X-[gamma] dosage detection device

Abstract

The present invention relates to an X-[gamma] dosage detection device. The X-[gamma] dosage detection device comprises a plastic scintillator, a ZnS scintillator, a photoelectric converter, an I-F conversion circuit, a processing circuit, a BGO scintillator and a shielding housing. The plastic scintillator is cylindrical, the center position of the front end of the plastic scintillator is providedwith a cylindrical groove; the ZnS scintillator is uniformly sprayed at the surface of the plastic scintillator except an optical output surface and a groove portion; and the BGO scintillator is putin the groove; the rear end of the plastic scintillator is connected with the photoelectric converter, and the photoelectric converter is connected with the I-F conversion circuit. The X-[gamma] dosage detection device is a key part in a portable X-[gamma] dosage rate instrument applied in the nuclear radiation detection field, a low-energy end of a composite detector is smooth in energy responseand small in deviation, introduced compensation materials BGO is low in compensation energy lower limit and cannot deliquesce, and compared to the NaI compensation, the technology is simple, and the size is flexible.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation measurement, in particular to an X-gamma dose detection device. Background technique [0002] With the development of the nuclear industry and the application of nuclear technology, a complete radiation protection monitoring system has been established in many places. In the measurement of environmental radioactivity, environmental gamma absorbed dose rate monitoring is an important monitoring parameter. It reflects the information on the changes in the natural background gamma radiation level of the environment, and it also represents the external exposure dose of gamma radiation generated in the environment to key groups of people or the public under normal operation and accident conditions of nuclear facilities or other radiation devices. Estimates provide data. [0003] Scintillation detectors have been widely used in X-gamma dose rate meters due to their high sensitivity and short...

AI Technical Summary

Problems solved by technology

It can meet the low-energy end compensation, but its disadvantage is that the energy-response curve fluctuates greatly, and the low-energy end reaches 40% deviation

In addition, there is another plan to place a NaI(Tl) scintillator in front of the plastic scintillator sprayed with ZnS(Ag). Because NaI(Tl) is extremely deliquescent, it must be sealed in a metal case with an optical glass window. NaI(Tl) ) The lower limit of compensation is only 80keV, and the energy response below 80keV is still contributed by ZnS(Ag), and the response at the low energy end is still low

Images