Gas phase chemical reactions of fission products with ethylene using the gas jet technique

Gamma-ray spectroscopy can be used to identify short-lived fission products in chemical fractions obtained by gas phase transport and liquid–liquid extraction. Volatile compounds of selenium and bromine fission products of 235U were studied using a semi-automatic batch solvent extraction technique. The resulting gamma-ray spectra of the heptane and water phases were consistent with the nuclides of interest (84Se, 85Se, 86Se and 86Br, 87Br, 88Br), activation products, and neutron reactions with the Ge in the detectors. The procedure used to identify these peaks is reported.