Author/Authors :
Alessandrello، نويسنده , , A. and Brofferio، نويسنده , , C. and Cremonesi، نويسنده , , O. and Fiorini، نويسنده , , E. and Giuliani، نويسنده , , A. and Nucciotti، نويسنده , , A. Massi Pavan a، نويسنده , , M. De Pirro، نويسنده , , S. and Pessina، نويسنده , , G. and Parmeggiano، نويسنده , , S. and Previtali، نويسنده , , E. and Vanzini، نويسنده , , M. and Zanotti، نويسنده , , L. and Coccia، نويسنده , , E. and Fafone، نويسنده , , V. and Bu، نويسنده ,
Abstract :
A massive bolometer with a 760 g TeO2 crystal as energy absorber, the largest employed underground, has been realized and operated in the Gran Sasso Underground Laboratory for γ- and α-ray spectroscopy. A new system of mechanical suspensions was implemented to reduce vibration and thermal noise, and special care was put to the read-out electronics. As a consequence the FWHM resolution for high-energy γ-rays became comparable to that of Germanium diodes. The 4.2 keV average FWHM resolution for the 5407 keV line is the best ever obtained for α particles with any type of detector.
