The Energy and the Angular Distributions of the O¹⁶(γ, p)N¹⁵ Reaction

Abstract

The dipole states of O¹⁶ nucleus are well explained with the theory of the shell model which includes the interaction between one-particle and one-hole. For the valuation of the single-particle excitation model it is important to investigate the decays of the dipole states of O¹⁶ to excited states of a residual N¹⁵ nucleus.
An O¹⁶(γ, p)N¹⁵ reaction experiment was investigated with nuclear emulsions. O₂ natural gas target was irradiated with bremsstrahlung of 23 and 27 MeV maximum energies from a 31 MeV betatron. The energy distributions were obtained.
Almost of the 22.2 MeV state did not decay to the positive parity doublet of N¹⁵ at 5.3 MeV and more than the 90% of the 24.6 MeV state decayed to the ground state and the third excited state. The results of the present work well agreed with some other experiments.