Differential cross sections $^4$He({$γ$,p})$^3$H and $^4$He({$γ$,n})$^3$He reactions in the range of the photon energies up to the threshold of the meson production    [PDF]

Yu. M. Arkatov, P. I. Vatset, V. I. Voloshchuk, V. A. Zolenko, A. F. Khodyachikh, I. M. Prokhorets, V. L. Marchenko, E. A. Vinokurov, Yu. P. Lyakhno, S. I. Nagorny, Yu. A. Kasatkin, I. K. Kirichenko, A. A. Zayats, V. N. Gur'ev
Differential cross sections two-body ($\gamma,p$) and ($\gamma,n$) reactions of the $^4$He nucleus disintegration were measured using the bremsstrahlung beam of photons at the KIPT linac LEA-300 at the maximum energy ${\rm E}_{\gamma}^{max}$ = 150 MeV. The reaction products were detected in a diffusion chamber placed in the magnetic field. The differential cross sections were measured with a 1 MeV step up to a photon energy of 45 MeV, and with a greater step at higher energies. The step in the measurements of the polar angle of nucleon emission was ${10}^{\circ}$ in the c.m.s.
View original: http://arxiv.org/abs/1304.5398