The total photoabsorption cross section on a free proton was measured at the GRAAL facility in the energy range E-gamma = 600-1500 MeV. The large-aperture LAGRAN gamma E 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 empty-target measurements allowed the cross section sigma(tot) to be evaluated directly because of a low level of the electromagnetic background. Second, an algorithm for evaluating sigma(tot) on the basis of summing the dominating partial cross sections was developed. Experimental results obtained for sigma(tot) by the two methods are compared with existing data.

Bartalini, O., Bellini, V., Bocquet, J., Calvat, P., D'Angelo, A., Didelez, J., et al. (2008). Measurement of the total photoabsorption cross section on a proton in the energy range 600-1500 MeV at the GRAAL. PHYSICS OF ATOMIC NUCLEI, 71(1), 75-82 [10.1134/S1063778808010080].

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

D'ANGELO, ANNALISA;FANTINI, ALESSIA;SCHAERF, CARLO;
2008-01-01

Abstract

The total photoabsorption cross section on a free proton was measured at the GRAAL facility in the energy range E-gamma = 600-1500 MeV. The large-aperture LAGRAN gamma E 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 empty-target measurements allowed the cross section sigma(tot) to be evaluated directly because of a low level of the electromagnetic background. Second, an algorithm for evaluating sigma(tot) on the basis of summing the dominating partial cross sections was developed. Experimental results obtained for sigma(tot) by the two methods are compared with existing data.
2008
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
BGO CALORIMETER; GAMMA-RAYS; PHOTOPRODUCTION; BEAM; NEUTRON; REGION
http://link.springer.com/article/10.1134%2FS1063778808010080
Bartalini, O., Bellini, V., Bocquet, J., Calvat, P., D'Angelo, A., Didelez, J., et al. (2008). Measurement of the total photoabsorption cross section on a proton in the energy range 600-1500 MeV at the GRAAL. PHYSICS OF ATOMIC NUCLEI, 71(1), 75-82 [10.1134/S1063778808010080].
Bartalini, O; Bellini, V; Bocquet, J; Calvat, P; D'Angelo, A; Didelez, J; Di Salvo, R; Fantini, A; Ghio, F; Girolami, B; Guidal, M; Giusa, A; Hourany, E; Ignatov, A; Kunne, R; Lapik, A; Levi Sandri, P; Lleres, A; Moricciani, D; Mushkarenkov, A; Nedorezov, V; Perrin, C; Rebreyend, D; Renard, F; Rudnev, N; Russew, T; Russo, G; Schaerf, C; Sperduto, M; Sutera, M; Turinge, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/38472
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