The total cross section for 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

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


This is the first measurement of the total cross section σ(4He (γ npp)n) in the range of 135-455 MeV. The σ, which cannot be reproduced by any model, has similar Eγ dependence to γT4He → all channels). The averaged ratio σ(4He(γ, npp)n)/ σT4 He → all channels) = (2.3 ± 0.3)% is compared with a cascade-model calculation in which quasi-free pion production followed by pion reabsorption is assumed.

Original languageEnglish
Pages (from-to)229-233
Number of pages5
JournalPhysics Letters B
Issue number3-4
Publication statusPublished - 1992 Jul 30

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'The total cross section for the <sup>4</sup>He (γ, npp)n reaction in the Δ-resonance region'. Together they form a unique fingerprint.

Cite this