Study of the isomeric ratio of fission product Xe produced in the photo-fission of Th and U induced by end-point bremsstrahlung energy of 13.5 MeV.

We determine the isomeric ratios of Xe in the photo-fission of Th and U induced by end-point bremsstrahlung energy of 13.5 MeV. The isomeric ratios were determined from the characteristic gamma ray activities of the isomeric and ground states of Xe. The induced gamma ray spectra of Xe were measured by a spectroscopic system, which consists of a HPGe detector connected to a PC based multichannel analyzer. In order to improve the accuracy of the experimental results, the method of inert gaseous flow was used to carry the fission product from the reaction camera to the collector. The isomeric ratios of Xe from the present work are the first time measurements. The present results were analyzed, discussed and compared with the similar data from literature to examine the role of excitation energy, energy separated in fission process and effect of reaction channels. [ABSTRACT FROM AUTHOR]