A gas-filled electroluminescence detector for EDXRF spectrometry

摘要

The design and features of a sealed-off proportional scintillation gas-filled detector (GSPC) are described. The use of a 50 urn Be window and an Xe-based gas mixture provides high efficiency of registration in the range 1.5-25 keV. The energy resolution changes from 18% for Al K alpha (1.49 keV) to 4.2% for Ag K alpha (22.2 keV). When the count rate on the unit output is 5 x 10(4) s(-1), the energy resolution at the Mn K alpha line does not exceed 9% at an entrance window area near 3 cm(2). The detector is operated at room temperature and does not require maintenance during operation. The service life of the detector is over 5 years and the radiation lifetime is practically unlimited. The detector is designed for use in EDXRF spectrometers instead of gas-filled proportional counters. Copyright (c) 2005 John Wiley & Sons, Ltd.