2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/81305Detector DEVIS is TPC in the magnetic field. It is dedicated to the investigation of the double-beta decay of Xe. Setup sensitivity was estimated in the series of measurements with Xe with natural isotopes composition. Detector allows measuring two-neutrino double-beta decay of $^{136}$Xe with half-life less than $3 \cdot 10^{20}$ years.14 pages, 8 figuresNuclear Experimenttext