Chinese Physics C > 2010, Vol. 34 > Issue(5): 606-609 DOI: 10.1088/1674-1137/34/5/019

Improvement of the determination of hydrogen content in a multicomponent sample by D—T generator

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If a D—T generator is used as a neutron source to simultaneously measure the content of carbon, hydrogen and oxygen in a multicomponent sample by NIPGA (Neutron Induced Prompt Gamma-ray Analysis), the 14 MeV neutron flux can be regarded as a constant value. The relationship between the production of the hydrogen characteristic gamma-rays and its content is nonlinear. In this paper, we use MCNP (Monte Carlo N-Particle Transport code) to simulate the relationship and analyze it. In practical measurement of the characteristic gamma-ray, it's impossible to get the net count. Therefore, we use the experiment to obtain the relationship between the hydrogen content and the total count of its characteristic gamma-rays. If we use the relationship combined
with the simulation result to calculate the hydrogen content, the metrical precision can be much increased. The deviation of hydrogen content between NIPGA and chemical analysis is less than 0.25%, which meets the requirement of coal industry.

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CHENG Dao-Wen, GU De-Shan, LIU Lin-Mao, JIA Fu-Quan and LI Xiang-Long. Improvement of the determination of hydrogen content in a multicomponent sample by D—T generator[J]. Chinese Physics C, 2010, 34(5): 606-609. doi: 10.1088/1674-1137/34/5/019

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Received: 2009-12-08
Revised: 2009-12-24

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Improvement of the determination of hydrogen content in a multicomponent sample by D—T generator

Corresponding author:CHENG Dao-Wen,

Received Date:2009-12-08

Accepted Date:2009-12-24

Available Online:2010-05-05

Abstract:

If a D—T generator is used as a neutron source to simultaneously measure the content of carbon, hydrogen and oxygen in a multicomponent sample by NIPGA (Neutron Induced Prompt Gamma-ray Analysis), the 14 MeV neutron flux can be regarded as a constant value. The relationship between the production of the hydrogen characteristic gamma-rays and its content is nonlinear. In this paper, we use MCNP (Monte Carlo N-Particle Transport code) to simulate the relationship and analyze it. In practical measurement of the characteristic gamma-ray, it's impossible to get the net count. Therefore, we use the experiment to obtain the relationship between the hydrogen content and the total count of its characteristic gamma-rays. If we use the relationship combined
with the simulation result to calculate the hydrogen content, the metrical precision can be much increased. The deviation of hydrogen content between NIPGA and chemical analysis is less than 0.25%, which meets the requirement of coal industry.

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Improvement of the determination of hydrogen content in a multicomponent sample by D—T generator

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