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(English) Vertex identification of events in photonuclear reactions by cylindrical multiwire proportional chambers


In the framework of investigation of meson photo-production on proton and neutron in a deuterium target at the GRAAL experiment, we present a method to identify the vertex of interaction when in reaction products there are at least two charged particles, by the information provided by the cylindrical multiwire proportional chambers. By this device, we are able to obtain the direction of charged particles that leave the target after a photo-production reaction. For each charged particle, the device provides the coordinates of two points in the laboratory reference system, and the z-axis represents the beam direction. We calculate the trajectory of each charged particle and its cross point, representing the vertex of the reaction.

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G. Mandaglio, M. Manganaro, G. Giardina, V. Bellini, A. Giusa, F. Mammoliti, C. Randieri, G. Russo, M. L. Sperduto, C. Sutera, L. Casano, A. D’Angelo, R. Di Salvo, A. Fantini, D. Franco, D. Moricciani, C. Schaerf, V. Vegna, P. Levi Sandri, B. Girolami, F. Ghio, G. Gervino, J. P. Bocquet, A. Lleres, D. Rebreyend, F. Renard, A. S. Ignatov, A. M. Lapik, A. N. Mushkarenkov, V. G. Nedorezov, N. V. Rudnev, A. A. Turinge (2009).

Radiation Effects and Defects in Solids – May/June 2009, Vol. 164, Issues 5-6, pp. 325-329, ISSN: 1042-0150, doi: 10.1080/10420150902809551.

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Cristian Randieri

Cristian Randieri is a brilliant intelligent and great proactivity person and an effective communicator and visionary. He has built a strong (and deserved) reputation as someone with vision, diligence and honour. Cristian is not a simple engineer but he is a real Scientist. His knowledge is not restricted to the area it covers, but its impressive passion for all the technical topics led him to acquire great skills even in areas far from his original studies. Cristian is able to address and solve complex technical problems with excellent results. He is a valuable writer with great scientific background formed with more than 15 years of active research on experimental Nuclear Physics performed in the most famous international research laboratories such as CERN, ESRF, INF. He write about HI-Tech solutions topics and advanced research study applied to industry. With more than 150 scientific & technical publications, he is also, a technical and famous writer in Italy due to his interviews released to the most famous Industrial Italian magazines. Actually, he is the President & CEO of Intellisystem Technologies an Italian Research & Developments company committed to develop and sell innovative and advanced solutions.

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