Model for neutron total cross-section at low energies for nuclear grade graphite
- Galván Josa, Víctor Martín
- Dawidowski, Javier
- Santisteban, Javier Roberto
- Malamud, Florencia
- Oliveira, Rafael Gustavo
DOIAbstract
At subthermal neutron energies, polycrystalline graphite shows a large total cross-section due to small angle scattering processes. In this work, a new methodology to determine pore size distributions through the neutron transmission technique at subthermal energies is proposed and its sensitivity is compared with standard techniques. A simple model based on the form factor for spherical particles, normally used in the Small Angle Neutron Scattering technique, is employed to calculate the contribution of small angle effect to the total scattering cross-section, with the width and center of the radii distributions as free parameters in the model. Small Angle X-ray Scattering experiments were performed to compare results as a means to validat...
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