(p, n) Cross Sections at 6.75 MeV

The ($p, n$) partial reaction cross sections at 6.75 MeV have been measured for the isotopes ${\mathrm{Sc}}^{45}$, ${\mathrm{V}}^{51}$, ${\mathrm{Mn}}^{55}$, ${\mathrm{Cu}}^{63}$, ${\mathrm{Cu}}^{65}$, ${\mathrm{Ga}}^{69}$, ${\mathrm{Ga}}^{71}$, and ${\mathrm{Br}}^{79}$. The results of the measurements in millibarns are 179±9, 480±31, 440±40, 239±13, 566±37, 981±98, 649±69, and 86±5, respectively. The purpose of the experiment is to provide information on reaction cross sections for comparison with optical-model computations. A preliminary comparison of the variation of the cross sections with mass number is made with the partial wave penetrabilities computed from an optical-model potential.