Cold neutron scattering in imperfect deuterium crystals

Abstract

The differential cross sections for cold neutron scattering in mosaic deuterium crystals have been calculated for various target temperatures. The theoretical results are compared with the recent experimental data for the neutron wavelengths $\lambda \approx$~1--9~Å. It is shown that the structures of observed Bragg peaks can be explained by the mosaic spread of about $3^{\circ }$ and contributions from a~limited number of crystal orientations. Such a~crystal structure should be also taken into account in ultracold neutron upscattering due to the coherent phonon annihilation in solid deuterium.

14 pages, 5 figures

References in corpus (7)

• An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
• Measurement of the neutron lifetime using a gravitational trap and a low-temperature Fomblin coating
• Measurement of quantum states of neutrons in the Earth's gravitational field
• Demonstration of a solid deuterium source of ultra-cold neutrons
• A direct experimental limit on neutron -- mirror neutron oscillations
• Differential cross sections for muonic atom scattering from hydrogenic molecules
• Differential cross sections for muonic atom scattering in solid hydrogenic targets