Investigations of Cadmium Manganese Telluride Crystals for Room-Temperature Radiation Detection Page: 3 of 17
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INVESTIGATIONS OF CADMIUM MANGANESE TELLURIDE CRYSTALS FOR
ROOM-TEMPERATURE RADIATION DETECTION
G. YANG'4, A. E. BOLOTNIKOV', G. S. CAMARDA', Y. CUIP, A. HOSSAIN', K.KIM',
V. CARCELEN' , R. GUL'3, and R. B. JAMES'
1. Brookhaven National Laboratory, Upton, NY 11973, USA.
2. Laboratorio de Crecimiento de Cristales, Dpto. Fisica de Materiales, Facultad de Ciencias,
University Autonoma de Madrid, 28049 Madrid, Spain.
3. Idaho State University, Pocatello, ID 83209, USA.
4. email: firstname.lastname@example.org
Cadmium manganese telluride (CMT) has high potential as a material for room-temperature
nuclear-radiation detectors. We investigated indium-doped CMT crystals taken from the stable
growth region of the ingot, and compared its characteristics with that from the last-to-freeze
region. We employed different techniques, including synchrotron white-beam X-ray topography
(SWBXT), current-voltage (I-V) measurements, and low-temperature photoluminescence spectra,
and we also assessed their responses as detectors to irradiation exposure. The crystal from the
stable growth region proved superior to that from the last-to-freeze region; it is a single-grain
crystal, free of twins, and displayed a resistivity higher by two orders-of-magnitude. The
segregation of indium dopant in the ingot might be responsible for its better resistivity.
Furthermore, we recorded a good response in the detector fabricated from the crystal taken from
the stable growth region; its ( i)e value was 2.6x10- cm2/V, which is acceptable for thin
detectors, including for applications in medicine.
Keywords: CMT, synchrotron white-beam X-ray topography, photoluminescence spectra,
detector response, twins
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Yang, G.; Bolotnikov, A.; Camarda, G.; Cui, Y.; Hossain, A.; Kim, K. et al. Investigations of Cadmium Manganese Telluride Crystals for Room-Temperature Radiation Detection, article, October 6, 2009; United States. (digital.library.unt.edu/ark:/67531/metadc837402/m1/3/: accessed January 17, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.