Scattering cross sections of liquid deuterium for ultracold neutrons: Experimental results and a calculation model

Abstract

We present scattering cross sections ${\sigma }_{\text{scatt}}$ of ultracold neutrons (UCN) in liquid deuterium at T = 20.6 K, as recently measured by means of a transmission experiment. The indispensable thorough raw data treatment procedure is explained. A calculation model for coherent and incoherent scattering in liquid deuterium in the hydrodynamic limit based on appropriate physical concepts is provided and shown to fit the data well. The applicability of the incoherent approximation for UCN scattering in liquid deuterium was tested and found to deliver acceptable results.

arXiv comment10 pages, 7 figures

References in corpus (3)

• Improved Determination of the Neutron Lifetime
• Precision Measurement of the Neutron Beta-Decay Asymmetry
• UCN Upscattering rates in a molecular deuterium crystal

Cited by in corpus (4)

• A hydrogen leak-tight, transparent cryogenic sample container for ultracold-neutron transmission measurements
• Measured velocity spectra and neutron densities of the PF2 ultracold-neutron beam ports at the Institut Laue--Langevin
• Scattering of ultracold neutrons from rough surfaces of metal foils
• Direct measurement of the scattering cross sections of liquid ortho-deuterium for ultracold neutrons and comparison with model calculations