Implementation of xenon capture gammas in Fluka for TRD background calculations

The energy and intensity of gammas produced by thermal neutron capture in xenon must be known in order to simulate the background in the ALICE TRD detector. Because such information is missing from the available evaluated nuclear data files, it has been necessary to reconstruct it by comparing the few existing experimental data with a NNDC database of adopted energy levels. An algorithm based on the resulting data has been implemented in the FLUKA code to simulate the full gamma cascade in all stable xenon isotopes. (author)