Photoemission of protons from 4He in theΔ-resonance region

Wichmann, R. et al. (1996) Photoemission of protons from 4He in theΔ-resonance region. Zeitschrift für Physik A: Hadrons and Nuclei, 355(1), pp. 169-177. (doi: 10.1007/BF02769681)

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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 atΘ p lab=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.

Item Type:Articles
Glasgow Author(s) Enlighten ID:MacGregor, Professor Douglas and Seitz, Dr Bjoern
Authors: Wichmann, R., Ahrens, J., Arends, H.J., Beck, R., Galler, G., Hünger, A., Kraus, A., MacGregor, I.J.D., Peise, J., Seitz, B., Schmitz, M., Schneider, M., Selke, O., Schumacher, M., and Wissmann, F.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Zeitschrift für Physik A: Hadrons and Nuclei
ISSN (Online):1431-5831

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