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Neutron retarding material

A neutron and retardation technology, applied in radiation/particle treatment, X-ray/γ-ray/particle irradiation therapy, radiotherapy, etc., can solve undiscovered problems

Active Publication Date: 2017-07-11
NEUBORON MEDTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No screening of neutron retarding materials for phantom beam quality for neutron beams has been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] al 2 o 3 It has the properties of large cross-section of fast neutron and small cross-section of epithermal neutron, so Al without adding any Li-containing substance 2 o 3 For the comparative test of this embodiment, the prosthetic beam quality of this embodiment and the comparative test is calculated by MCNP software as shown in Table 1.

[0035] Table 1: To contain Al 2 o 3 Prosthetic beam quality of neutron capture therapy device with neutron retarding material as retarding body

[0036]

Embodiment 2

[0038] BaF 2 It has the property of large fast neutron action cross section and small epithermal neutron action cross section, so BaF without adding any Li-containing substances 2 For the comparative test of this embodiment, the prosthetic beam quality of this embodiment and the comparative test is calculated by MCNP software as shown in Table 2.

[0039] Table 2: To contain BaF 2 Prosthetic beam quality of neutron capture therapy device with neutron retarding material as retarding body

[0040]

[0041]

Embodiment 3

[0043] CaF 2 It has the properties of large fast neutron action cross section and small epithermal neutron action cross section, so CaF without adding any Li-containing substances 2 For the comparative test of this embodiment, the prosthetic beam quality of this embodiment and the comparative test is calculated by MCNP software as shown in Table 3.

[0044] Table 3: To contain CaF 2 Prosthetic beam quality of neutron capture therapy device with neutron retarding material as retarding body

[0045]

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Abstract

The invention discloses a neutron retarding material composed of a lithium-containing substance and a material with a large fast neutron effect cross section and a small epithermal neutron effect cross section. The neutron retarding material is used in the beam shaper of a neutron capture therapeutic device as a retarder. The lithium-containing substance is added to a conventional neutron retarding material to improve the quality of the prosthetic beam of a neutron beam retarded by the neutron retarding material.

Description

technical field [0001] The invention relates to a radioactive ray slowing material, especially a neutron slowing material. Background technique [0002] Neutron retarding materials are often used in the beam shaper of neutron capture therapy devices to adjust the neutron beam with a wide energy spectrum emitted from the neutron source into a neutron beam with a certain energy range. During the treatment process of the neutron capture therapy device, not only the quality of the air beam, but also the quality of the prosthesis beam should be considered to affect the treatment effect. No screening of neutron retarding materials for phantom beam quality of neutron beams has been found so far. Contents of the invention [0003] In the process of using the neutron capture therapy device for treatment, the beam quality of the phantom of the neutron capture therapy device determines the treatment effect, wherein, the neutron retarder that constitutes the retarder in the neutron c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10
CPCA61N5/10A61N5/103A61N5/1077A61N2005/109G21K1/00
Inventor 刘渊豪陈韦霖
Owner NEUBORON MEDTECH
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