A Pulse Processor for X-Ray Spectrometry with Si(Li)-Detectors

This paper describes the general features of a pulse processor for use with opto-electronic charge sensitive head amplifiers particularly with Si(Li) X-ray detectors. The instrument contains time-variant filters with direct coupled amplifiers and comprehensive pile-up protection and live time correction. The test results indicate that the system can cope with extremely wide range of signal processing times, counting rates and changes of spectral content without any appreciable degradation in energy resolution and with useful output rates for input rates up to well over 50,000 events/sec.