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Superthermal neutron flux detector for BNCT

A technology of detectors and thermal neutrons, applied in the direction of neutron radiation measurement, instruments, measuring devices, etc., can solve problems such as difficult to meet actual needs, cumbersome operation process, and low measurement accuracy, and achieve simple structure and high measurement accuracy , the effect of rapid measurement

Active Publication Date: 2019-06-18
LANZHOU UNIVERSITY
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Problems solved by technology

At present, the methods used in BNCT radiation field neutron energy spectrum and flux measurement are mainly multi-sphere spectrometer method and multi-foil activation method. However, the operation procedures of these two methods are cumbersome, time-consuming, and low in measurement accuracy, so they cannot be applied to BNCT. Accurate and rapid evaluation of neutron source quality (especially daily quality) and precise evaluation of neutron radiation dose are difficult to meet actual needs

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  • Superthermal neutron flux detector for BNCT
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  • Superthermal neutron flux detector for BNCT

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0017] Such as Figure 1-Figure 2 As shown, the epithermal neutron flux detector for BNCT according to the embodiment of the present invention is spherical with a diameter of 61.65 mm. The geometric center of the detector is provided with a boron carbide (B 4 C) The activation material wrapped by layer 3 , the activation material is manganese (Mn) foil 4 . The detector uses a polyethylene ball 2 with a diameter of 61.60 mm, and its outer surface is wrapped with a cadmium (Cd) foil 1 with a thick...

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Abstract

The invention discloses a superthermal neutron flux detector for BNCT. The detector is in a spherical shape and has the diameter of 61.65 mm. The geometric center position of the detector is providedwith an activating material wrapped by a boron carbide (B4C) layer, and the activating material is manganese (Mn) foil. The detector adopts a polyethylene ball with the diameter of 61.60 mm, and the outer surface of the detector is wrapped by cadmium (Cd) foil with the thickness of 0.025 mm. The thickness of the boron carbide (B4C) layer is 0.18 mm, and the boron carbide (B4C) layer is wrapped onthe outer surface of the manganese (Mn) foil. The superthermal neutron flux detector for the BNCT can realize accurate and rapid measurement of the superthermal neutron flux in the BNCT radiation field without measuring a neutron energy spectrum, and is innovative; meanwhile, the superthermal neutron flux detector for the BNCT is high in measurement precision (higher than 5%), simple in structureand convenient to use and has great application prospects.

Description

technical field [0001] The invention relates to the field of measurement of neutron flux in BNCT radiation field, in particular to an epithermal neutron flux detector for BNCT. Background technique [0002] In recent years, malignant tumor has become the first cause of death among Chinese residents, and it is the most serious public health problem facing our country. Therefore, it is an urgent need for the whole society to continuously improve the effect of tumor treatment, prolong the survival time of patients, and improve the quality of life of patients from the perspective of medical technology. [0003] Boron neutron capture therapy (BNCT) technology is a promising and rapidly developing advanced radiation therapy technology, which has the characteristics of precise targeting, high relative biological effect and short course of treatment. BNCT technology has special therapeutic advantages for diffuse or invasive malignant cancers with large or ill-defined borders, recur...

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Application Information

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IPC IPC(8): A61N5/10G01T3/00
Inventor 关兴彩龚依王铁山
Owner LANZHOU UNIVERSITY
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