@article{4843a4abdcf94b3ebd484a7d9335fb39,

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

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 σα/σd, where σdis the deuteron photodisintegration cross section, shows a step-like rise to a value of 6 at Eγ∼ 140 MeV.",

keywords = "He, Photodisintegration, Photon absorption, Step-like rise, pn pair, Δ resonance",

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

note = "Funding Information: We would like to express our sincere thanks to Prof. S. Yamada and Prof. H. Okuno for their encouragement of this work. We appreciate Dr. G. Garino for his critical comments to the manuscript. Thanks are due to the ES crew for their support in carrying out the experiment. Part of this work is financially supported by the Grant-in-Aid for Special Project Research on Meson Science of the Ministry of Education, Science, Sports and Culture of Japan.",

year = "1997",

month = feb,

day = "13",

doi = "10.1016/S0370-2693(96)01658-9",

language = "English",

volume = "393",

pages = "295--300",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "3-4",

}