Excitation of(p32)−1and(p12)−1hole states in theO16(π+,p)O15reaction at 66 MeV

Abstract

Angular distributions have been measured at 66 MeV for the ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(${\pi }^{+},p$)${}_{}{}^{15}{}_{}{}^{}\mathrm{O}$ reaction leading to the ${\left(p_{\frac{3}{2}}\right)}^{-1\mathrm{}}$ hole state at 6.18 MeV and the ${\left(p_{\frac{1}{2}}\right)}^{-1\mathrm{}}$ hole ground state of ${}_{}{}^{15}{}_{}{}^{}\mathrm{O}$. The ratio of the two differential cross sections lies between 6 and 13 over the whole measured angular range. A comparison is made with preliminary calculations of Miller. At 45° and 105° a measurement has also been performed on the reaction ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(${\pi }^{-},p$)${}_{}{}^{15}{}_{}{}^{}\mathrm{C}$ at the same incident energy.