Scintillator and scintillator detector

Abstract

The invention discloses a scintillator and a scintillator detector including the scintillator. The scintillator with the section approximate to trapezoid is provided with a reflection groove, an opening end of which is positioned at a large end face of the scintillator, and the width of the opening end gradually diminishes from the large end face to a small end face of the scintillator. According to the invention, a reflection face is added by means of the arrangement of the reflection groove, thereby reducing average optical path of lights, enhancing proportion of effective signals and raising detection efficiency of the detector; in addition, optical path difference of lights is reduced, the full width at half maximum (FWHM) and one-tenth height and width of signals are lessened, so time resolution of the detector is enhanced; and the scintilator and the scintillator detector also save material and lower cost.

Description

technical field [0001] The invention relates to a scintillator and a scintillator detector, in particular to a scintillator and a scintillator detector with reflection grooves. Background technique [0002] Positron annihilation technology can non-destructively detect the microscopic defect information near the surface of materials, and is an effective means to analyze the properties of materials. In the positronium time-of-flight spectroscopy (Ps-TOF) measurement method, the relevant information of the material is mainly obtained through the o-Ps flying out of the material surface. Or triple gamma annihilation, the resulting gamma is emitted at a 4π solid angle. For Ps-TOF, the main thing to collect is the gamma whose emission direction is perpendicular to the positronium flight axis. Therefore, it is only necessary to emit The γ can be collected. In order to obtain as much information as possible, the collection efficiency of the γ emitted at an angle of 2π in the plane ...

AI Technical Summary

Problems solved by technology

It can be found that the smaller the apex angle of the cone, the more favorable the reflection of light from the large end to the small end, but to converge to a suitable area, the required light cone size is larger, resulting in a larger average optical path and optical path difference, resulting in signal At the same time, due to the multiple reflections of light inside the scintillator and the self-absorption of the scintillator, it will cause light loss, which will interfere with the collection and analysis of the signal and affect the accuracy of the experimental results.

Moreover, in the process of reflection, due to the continuous decrease of the incident angle, there may be a situation where the light is reversed to the large end face, and the impact on the signal is more prominent

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