Measurement method and device for AB-BNCT mixed radiation field dose distribution

Abstract

The invention discloses a measurement method and device for AB-BNCT mixed radiation field dose distribution. The measurement method comprises the steps that neutrons act with an optical fiber array togenerate first radiological fluorescence, and gamma acts with the optical fiber array to generate second radiological fluorescence and Cherenkov radiation; the first radiological fluorescence, the second radiological fluorescence and the Cerenkov radiation are transmitted to the sensor along the optical fiber; the first radiological fluorescence, the second radiological fluorescence and the Cherenkov radiation are sequentially converted into an electric signal and a digital signal, and the electric signal and the digital signal are transmitted to a computer; obtaining digital signals of radiofluorescence and Cherenkov radiation respectively generated by neutrons and gamma radiation by utilizing the difference between the optical fiber array and the interaction between the neutrons and thegamma radiation; and rotating the optical fiber array to obtain the digital signals of the radiofluorescence and the Cherenkov radiation at different angles. According to the invention, discrimination and quick measurement of the mixed radiation field are realized, and the method has an important value for nuclear technology application, especially medical application.

Description

technical field [0001] The invention relates to the field of nuclear radiation detection, in particular to a method and device for measuring the dose distribution of an AB-BNCT (Accelerator based Boron Neutron Capture Therapy, accelerator neutron source boron neutron capture therapy) mixed radiation field. Background technique [0002] At present, the measurement techniques for neutron and gamma mixed radiation fields mainly include paired thermoluminescence dosimeters, paired ionization chambers, Frick gel dosimeters and film dosimeters. Among them, paired thermoluminescent dosimeters and paired ionization chambers are measurement methods for a single point of interest, and the measurement efficiency is low. If multiple sets of measurement devices are used to measure a large area of ​​radiation field, it will cost a lot and it is difficult to apply Dose distribution measurements in radiation fields. Frick gel needs to add 10B elements to change its difference in response t...

AI Technical Summary

Problems solved by technology

Among them, paired thermoluminescent dosimeters and paired ionization chambers are measurement methods for a single point of interest, and the measurement efficiency is low. If multiple sets of measurement devices are used to measure a large area of ​​radiation field, it will cost a lot and it is difficult to apply Dose distribution measurement in radiation field

Frick gel needs to add 10B elements to change its difference in response to neutrons and gammas. It is a passive measurement method, and the operation process is cumbersome and time-consuming.

The use of film dosimeters to measure radiation field dose requires high-precision readout equipment, and there are many precautions in the readout process, which has the disadvantage of not being able to measure in real time

None of these methods and devices can achieve accurate and real-time measurement of dose distribution in mixed radiation fields

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