| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10715982 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2009 | 7 Pages |
Abstract
In order to optimize sapphire as a cryogenic scintillation-phonon detector for dark matter, Al2O3:Ti crystals with different concentrations of doping have been studied using continuous X-ray excitation in the 30-300Â K temperature range. Light yields vary by 20% for Ti concentrations between 10 and 1000Â ppm at room temperature; they roughly double as the crystals are cooled from room temperature to 45Â K. From the analysis of the change in the X-ray luminescence spectra of Al2O3 with the concentration of Ti, it is concluded that the well-known blue emission of Ti-doped Al2O3 is due to the radiative decay of F-centers. Recommendations are given for improving the performance of Al2O3 scintillators.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
M. Luca, N. Coron, C. Dujardin, H. Kraus, V.B. Mikhailik, M.-A. Verdier, P.C.F. Di Stefano,