The continuum spectra of ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ have been measured up to excitation energies of 40 MeV by means of inelastic electron scattering. Incident electron beam energies between 60 and 120 MeV were used, corresponding to a momentum transfer range of 0.3 ${\mathrm{fm}}^{-1\mathrm{}}$ to 1.1 ${\mathrm{fm}}^{-1\mathrm{}}$. Scattered electrons were observed at two angles, 92.6° and 127.7°. The radiation corrected spectra and the form factors are presented, and compared with calculations based on a zero-range approximation. In this model, the sharp rise from the $p+d$ threshold previously reported may be identified as a ${}_{}{}^2{}_{}{}^{}S\to {}_{}{}^2{}_{}{}^{}S$ Coulomb monopole transition.

NUCLEAR REACTIONS ${}_{}{}^3{}_{}{}^{}\mathrm{He}(e, e^{\prime })$, $E_x=0-40\mathrm{}$ MeV; measured $\sigma (E; \theta )$; $\theta =92.6\mathrm{}° \mathrm{and} 127.7°$. Comparison between radiation-corrected spectra and zero-range model calculations; multipole decomposition.

• Received 23 June 1975

DOI:https://doi.org/10.1103/PhysRevC.12.1118