Elastic and Inelastic Scattering of Protons from N, Ne, Mg, Si, S and A in the Energy Range from 7.6 MeV to 14.2 MeV

The angular distributions of protons scattered elastically and inelastically by N, Ne, Mg, Si, S and A nuclei have been studied at several values of proton energy from 7.6 to 14.2 MeV. The distribution shapes for elastic scattering show generally diffraction patterns at E p >10 MeV. While the yields of inelastic scattering corresponding to the second excited state of N 14 are appreciable at higher energies, the yields for the first excited state with T =1 are markedly low. The inelastic scatterings for the first excited states of Ne 20 , Mg 24 and Si 28 are found to change their distribution shapes appreciably with proton energy. The excitation functions of the reaction for Si 28 were also studied. The results show prominent resonance features. These results seem to support that the formation of compound nucleus plays an appreciable role in the inelastic scattering from these light nuclei, especially at the lower energy. The distribution shapes of the inelastic scattering from S 32 are fairly insensitive to energy change. Further, the inelastic scattering of protons from A 40 shows quite a different feature from those mentioned above. The angular distribution shapes and their energy dependences resemble much those obtained for medium weight even-even nuclei.