Inelastic Proton Scattering at 40 MeV

Abstract

Inelastic proton scattering has been studied using 40-MeV protons as the projectile particle. Energy spectra of protons scattered from ${\mathrm{Li}}^7$, ${\mathrm{C}}^{12}$, ${\mathrm{Al}}^{27}$, ${\mathrm{Ca}}^{40}$, ${\mathrm{Fe}}^{54}$, ${\mathrm{Fe}}^{56}$, ${\mathrm{Ni}}^{58}$, ${\mathrm{Ni}}^{60}$, ${\mathrm{Cu}}^{63}$, ${\mathrm{Pb}}^{206}$, ${\mathrm{Pb}}^{207}$, and ${\mathrm{Pb}}^{208}$ have been taken. Angular distributions have been taken on the strongly excited states of ${\mathrm{C}}^{12}$, ${\mathrm{Mg}}^{24}$, ${\mathrm{Fe}}^{54}$, ${\mathrm{Fe}}^{56}$, ${\mathrm{Ni}}^{58}$, ${\mathrm{Ni}}^{60}$, and ${\mathrm{Pb}}^{208}$. The Blair phase rule is found to apply moderately well when a pronounced diffraction structure exists in the angular distributions. It is found that the McCarthy-Kromminga rule for the determination of parities of nuclear states from the small angle behavior of the angular distributions has limited validity. The $B\left(\mathrm{EL}\right)\text{'}\mathrm{s}$ obtained from proton inelastic scattering measurements, using a distorted-wave Born approximation analysis, agree fairly well with the values obtained by electromagnetic methods.