Silver bismuth iodine single crystal, preparation method and applications thereof

Abstract

The invention discloses a silver bismuth iodine single crystal. According to the silver bismuth iodine single crystal, the chemical formula is AgBi2I7, and the crystal has a face-centered cubic structure; the cell parameters comprise that a, b and c are the same and equal to 12.22 angstrom, and alpha, beta and gamma are the same and equal to 90 DEG; and each Bi<3+> and the surrounding eight I<-> form a regular hexahedron, and each Ag<+> and the surrounding six I<-> form a regular octahedron. According to the invention, the crystal is a novel radiation detection material, and is environmentallyfriendly; the X-ray detection sensitivity of the detector prepared from the crystal is 364.7 [mu]CGy[air]<-1>cm<-2>, is equivalent to the sensitivity (318 [mu]CGy[air]<-1>cm<-2>) of the traditional tellurium-zinc-cadmium X-ray detector, and is higher than the sensitivity (20 [mu]CGy[air]<-1>cm<-2>) of the amorphous selenium X-ray detector; and the novel Bi-based halide single crystal material canfurther be used for X-ray imaging and preparation of gamma-ray detectors.

Description

Technical field [0001] The invention relates to a radiation detection crystal material, specifically a chemical formula of AgBi 2 I 7 Bi-based halide single crystal material, its preparation method and the application of the prepared device in the field of radiation detection. Background technique [0002] X-ray detection plays a vital role in medical imaging, safety inspection, industrial non-destructive testing, national defense security, and cosmic radiation detection. Therefore, the research on X-ray detection materials is very necessary. [0003] In the early nuclear radiation detection, gas ionization detectors and scintillation crystal detectors have been widely used. However, gas ionization detectors are large in size, inconvenient to carry, and have low X-ray blocking ability, and the detection efficiency is very low. The detector, although its detection efficiency is high, but its energy resolution is poor, and still cannot meet the needs of use. In the second half of th...

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Problems solved by technology

[0003] In the early detection of nuclear radiation, gas ionization detectors and scintillation crystal detectors have been widely used, but gas ionization detectors are bulky, inconvenient to carry, and have low X-ray blocking ability, so the detection efficiency is very low. Detector, although its detection efficiency is very high, but the energy resolution is poor, still can not meet the needs of use

In the second half of the 20th century, semiconductor nuclear radiation detectors emerged. The initial semiconductor detectors were small in size and good in energy resolution, but their detection efficiency was low, and they required low working and storage temperatures.

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