Neutron Diffraction by the Gases N2, CF4, and CH4

Abstract
Neutron diffraction patterns for the gases nitrogen, carbon tetrafluoride, and methane are given for a neutron wavelength of 1.063A. It is found that the coherent scattering cross sections of nitrogen and fluorine are nearly equal to the total cross sections, and that the C—F bond length in carbon tetrafluoride is 1.33A. The error in a semiclassical form of the differential scattering cross section is discussed.