Ponente
Dr.
Theopisti Dafni
(Universidad de Zaragoza)
Descripción
The “Neutrino Experiment with a Xenon TPC” (NEXT) is intended to investigate the neutrinoless double beta decay using a high-pressure xenon gas TPC filled with Xe enriched in 136Xe and therefore demands extremely low background levels. An extensive screening and material selection process is underway for several years to help in the design of the set-up and in the construction of the experiment background model. Determination of the material activity levels is based on gamma-ray spectroscopy using ultra-low background germanium detectors of the Radiopurity Service of the Laboratorio Subterráneo de Canfranc (Spain) and also on Glow Discharge Mass Spectrometry. Materials analyzed include: lead and copper to be used in the shielding; 316Ti stainless steel for the pressure vessel; different plastics for electroluminescence and high voltage components; capacitors, resistors, adhesives and materials for printed circuit boards to be used in the tracking readout plane; and photomultipliers, bases and related components for the energy readout plane. The latest results obtained will be shown, discussing their implications for the NEXT experiment.
Autores primarios
Dr.
Susana Cebrian
(Universidad de Zaragoza)
Dr.
Theopisti Dafni
(Universidad de Zaragoza)
