Measurements of the scintillation time constants of inorganic crystals for the development of a triple-Phoswich detector for high-energy X-ray quanta

Astronomy and Astrophysics – Astronomy

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Metal Crystals, Scintillation, Scintillation Counters, Time Constant, X Ray Astronomy, Product Development, Radiation Detectors, X Ray Telescopes

Scientific paper

A setup for the measurement of the rise time distribution of pulses measured by a triple-Phoswich detector that is planned as component of an imaging system of a rotation-modulation telescope (RMT) was built. The principles and characteristics of scintillation crystals, scintillation detectors, and RMT's are outlined. Measurements on CsT(Tl) test crystals show a strong dependence of rise time distribution on Tl-concentration, and a clear dependence on temperature. A system for optimum light collection was developed for a Phoswich detector. The scintillation crystals NaJ(Tl) and CsJ(Na) are very suitable for a strip Phoswich. Proposals for a triple-Phoswich as detector for an RMT are given.

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