Affiliation: | (1) INFM - Dipartimento di Elettronica, Universita’ di Pavia, Via Ferrata 1 - 27100 Pavia, Italy (Fax: +39-382/422-583, E-mail: Agnesi@ipvsp4.unipv.it), IT;(2) Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Břehová 7, 115 19 Prague 1, Czech Republic, CZ |