Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1826114 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2010 | 7 Pages |
Abstract
Measurements of the neutron brightness from a solid methane moderator were performed at the Low Energy Neutron Source (LENS) at the Indiana University Cyclotron Facility (IUCF) to characterize the source and to test our new neutron scattering model of phase II solid methane [1]. A time-of-flight method was used to measure the neutron energy spectrum from the moderator in the energy range of 0.1Â meV â¼1eV. Neutrons were counted with a high efficiency 3He detector. The solid methane in the moderator occupied phase II and the energy spectra were measured at 20Â K and 4Â K. We tested our newly developed scattering kernels for phase II solid methane by calculating the neutron brightness expected from the methane moderator at the LENS neutron source using MCNP (Monte Carlo N-particle Transport Code). Within the accuracy of our approximate approach, our model correctly predicts the neutron brightness at both temperatures.
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Yunchang Shin, C.M. Lavelle, W. Mike Snow, David V. Baxter, Xin Tong, Haiyang Yan, Mark Leuschner,