The reaction ($K^{+}, K^{+}p$) is considered as a probe of the deep hole states in nuclei. Distorted-wave impulse-approximation calculations are presented for the knockout of a $1s_{\frac{1}{2}}$ proton from ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$. We conclude that the experiment should be valuable.

• Received 22 August 1977

DOI:https://doi.org/10.1103/PhysRevLett.39.1319