Scattering influences in quantitative fission neutron radiography for the in situ analysis of hydrogen distribution in metal hydrides

作者：Boerries S^*; Metz O; Pranzas P K; Buecherl T; Soellradl S; Dornheim M; Klassen T; Schreyer A

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2015, 797: 158-164.

DOI：10.1016/j.nima.2015.06.033

• Quantitative neutron radiography
• Hydrogen
• Hydrogen storage
• Scattering corrections
• Fission neutrons

In situ neutron radiography allows for the time resolved study of hydrogen distribution in metal hydrides. However, for a precise quantitative investigation of a time dependent hydrogen content within a host material, an exact knowledge of the corresponding attenuation coefficient is necessary. Additionally, the effect of scattering has to be considered as it is known to violate Beer's law, which is used to determine the amount of hydrogen from a measured intensity distribution. Within this study, we used a metal hydride inside two different hydrogen storage tanks as host systems, consisting of steel and aluminum. The neutron beam attenuation by hydrogen was investigated in these two different setups during the hydrogen absorprion process. A linear correlation to the amount of absorbed hydrogen was found, allowing for a readily quantitative investigation. Further, an analysis of scattering contributions on he measured intensity distributions was performed and is described in detail.

• 出版日期2015-10-11