Author/Authors :
Vanzini، نويسنده , , M. and Alessandrello، نويسنده , , A. and Brofferio، نويسنده , , C. and Bucci، نويسنده , , C. and Coccia، نويسنده , , E. and Cremonesi، نويسنده , , O. and Fafone، نويسنده , , V. and Fiorini، نويسنده , , E. and Giuliani، نويسنده , , A. and Nucciotti، نويسنده , , A. Massi Pavan a، نويسنده , , M. and Peruzzi، نويسنده , , A. C. Pessina، نويسنده , , G. and Pirro، نويسنده , , S. and Pobes، نويسنده , , C. and Parmeggiano، نويسنده ,
Abstract :
Since many years the Milano–Gran Sasso collaboration is developing large mass calorimeters for Double Beta Decay and Dark Matter searches, employing TeO2 crystals as absorber elements. Recently, we have focused our attention on the improvement of the detector resolution: an efficient dumping suspension and the implementation of a new cold electronics device, have strongly suppressed the main sources of noise. The increase in S/N ratio has been of almost an order of magnitude and the resolution achieved is competitive with that of Ge diodes for γ-rays detection, while a FWHM of 3.2±0.3 keV has been obtained for 5.4 MeV alpha particles, the best result with any kind of detector.
