Measurement of the total photoabsorption cross section on a proton in the energy range 600–1500 MeV at the GRAAL

Autor: Bartalini, O., Bellini, V., Bocquet, J.P., Calvat, P., D'Angelo, A., Didelez, J.-P., DiSalvo, R., Fantini, A., Ghio, F., Girolami, B., Guidal, M., Giusa, A., Hourany, E., Ignatov, A.S., Kunne, R., M. Lapik, A., Levisandri, P., Lleres, A., Moricciani, D., N. Mushkarenkov, A., G. Nedorezov, V., Perrin, C., Rebreyend, D., Renard, F., Rudnev, N.V., Russew, T., Russo, G., Schaerf, C., Turinge, A. A.
Přispěvatelé: Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), GRAAL
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: Physics of Atomic Nuclei / Yadernaya Fizika
Physics of Atomic Nuclei / Yadernaya Fizika, MAIK Nauka/Interperiodica, 2008, 71, pp.75-82. ⟨10.1007/s11450-008-1008-9⟩
ISSN: 1063-7788
1562-692X
DOI: 10.1007/s11450-008-1008-9⟩
Popis: The total photoabsorption cross section on a free proton was measured at the GRAAL facility in the energy range Eγ = 600−1500MeV.The large-aperture LAGRANγE detector and a liquid hydrogen target were used in the experiment performed with a back-scattered Compton gamma beam. To improve the accuracy, two alternative methods were employed. First, a subtraction method of using emptytarget measurements allowed the cross section σtot to be evaluated directly because of a low level of the electromagnetic background. Second, an algorithm for evaluating σtot on the basis of summing the dominating partial cross sections was developed. Experimental results obtained for σtot by the two methods are compared with existing data.
Databáze: OpenAIRE
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