Abstract

Momentum spectra of protons from the ($\ensuremath{\gamma}$, $p$) reaction have been measured at ${\ensuremath{\theta}}_{p}=30\ifmmode^\circ\else\textdegree\fi{}$ for $^{1}\mathrm{H}$, $^{2}\mathrm{H}$, $^{4}\mathrm{He}$, $^{9}\mathrm{Be}$, $^{12}\mathrm{C}$, and $^{16}\mathrm{O}$ with a tagged photon beam with energies from 187 to 427 MeV. By analysis of these inclusive proton spectra, cross sections for the pion photoproduction from the quasifree nucleon in the target nucleus and those for the photodisintegration of the quasifree two-nucleon system have been obtained as a function of the photon energy and of the target mass number.

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