Measurement of the 4He (γ, npp) n reaction in the Δ-resonance region

T. Emura, I. Endo, S. Endo, H. Itoh, S. Kato, M. Koike, K. Maeda, T. Maki, S. Maruo, K. Maruyama, Y. Murata, K. Niki, C. Rangacharyulu, A. Sasaki, T. Suda, Y. Sumi, Y. Wada, K. Yoshida

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8 Citations (Scopus)


This is the first kinematically complete measurement of the 4He(γ, npp)n reaction in the energy range of 135-455 MeV. The ordered-momentum spectra and the double-differential cross sections are compared with the calculations which assume that photons are absorbed either on two- (np or pp), three- (npp), or four-nucleon systems. The ordered-momentum spectra below 400 MeV are reproduced well by pp and/or npp absorption but not by np absorption only.

Original languageEnglish
Pages (from-to)460-464
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4
Publication statusPublished - 1991 Sept 26


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