1. Measurement of the recoil protons in the reaction of γ + p → p + anything for the energy range from 710 to 950 MeV
- Author
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Hideki Okuno, Hirotsugu Fujii, Eiichi Ohshima, Nobuyuki Yamashita, Akifumi Itano, Takanobu Ishii, A. Sasaki, Yoshimoto Hoshi, S. Homma, I. Arai, Koichi Maruyama, and Harukuni Ikeda
- Subjects
Momentum ,Physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,Recoil ,Photon ,Phase space ,Isospin ,Intermediate state ,Atomic physics ,Nuclear Experiment ,Excitation - Abstract
The momentum spectrum of the recoil protons in the reaction γ + p → p + anything is measured in the incident energy range from 710 MeV to 950 MeV. A tagged photon beam is used as an incident photon. From this measurement the cross sections of the reactions, γ + p → p + π+ + π− and γ + p → p + π0 + π0, are obtained as functions of the energy of the incident photon. The observed ratio of these two reactions ( p + π 0 + π 0 ) ( p + π + + π − ) is about 0.2 in the incident energy region investigated, and is consistent with the excitation of the isospin - 1 2 intermediate state in the s-channel. No serious deviations from the phase space are observed in the missing-mass spectrum of protons.
- Published
- 1979