Experimental study on the measurement of uranium casting enrichment by time-dependent coincidence method

XIE Wen-Xiong; LI Jian-Sheng; GONG Jian; ZHU Jian-Yu; HUANG Po

doi:10.1088/1674-1137/37/10/106202

Chinese Physics C> 2013, Vol. 37> Issue(10) : 106202 DOI: 10.1088/1674-1137/37/10/106202

Experimental study on the measurement of uranium casting enrichment by time-dependent coincidence method

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Based on the time-dependent coincidence method, a preliminary experiment has been performed on uranium metal castings with similar quality (about 8-10 kg) and shape (hemispherical shell) in different enrichments using neutron from Cf fast fission chamber and timing DT accelerator. Groups of related parameters can be obtained by analyzing the features of time-dependent coincidence counts between source-detector and two detectors to characterize the fission signal. These parameters have high sensitivity to the enrichment, the sensitivity coefficient (defined as (ΔR/Δm)/R) can reach 19.3% per kg of ²³⁵U. We can distinguish uranium castings with different enrichments to hold nuclear weapon verification.

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XIE Wen-Xiong, LI Jian-Sheng, GONG Jian, ZHU Jian-Yu and HUANG Po. Experimental study on the measurement of uranium casting enrichment by time-dependent coincidence method[J]. Chinese Physics C, 2013, 37(10): 106202. doi: 10.1088/1674-1137/37/10/106202

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Received: 2012-09-14
Revised: 1900-01-01

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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

Experimental study on the measurement of uranium casting enrichment by time-dependent coincidence method

Corresponding author: XIE Wen-Xiong,

Received Date: 2012-09-14

Accepted Date: 1900-01-01

Available Online: 2013-10-05

Abstract: Based on the time-dependent coincidence method, a preliminary experiment has been performed on uranium metal castings with similar quality (about 8-10 kg) and shape (hemispherical shell) in different enrichments using neutron from Cf fast fission chamber and timing DT accelerator. Groups of related parameters can be obtained by analyzing the features of time-dependent coincidence counts between source-detector and two detectors to characterize the fission signal. These parameters have high sensitivity to the enrichment, the sensitivity coefficient (defined as (ΔR/Δm)/R) can reach 19.3% per kg of ²³⁵U. We can distinguish uranium castings with different enrichments to hold nuclear weapon verification.

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Experimental study on the measurement of uranium casting enrichment by time-dependent coincidence method

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