Author/Authors :
Grassi، نويسنده , , Paula D. and Perillo، نويسنده , , E. and Gigante، نويسنده , , G. and De Cesare، نويسنده , , N. and Spadaccini، نويسنده , , G. and Vigilante، نويسنده , , M. and Dusi، نويسنده , , W. and Amann، نويسنده , , M. and Koebel، نويسنده , , J.M. and Siffert، نويسنده , , P.، نويسنده ,
Abstract :
Newly designed Hg12 linear arrays based on resistive charge division, obtained by depositing a Ge surface resistive layer (with typical interstrip resistances of ≈ 4 and 6 MΩ) between the read-out Pd strips, have been fabricated. These detectors, coupled with specially designed front-end electronics, have shown a high detection efficiency over a large active detection area and an energy resolution of 20% for X-ray energy Ex = 22 keV, estimated to become < 5% at Ex > 100 keV. Further, a spatial sensitivity of ≈ 10 μm and a spatial resolution of ≈ 100 μm have been obtained at 30 keV, by making use, for a fine spatial characterization of the devices, of a laser beam spot 50 μm in diameter with wavelength tuned to match the crystal band gap (582 nm). These devices could be successfully employed in basic research (for example Bragg X-ray spectrometry) and for radiological and high-energy (Ex > 100 keV) astrophysical applications.
