Theoretical calculations of production cross-sections for the 201 Pb, 111 In 18 F and 11 C radioisotopes at proton induced reactions.

Production of radioisotopes that used in medical diagnosis and treatment are mostly based on the nuclear reactions. The cross-section data are important to understand nuclear reaction mechanisms. In this study TALYS 1.8 code has been used to calculate production cross-sections of 201 Pb, 111 In, 18 F and 11 C radioisotopes at proton induced reactions. Constant Temperature Fermi Gas Model (CTFGM), Back Shifted Fermi Gas Model (BSFGM) and Generalised Super Fluid Model (GSM) have been employed as a level density models for computations. Relative variance calculations have been carried out to determine the best level density model. In addition to cross-section calculations, total activities of radioisotopes have been presented. Production cross-section calculation results have been compared with experimental data taken from Experimental Nuclear Reaction Database (EXFOR).