Measurement and analysis of the 238U(n, 2n) reactionrate in depleted uranium/polyethylene shells

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YAN Xiao-Song, LIU Rong, LU Xin-Xin, JIANG Li, WEN Zhong-Wei and HAN Zi-Jie. Measurement and analysis of the 238U(n, 2n) reactionrate in depleted uranium/polyethylene shells[J]. Chinese Physics C, 2012, 36(7): 670-674. doi: 10.1088/1674-1137/36/7/018
YAN Xiao-Song, LIU Rong, LU Xin-Xin, JIANG Li, WEN Zhong-Wei and HAN Zi-Jie. Measurement and analysis of the 238U(n, 2n) reactionrate in depleted uranium/polyethylene shells[J]. Chinese Physics C, 2012, 36(7): 670-674.  doi: 10.1088/1674-1137/36/7/018 shu
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Received: 2011-09-09
Revised: 1900-01-01
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Measurement and analysis of the 238U(n, 2n) reactionrate in depleted uranium/polyethylene shells

    Corresponding author: YAN Xiao-Song,

Abstract: In order to check the conceptual design of the subcritical blanket in a fusion-fission hybrid reactor, a depleted uranium/polyethylene simulation device with alternate shells has been established. The measurement of the 238U(n, 2n) reaction rate was carried out using an activation technique, by measuring the 208 keVγ rays emitted from 237U. The self-absorption of depleted uranium foils with different thicknesses was experimentally corrected. The distribution of the 238U(n, 2n) reaction rate at 90° to the incident D+ beam was obtained, with uncertainty between 5.3% and 6.0%. The experiment was analyzed using MCNP5 code with the ENDF/BVI library, and the calculated results are all about 5% higher than the measured results.

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