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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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A wave of new U.S.-U.K. deals ahead of Trump’s state visit
President Trump will arrive in the United Kingdom this week for a state visit that promises to include the usual pomp and ceremony alongside the signing of a landmark new agreement on U.S.-U.K. nuclear collaboration.
Ryota Katano
Nuclear Science and Engineering | Volume 193 | Number 4 | April 2019 | Pages 431-439
Technical Paper | doi.org/10.1080/00295639.2018.1528803
Articles are hosted by Taylor and Francis Online.
The linear combination method is proposed to reduce the higher order mode (HOM) effect on the measurement of the prompt neutron decay constant using the α-fitting method. Conventional α-fitting utilizes the pulsed neutron source and estimates the prompt neutron decay constant by fitting the neutron counts at a single detector after pulse injection with a single exponential function. The proposed method reduces the spatial HOM effect with linear combination of the neutron counts at multiple detectors. For verification, we applied the conventional method and the proposed method to the analytical solution of the diffusion theory and the Monte Carlo simulation to estimate the prompt neutron decay constant of a one-dimensional infinite slab. Comparison of these results indicates that the proposed method enables estimation with the reduced HOM effect as opposed to the conventional method. Through the verification, we confirmed that the proposed method can be a candidate for a measurement method of the prompt neutron decay constant.