Characteristics and performance of thin LaBr3(Ce) crystal for hard X-ray astronomy
Review articleOpen access

AbstractWe have developed a new detector using thin lanthanum bromide crystal (32 × 3 mm) for use in X-ray astronomy. The instrument was launched in high altitude balloon flight on two different occasions, December 21, 2007, which reached a ceiling altitude of 4.3 mbs and April 25, 2008 reaching a ceiling altitude 2.8 mbs. The observed background counting rate at the ceiling altitude of 4 mbs was ∼4 × 10−3 ct cm−2 s−1 keV−1 sr−1. This paper describes the details of the experiment, the detector characteristics, and the background behaviour at the ceiling altitude.

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