Solórzano, E.; Pardo-Alonso, S.; Kardjilov, N.; Manke, I.; Wieder, F.; Garcia-Moreno, F.; Rodríguez-Pérez, M.A.: Comparison between Neutron and X-ray Tomography: A Study on Polymer Foams. In: Veerle Cnudde ... [Ed.] : Tomography of Materials and Structures : Book of abstracts, Talks ; 1st International Conference on Tomography of Materials and Structures; ICTMS 2013, July 1-5 (Ghent, Belgium). Ghent, 2013. - ISBN 9789461971302, p. 65-68
This work aims at discussing the possibilities of high resolution neutron tomography, in comparison to conventional cone beam X-ray CT, based on the results on a set of polymeric foamed materials. The experiments have been carried out at the BER-II V7/CONRAD instrument and compared to the images obtained in a CT system based on a microfocus tube and a high resolution flat panel detector. This type of materials has not been previously examined with neutron imaging. The enhanced neutron attenuation relative to the X-ray attenuation encouraged this investigation. Nevertheless the results point to a better spatial resolution of X-rays in comparison with current neutron tomography resolution although pixel size was in the same order. Reasons behind these results point to a low signal to noise (S/N) ratio in neutron tomography due to the rather low neutron flux and the beam collimating (L/D) ratio causing a reduction in the spatial resolution. Nevertheless the contrast of polymeric materials in neutron imaging offers further possibilities for future developments in high resolution neutron tomography.