Neutron phase contrast tomography on isotope mixturesM. Zawisky1, U. Bonse2, F. Dubus1, Z. Hradil3 and J. Rehacek3
1 Atominstitute of the Austrian Universities - Vienna, Austria
2 University of Dortmund - Dortmund, Germany
3 Palacky University - Olomouc, Czech Republic
received 3 June 2004; accepted in final form 10 September 2004
published online 9 October 2004
Perfect crystal neutron interferometry is an extreme sensitive instrument for the detection of phase shifts induced in materials or magnetic fields. The utilisation of neutron beams and phase signals in tomography permits the investigation of weakly absorbing substances and isotope mixtures. Due to the larger fluctuation of count numbers and phases, an optimised maximum-likelihood algorithm has to be engaged. We present the analysis of isotope mixtures, which are nearly transparent to thermal neutrons, with a sensitivity of about 1% in the detection of isotopic density differences.
03.75.Dg - Atom and neutron interferometry.
42.30.Wb - Image reconstruction; tomography.
87.59.Fm - Computed tomography (CT).
© EDP Sciences 2004