Investigation of the Reaction He-4(gamma,pn)d at Energies below the Meson-Production Threshold

摘要

The momentum distributions of deuterons and nucleons from the reaction(4)He(gamma,pn) d induced by bremsstrahlung photons whose spectrum extends up to the endpoint energy of 150 MeV weremeasured by means of a diffusion chamber placed in a magnetic field. These measurements were performed in four photon-energy intervals for deuterons and in the energy range between 100 and 150 MeV for nucleons. Angular and energy correlations of nucleons were measured at photon energies in the interval between 50 and 70 MeV. The results obtained in this way were analyzed on the basis of the quasideuteron model. The probability for final-state nucleon-deuteron interaction was estimated.