A Combined Shielding Room for Low Background Gamma Spectrometer

Abstract

The invention relates to a combined shielded room of a low background gamma spectrometer, and belongs to the technical field of sample measurement equipment. The combined shield room of the low background gamma spectrometer mainly comprises a pedestal, a trailer, a barrier shield, refrigeration equipment of a detector, a cold finger, and a fixed shielded room with a side opening. The trailer performs rectilinear motion on the pedestal through a mechanical drive. The refrigeration equipment of the detector and the barrier shield are sequentially fixed on the trailer. The barrier shield is fixed on one end, close to the shield room with the side opening, of the trailer. A through hole is arranged in the lower portion of the barrier shield. The cold finger goes through the through hole and is sealed with the barrier shield. One end of the cold finger is connected with the refrigeration equipment, and the other end of the cold finger is connected with the detector. A sample is placed on the detector, and the trailer drives the barrier shield to move to combine with the fixed shielded room into an enclosed shielding cavity. According to the invention, the incompletely shielded room is utilized, and a mode of movements of the trail is adopted, so that a drawer type shielding structure forms through the combination. A practical problem that the low background anticoincidence gamma spectrometer is inconvenient in sample changing and operation by personnel is solved.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring and sample measuring equipment, and in particular relates to the structural design of a combined shielding room of a low-background gamma spectrometer. Background technique [0002] Low background gamma spectrometer is widely used in the analysis and measurement of environmental samples, such as water samples and biological samples, and is currently the most commonly used instrument for gamma nuclide energy spectrum analysis in environmental monitoring. A low background gamma spectrometer usually consists of four parts: [0003] 1. Gamma-ray detectors (hereinafter referred to as detectors). The detector is usually a high-purity germanium detector, or a Ge(Li) detector, or a NaI(Tl) scintillator detector. At present, in the field of γ-ray spectroscopy of environmental samples, high-purity germanium detectors are basically the mainstream. [0004] 2. Shielded room. The detector ...

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Problems solved by technology

[0014] The purpose of the present invention is to overcome the deficiencies in the prior art, and propose a combined shielding room for a low-background gamma spectrometer. Utilize an incomplete shielding room and adopt a trailer to move, and combine it into a drawer-type shielding structure. It solves the practical problems that the low-background anti-coincidence gamma spectrometer is not conducive to sample change and inconvenient for personnel to operate, and effectively improves the efficiency

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