Growth, fabrication and characterization of indium-doped cadmium manganese telluride (CdMnTe) radiation detectors have been described. Alpha-particle spectroscopy measurements and time resolved current transient measurements have yielded an average charge collection efficiency approaching 100 %. Spatially resolved charge collection efficiency maps have been produced for a range of detector bias voltages. Inhomo-geneities in the charge transport of the CdMnTe crystals have been associated with chains of tellurium inclusions within the detector bulk. Further, it has been shown that the role of tellurium inclusions in degrading charge collection is reduced with increasing values of bias voltage. The electron drift velocity was calculated from the rise time distribution of the preamplifier output pulses at each measured bias. From the dependence of drift velocity on applied electric field the electron mobility was found to be μn = (718 ± 55) cm2/Vs at room temperature.
|Journal||EPJ Web of Conferences|
|Publication status||Published - 2012|
|Event||1st Heavy Ion Accelerator Symposium on Fundamental and Applied Science, HIAS 2012 - Canberra, ACT, Australia|
Duration: 2012 Apr 11 → 2012 Apr 13
ASJC Scopus subject areas
- Physics and Astronomy(all)