Color changes in X-ray irradiated PM-355 and Makrofol DE 7-2 nuclear track detectorsSamir A. Nouh, Amal Mohamed, Radiyah Ahmed Bahareth, Maymona M. Abutalib and Kaoutar BenthamiEur. Phys. J. Appl. Phys., 65 3 (2014) 30201DOI: https://doi.org/10.1051/epjap/2014130422