Charge transport properties of CdMnTe radiation detectors
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. Inhomogeneities 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 chargecollection is reduced with increasing values of bias voltage. The electron transit time was determined from time of flight measurements. From the dependence of drift velocity on applied electric field the electron mobility was found to be n = (718 55) cm2/Vs at room temperature.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1044754
- Report Number(s):
- BNL-98031-2012; NN2001000; TRN: US1203563
- Resource Relation:
- Related Information: Heavy Ion Accelerator Symposium; Canberra, Australia; 20120411 through 10120413
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
43 PARTICLE ACCELERATORS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CADMIUM
CHARGE COLLECTION
CHARGE TRANSPORT
EFFICIENCY
ELECTRIC FIELDS
ELECTRON MOBILITY
ELECTRONS
FABRICATION
HEAVY ION ACCELERATORS
MANGANESE TELLURIDES
RADIATION DETECTORS
SPECTROSCOPY
TELLURIUM
TRANSIENTS
VELOCITY
transport
properties
CdMnTe
radiation
detectors