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Method for ionization chamber X, gamma energy response compensation by using titanium material

An energy response, ionization chamber technology, applied in the field of ionization chamber design, can solve problems such as tin paste compensation effect is not very ideal

Inactive Publication Date: 2013-03-06
CHINA INST FOR RADIATION PROTECTION
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  • Abstract
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  • Application Information

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Problems solved by technology

And when the gamma ray energy detected by the ionization chamber is above 3MeV, the compensation effect of tin paste is not ideal

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  • Method for ionization chamber X, gamma energy response compensation by using titanium material
  • Method for ionization chamber X, gamma energy response compensation by using titanium material

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Embodiment Construction

[0010] The present invention will be described in detail below in conjunction with the accompanying drawings and implementation process.

[0011] The present invention uses titanium material to flatten the response of the steel ionization chamber to X and γ radiation in the energy range of 0.08-7.0 MeV, so that it can 137 Within ±30% of Cs response. The ionization chamber collection pole is made of aluminum or titanium, and the high-voltage pole is made of stainless steel. A titanium lining is set on the inner surface of the stainless steel high-voltage pole. Since the atomic number of titanium is smaller than that of iron, the ionization chamber can be well optimized at 100-200keV The problem of overresponse in the energy range.

[0012] The response of the working gas in the sensitive volume of the ionization chamber to X and γ-rays mainly comes from the contribution of secondary electrons generated by the interaction between the ray and the chamber wall material. While th...

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Abstract

The invention relates to ionization chamber design technology of a radiation dosimeter, in particular to a method for ionization chamber X, gamma energy response compensation by using a titanium material. The method includes that a collector in an ionization chamber is made of aluminum or titanium materials, and under the condition that a high-voltage electrode is made of a stainless steel material, a titanium lining is arranged on an inner surface of the stainless steel high-voltage electrode. Since the titanium material of a suitable thickness is added on the inner surface of the steel high-voltage electrode, the problem of over-response of the steel ionization chamber to X, gamma rays within an energy range of 100-200keV is solved, response change of the steel ionization chamber to the X, gamma rays with energy larger than 300keV is slight, the method has an obvious effect on response curves of the X, gamma rays within a flattening energy range of 0.08-7.0MeV.

Description

technical field [0001] The invention relates to an ionization chamber design technology of a radiation dosimeter, in particular to a method for using titanium material to compensate the X and gamma energy responses of an ionization chamber. Background technique [0002] When measuring X and gamma radiation doses, the wall material of the ionization chamber can be non-air equivalent material. Considering the comprehensive performance requirements of the ionization chamber, such as mechanical properties, welding tightness, moisture resistance, corrosion resistance, and processing technology, the chamber walls (high voltage pole and collector) are generally made of high-quality alloy steel materials. For X, γ radiation dose and dose rate meters used for radiation protection, relevant national standards require that the response of X, γ radiation energy within the range of 0.08~1.5MeV must be within 137 Within ±30% of Cs response. However, the response of the steel ionization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/185
Inventor 靳根钱钟敏刘倍陈法国徐园王希涛杨亚鹏
Owner CHINA INST FOR RADIATION PROTECTION
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