eng Science and Education Publishing American Journal of Materials Engineering and Technology 2333-8911 2021-08-19 9 1 1 20 10.12691/materials-9-1-1 MATERIALS2021911 article Alireza Heidari 1 2 3 4 Margaret Hotz 4 4 4 Nancy MacDonald 4 4 4 Victoria Peterson 4 4 4 Angela Caissutti 4 4 4 Elizabeth Besana 4 4 4 Jennifer Esposito 4 4 4 Katrina Schmitt 4 4 4 Ling-Yu Chan 4 4 4 Francesca Sherwood 4 4 4 Maria Henderson 4 4 4 Jimmy Kimmel 4 4 4 Faculty of Chemistry, California South University, 14731 Comet St. Irvine, CA 92604, USA In the current research, annealing effects on the interband transition and optical constants of Ruthenium (IV) Oxide (RuO?) and Ruthenium (VIII) Oxide (RuO4) nano thin films in cancer cells, tissues and tumors under synchrotron and synchrocyclotron radiations is investigated. The calculation of thickness and optical constants of Ruthenium (IV) Oxide (RuO?) and Ruthenium (VIII) Oxide (RuO4) annealing effects on the interband transition and optical constants of Ruthenium (IV) Oxide (RuO?) and Ruthenium (VIII) Oxide (RuO4) nano thin films in cancer cells, tissues and tumors under synchrotron and synchrocyclotron radiations produced using sol-gel method over glassy medium through a single reflection spectrum is presented. To obtain an appropriate fit for reflection spectrum, the classic Drude-Lorentz model for parametric di-electric function is used. The best fitting parameters are determined to simulate the reflection spectrum using Lovenberg-Marquardt optimization method. The simulated reflectivity from the derived optical constants and thickness are in good agreement with experimental results. http://pubs.sciepub.com/materials/9/1/1/materials-9-1-1.pdf annealing Interband Transition Optical Constants Ruthenium (IV) Oxide (RuO?) and Ruthenium (VIII) Oxide (RuO₄) nano thin films cancer cells tissues and tumors synchrotron and synchrocyclotron radiations