Investigation of the Charge Collection Efficiency of CdMnTe Radiation Detectors

Rafiei, R.; Boardman, D.; Sarbutt, A.; Prokopovich, Dale A.; Kim, K.; Reinhard, Mark I.; Bolotnikov, A. E.; James, R. B.

doi:10.1109/tns.2012.2190941

Cited by 10 publications

(9 citation statements)

References 31 publications

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“…High resistivity (10 9 − 10 10 Ωcm) single crystals of CMT were grown by the vertical Bridgman technique using a a e-mail: rxr103@gmail.com mixture of CdTe (6N) and MnTe [9]. In order to increase the purity of MnTe source material it was purified twice by the zone-refining method with molten Te.…”

Section: Crystals and Detector Fabricationmentioning

confidence: 99%

“…To obtain the average charge collection efficiency (CCE) across the CMT detectors, both alpha-particle spectroscopy [9] and transient current technique (TCT) [10] measurements were carried out. For these measurements the negative bias was applied to the circular detector (without guard ring) shown in Fig.…”

Section: Average Charge Collection Efficiency Measurements and Hecht mentioning

confidence: 99%

“…A very recent and promising candidate is cadmium manganese telluride (CMT) [3]. Its distinct advantages of good compositional homogeneity and a highly tunable band gap compared to CdZnTe have encouraged CMT detector developments in recent years, bringing large improvements in the performance of CMT as a high resistivity single crystal radiation detector [4][5][6][7][8][9][10]. This work describes the growth, fabrication and characterization of indium doped CMT radiation detectors with 5 % manganese concentration (1.59 eV band gap).…”

Section: Introductionmentioning

confidence: 99%

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Charge transport properties of CdMnTe radiation detectors

Rafiei

Boardman

Reinhard

et al. 2012

EPJ Web of Conferences

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Abstract. 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 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 µ n = (718 ± 55) cm 2 /Vs at room temperature.

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Section: Crystals and Detector Fabricationmentioning

confidence: 99%

Section: Average Charge Collection Efficiency Measurements and Hecht mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Charge transport properties of CdMnTe radiation detectors

Rafiei

Boardman

Reinhard

et al. 2012

EPJ Web of Conferences

Self Cite

View full text Add to dashboard Cite

show abstract

“…High resistivity (10 9 -10 10 f2cm) single crystals of CMT were grown by the vertical Bridgman technique using a mixture of CdTe (6N) and MnTe [13]. In order to increa e a e-mail: rxrll93@gmail.com the purity ofMnTe source material it was purified twice by the zone-refining method with molten Te.…”

Section: Crystals and Detector Fabricationmentioning

confidence: 99%

“…A very recent and promising candidate is cadmium manganese telluride (CMT) [3]. Its distinct advantages of good compositional homogeneity and a highly tunable band gap compared to CdZnTe have encouraged CMT detector developments in recent years, bringing large improvements in the performance of CMT a a high resistivity single cry tal radiation detector [4][5][6][7][8][9][10][11][12][13][14]. This work describes the growth, fabrication and characterization of indium doped CMT radiation detectors with 5 % manganese concentration (1.59 eV band gap [15]).…”

Section: Introductionmentioning

confidence: 99%