The response of AGATA segmented HPGe detectors to gamma rays in the energy range 2-15 MeV was measured. The 15.1 MeV gamma rays were produced using the reaction d(B-11,n gamma)C-12 at E-beam=19.1 MeV, while gamma rays between 2 and 9 MeV were produced using an Am-Be-Fe radioactive source. The energy resolution and linearity were studied and the energy-to-pulse-height conversion resulted to be linear within 0.05%.Experimental interaction multiplicity distributions are discussed and compared with the results of Geant4 simulations. It is shown that the application of gamma-ray tracking allows a suppression of background radiation caused by n-capture in Ge nuclei. Finally the Doppler correction for the 15.1 MeV gamma line, performed using the position information extracted with Pulse-shape analysis is discussed.
Response of AGATA segmented HPGe detectors to gamma rays up to 15.1MeV / F. Crespi, R. Avigo, F. Camera, S. Akkoyun, A. Ataç, D. Bazzacco, M. Bellato, G. Benzoni, N. Blasi, D. Bortolato, S. Bottoni, A. Bracco, S. Brambilla, B. Bruyneel, S. Ceruti, M. Ciemała, S. Coelli, J. Eberth, C. Fanin, E. Farnea, A. Gadea, A. Giaz, A. Gottardo, H. Hess, M. Kmiecik, S. Leoni, A. Maj, D. Mengoni, C. Michelagnoli, B. Million, D. Montanari, R. Nicolini, L. Pellegri, F. Recchia, P. Reiter, S. Riboldi, C. Ur, V. Vandone, J. Valiente-Dobon, O. Wieland, A. Wiens. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 705(2013 Mar 21), pp. 47-54. [10.1016/j.nima.2012.12.084]
Response of AGATA segmented HPGe detectors to gamma rays up to 15.1MeV
F. Crespi;R. Avigo;F. Camera;S. Bottoni;A. Bracco;S. Ceruti;A. Giaz;S. Leoni;R. Nicolini;S. Riboldi;V. Vandone;
2013
Abstract
The response of AGATA segmented HPGe detectors to gamma rays in the energy range 2-15 MeV was measured. The 15.1 MeV gamma rays were produced using the reaction d(B-11,n gamma)C-12 at E-beam=19.1 MeV, while gamma rays between 2 and 9 MeV were produced using an Am-Be-Fe radioactive source. The energy resolution and linearity were studied and the energy-to-pulse-height conversion resulted to be linear within 0.05%.Experimental interaction multiplicity distributions are discussed and compared with the results of Geant4 simulations. It is shown that the application of gamma-ray tracking allows a suppression of background radiation caused by n-capture in Ge nuclei. Finally the Doppler correction for the 15.1 MeV gamma line, performed using the position information extracted with Pulse-shape analysis is discussed.
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