A step-like rise in the4He(γ, pn)2H cross section near the pion-production threshold

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A kinematically complete4He(γ, pn)2H measurement was carried out in the photon energy (Eγ) range 145-425 MeV. The total cross section (σα) forms a prominent structure whose peak lies at Eγ ∼ 245 MeV (the pnd invariant mass of 3960 MeV/c2). The ratio σαd, where σdis the deuteron photodisintegration cross section, shows a step-like rise to a value of 6 at Eγ∼ 140 MeV.

Original languageEnglish
Pages (from-to)295-300
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume393
Issue number3-4
DOIs
Publication statusPublished - 1997 Feb 13

Keywords

  • He
  • Photodisintegration
  • Photon absorption
  • Step-like rise
  • pn pair
  • Δ resonance

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'A step-like rise in the<sup>4</sup>He(γ, pn)<sup>2</sup>H cross section near the pion-production threshold'. Together they form a unique fingerprint.

  • Cite this

    Maruyama, K., Niki, K., Sumi, Y., Emura, T., Endo, I., Endo, S., Itoh, H., Kato, S., Koike, M., Maeda, K., Maki, T., Murata, Y., Rangacharyulu, C., Sasaki, A., Suda, T., Wada, Y., & Yoshida, K. (1997). A step-like rise in the4He(γ, pn)2H cross section near the pion-production threshold. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 393(3-4), 295-300. https://doi.org/10.1016/S0370-2693(96)01658-9