A gas‐filled electroluminescence detector for EDXRF Spectrometry

Abstract

The design and features of a sealed-off proportional scintillation gas-filled detector (GSPC) are described. The use of a 50 µm 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 Ka (1.49 keV) to 4.2% for Ag Ka (22.2 keV). When the count rate on the unit output is 5 × 10 4 s −1 , the energy resolution at the Mn Ka 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.

Atomic spectrometry update—X-ray fluorescence spectrometry

“…37 Using a P10 gas mixture an energy resolution of 12.3 percent was obtained at 5.9 keV with a working count rate up to 1 kcps. A sealed gas proportional scintillation counter (GPSC) was described by Goganov and Schultz 38 for use in industrial EDXRF systems. The combination of a xenon gas fill and a 50 mm beryllium entrance window yielded good efficiency over the whole energy range of 1.5 to 25 keV and the energy resolution was reported to be 18 percent for Al K (1.5 keV), 9 percent at 5.9 keV and 4.2 percent for Ag Ka at 22.2 keV and a maximum count rate of 50 kcps was indicated.…”

Development of a parallel-plate avalanche counter with optical readout (O-PPAC)

“…On the other hand, electroluminescence-based detectors (EL) are rapidly emerging as alternative solutions to conventional PCs based on charge readout, thanks to the introduction of novel, high-sensitivity solid-state photo-detector technologies [8][9][10][11][12]. The operational principle of position-sensitive EL detectors is based on reading out the scintillation light produced via secondary mechanisms in the course of the electron avalanche process.…”

Measurements of secondary scintillation in low-pressure CF4with a SiPM, from a parallel-plate avalanche geometry

“…On the other hand, the recent progress of solid-state photo-detectors [15,16], triggered by particle [17][18][19], astro-particle [29][30][31] and medical physics [32], resulted in new class of siliconbased devices (i.e. Avalanche Photo-Diodes -APDs, Silicon Photo-Multipliers -SiPM, Hybrid Photo-Detector -HPD) with several substantial improvements compared to other conventional vacuum PMT technology, opening new possibilities for exploring applications of GASD in a variety of new areas.…”