Lanthanum bromide crystal detector for detecting outer space gamma rays

Abstract

The invention relates to a lanthanum bromide crystal detector for detecting outer space gamma rays. The lanthanum bromide crystal detector is provided with a scintillating crystal and signal readout equipment thereof, wherein a packaging shell is arranged outside the scintillating crystal; glass is arranged on the light emergent surface of the packaging shell; the lanthanum bromide crystal detector is characterized in that the scintillating crystal is in a form of a lanthanum bromide crystal; a filling material is filled between the lanthanum bromide crystal and the packaging shell thereof; the filling material is composed of an elastic silicon optical coupling agent, magnesium oxide and titanium oxide according to the weight ratio of (4-6):(4-6):1; and the thickness of the filling material is 3-4 mm. According to the lanthanum bromide crystal detector disclosed by the invention, the disadvantage that the lanthanum bromide crystal detector in the prior art only can be used in a ground observation instrument can be overcome; the problems caused by fragile and deliquescent characteristics of the lanthanum bromide crystal can be well solved by adopting a packaging manner and an internal filling manner; and the gamma ray detector developed by the invention has the detection efficiency capable of reaching 137Cs4%@662KeV, can normally work in a spatial environment, and has a steady working performance.

Description

technical field [0001] The present invention relates to a space astronomical detection instrument, in particular to a lanthanum bromide crystal detector for gamma ray detection in outer space. The instrument can be used for gamma ray detection in a space environment. Background technique [0002] In many space astronomical detection instruments and high-energy particle detection instruments, scintillation crystal detectors are mainly used, and their main components are scintillation crystals and their signal readout equipment. When high-energy incident particles enter the scintillator, the incident particles lose part or all of their energy, causing the scintillator to emit light of a certain wavelength, which is finally read out and recorded. [0003] As a scintillation crystal detector, the most important performance index is the detection efficiency. Detection efficiency is the ratio of the number of measurable pulse signals generated by particles in the scintillator to ...

AI Technical Summary

Problems solved by technology

But the state-of-the-art lanthanum bromide crystal detectors can only be used in ground-based observation instruments

The reason is that the lanthanum bromide crystal has a large specificity, is especially fragile, and is easy to deliquescence. These characteristics have always restricted its use as a scintillation crystal in space detectors, which limits the improvement of the efficiency of space detection instruments.

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