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arXiv · 0911.4115

Surface roughness effect on ultracold neutron interaction with a wall and implications for computer simulations

A. Steyerl·S. S. Malik·A. M. Desai·C. Kaufman
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Abstract

We review the diffuse scattering and the loss coefficient in ultracold neutron reflection from slightly rough surfaces, report a surprising reduction in loss coefficient due to roughness, and discuss the possibility of transition from quantum treatment to ray optics. The results are used in a computer simulation of neutron storage in a recent neutron lifetime experiment that re-ported a large discrepancy of neutron lifetime with the current particle data value. Our partial re-analysis suggests the possibility of systematic effects that were not included in this publication.

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A. Steyerl, S. S. Malik, A. M. Desai, C. Kaufman. 2010-01-30. Surface roughness effect on ultracold neutron interaction with a wall and implications for computer simulations. https://doi.org/10.1103/physrevc.81.055505%2010.1103%2Fphysrevc.82.059905

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