The wavelength dependence of the effective neutron cross section for hydrogen has been investigated by measuring the transmitted total scattering cross section in urea, beta -alanine, tartaric acid and polyethylene over the energy range 3meV to 10eV. Under the assumption that carbon, nitrogen and oxygen atoms contribute a small and invariant amount to the measured total cross section, these data represent a direct measure of the wavelength dependence of the overall scattering contribution of the hydrogen atoms to the total cross section. These experimental data can be used to apply effective wavelength-dependent corrections to neutron scattering data of hydrogen-rich simple organic compounds.
Capelli, S.c., Romanelli, G. (2019). An effective hydrogen scattering cross section for time-of-flight neutron experiments with simple organic molecules. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 52(5), 1233-1237 [10.1107/S1600576719011592].
An effective hydrogen scattering cross section for time-of-flight neutron experiments with simple organic molecules
Romanelli G.
2019-01-01
Abstract
The wavelength dependence of the effective neutron cross section for hydrogen has been investigated by measuring the transmitted total scattering cross section in urea, beta -alanine, tartaric acid and polyethylene over the energy range 3meV to 10eV. Under the assumption that carbon, nitrogen and oxygen atoms contribute a small and invariant amount to the measured total cross section, these data represent a direct measure of the wavelength dependence of the overall scattering contribution of the hydrogen atoms to the total cross section. These experimental data can be used to apply effective wavelength-dependent corrections to neutron scattering data of hydrogen-rich simple organic compounds.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
