Neutron background measurements in the DEVIS experiment

The neutron flux has been measured in the experimental area of the Institute for Theoretical and Experimental Physics in the course of the DEVIS tracking experiment aimed at searching for the double β decay of Xe, since events imitating double β decay may be produced in neutron interactions with the detector materials. Based on the results of measurements with a neutron source, the chemical composition of the materials used in the setup has been refined, and the accuracy of the Monte Carlo simulation of the setup has been checked. Additional sources of neutron background have been found, and their activity has been estimated.