Energy resolution of a silicon detector with the RX64 ASIC designed for X-ray imaging

Results from a silicon microstrip detector coupled to the RX64 ASIC are presented. The system is capable of single photon counting in digital X-ray imaging, with foreseen applications to dual energy mammography and angiography. The main features of the detecting system are low noise (operation with threshold as low as E4 keV is possible), good spatial resolution (a pixel of 100 mm � 300 mm when oriented edge-on) and good counting rate capability (up to one million counts per channel with a maximum rate of about 200 kHz per channel). The energy resolution of the system, as obtained with several fluorescence X-ray lines, is described. r 2003 Elsevier B.V. All rights reserved. PACS: 87.57.� s; 07.50.Qx; 29.40.Gx; 29.30.K