The ($e$,$p$) and ($e$,$\alpha$) cross sections for ${}_{}{}^{56}{}_{}{}^{}\mathrm{Fe}$, ${}_{}{}^{59}{}_{}{}^{}\mathrm{Co}$, and ${}_{}{}^{64}{}_{}{}^{}\mathrm{Zn}$ have been measured in the electron energy range 16-100 MeV. They have been analyzed using the distorted-wave Born approximation $E1$ and $E2$ virtual photon spectra. The $E1$ and $E2$ components in the proton and $\alpha$ channels have been obtained.

NUCLEAR REACTIONS ${}_{}{}^{56}{}_{}{}^{}\mathrm{Fe}$($e$,$p$), ${}_{}{}^{56}{}_{}{}^{}\mathrm{Fe}$($e$,$\alpha$), ${}_{}{}^{59}{}_{}{}^{}\mathrm{Co}$($e$,$p$), ${}_{}{}^{59}{}_{}{}^{}\mathrm{Co}$($e$,$\alpha$), ${}_{}{}^{64}{}_{}{}^{}\mathrm{Zn}$($e$,$p$), and ${}_{}{}^{64}{}_{}{}^{}\mathrm{Zn}$($e$,$\alpha$); measured $\sigma (E_0,E_x,34\mathrm{}°)$, $\sigma (E_0,E_x,48\mathrm{}°)$, $\sigma (E_0,E_x,62\mathrm{}°)$, $\sigma (E_0,E_x,90\mathrm{}°)$, $\sigma (E_0,E_x,118\mathrm{}°)$, $\sigma (E_0,E_x,132\mathrm{}°)$; obtained $\sigma \mathrm{}(e,p)\mathrm{}$, $\sigma (e,\alpha )$; deduced ${\sigma }_{\gamma ,p}^{E1}\mathrm{}\left(E\right)\mathrm{}$, ${\sigma }_{\gamma ,p}^{E2}\mathrm{}\left(E\right)\mathrm{}$, ${\sigma }_{\gamma ,\alpha }^{E1}\mathrm{}\left(E\right)\mathrm{}$, ${\sigma }_{\gamma ,\alpha }^{E2\mathrm{}}\mathrm{}\left(E\right)\mathrm{}$.

• Received 21 May 1981

DOI:https://doi.org/10.1103/PhysRevC.24.1952