Ca}}^{43}$ and are discussed in terms of the shell model with residual interactions. The data suggest that neither the neutron nor the proton $1d_{\frac{3}{2}}$ shell is filled in the ${\mathrm{Ca}}^{42}$ ground state.