Photoemission of protons from4He in theΔ-resonance region

6533b855fe1ef96bd12b06e2

RESEARCH PRODUCT

Photoemission of protons from4He in theΔ-resonance region

B. Seitz A. Hünger M. Schmitz F. Wissmann R. Beck M. Schneider O. Selke Martin Schumacher J. Peise H. J. Arends I. J. D. Macgregor A. Kraus R. Wichmann J. Ahrens G. Galler

subject

Physics Nuclear and High Energy Physics Range (particle radiation)Photon 010308 nuclear & particles physics Nuclear Theory Photon energy 01 natural sciences 7. Clean energy Resonance (particle physics)Spectral line Nuclear physics Pion Photodisintegration 0103 physical sciences Atomic physics Nuclear Experiment 010306 general physics Absorption (electromagnetic radiation)

description

High resolution proton energy spectra from the4He(γ,p) reaction have been measured with tagged photons in the range Eγ = 130−525 MeV using the large Mainz NaI(T1) spectrometer atΘplab=37.1°. Three separate reaction channels were identified, viz.4He(γ,p)t two-body breakup,4He photodisintegration via two-nucleon photon absorption processes and the quasifree pion production channel. Differential cross sections are presented for each of these channels as a function of photon energy. The sum of the two-nucleon photon absorption and the quasifree pion production differential cross sections, in the CM system, resembles that of the corresponding free-nucleon differential cross section when Fermi motion is taken into account.

year	journal	country	edition	language
1996-12-01	Zeitschrift für Physik A: Hadrons and Nuclei

https://doi.org/10.1007/bf02769681

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