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Gamma Ray Detection with Cd0.9Zn0.1Te Based Detectors Grown Using a Te Solvent Method

  • Sandeep K. Chaudhuri (a1), Kelvin J. Zavalla (a1), Ramesh M. Krishna (a1) and Krishna C. Mandal (a1)


Cd0.9Zn0.1Te (CZT) single crystal has been grown using a tellurium solvent method. Two CZT crystals have been chosen from two different locations of the grown ingot. The two crystals were characterized using infrared transmission (IR) imaging and radiation detectors in planar geometry were fabricated on them. Current-voltage characteristics (I-V) revealed a resistivity of ∼8.6×1010 Ω−cm for detector A (6.9×6.9×4.8 mm3) and 6.7×1010 Ω−cm for detector B (11.5×11.7×2.6 mm3). IR imaging showed a lesser concentration of Te inclusions/precipitates in detector A. The transport properties viz., electron drift-mobility and electron mobility-lifetime product were measured using alpha spectroscopy in these detectors in a planar configuration. Detector A showed better charge transport properties compared to detector B. The superior transport properties of crystal A were reflected in the spectroscopic properties of the detectors. Gamma pulse height measurements using a 241Am isotope revealed an energy resolution of ∼5 % for detector A and ∼7 % for detector B. A digital spectrometer and a biparametric correction scheme was incorporated to recover the pulse height spectrum of high energy gamma rays (137Cs source) from the effect of poor hole movement.


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1. Schlesinger, T. E., Toney, J. E., Yoon, H., Lee, E. Y., Brunett, B. A., Franks, L., and James, R. B., “Cadmium zinc telluride and its use as a nuclear radiation detector material,” Mater. Sci. and Eng. R, vol. 32, pp. 103189, 2001.
2. Bolotnikov, A. E., Butcher, J., Camarda, G. S., Cui, Y., De Geronimo, G., Fried, J., Gul, R., Fochuk, P.M., Hamade, M., Hossain, A., Kim, K. H., Kopach, O. V., Petryk, M., Vernon, E., Yang, G., and James, R. B., “Array of virtual Frisch-grid CZT detectors with common cathode readout for correcting charge signals and rejection of incomplete charge-collection events,” IEEE Trans. Nucl. Sci. vol. 59, no. 6, pp. 15441551, 2012.
3. Mandal, K. C., Kang, S. H., Choi, M., Bello, J., Zheng, L., Zhang, H., Groza, M., Roy, U. N., Burger, A., Holcomb, D. E., Wright, G. W., and Williams, J. A., “Simulation, modeling, and crystal growth of Cd0.9Zn0.1Te for nuclear spectrometers,” J. Electron. Mater. vol. 35, no. 6, pp. 12511256, 2006.
4. Krishna, R. M., Hayes, T. C., Muzykov, P. G., and Mandal, K. C., “Low temperature crystal growth and characterization of Cd0.9Zn0.1Te for radiation detection applications,” Mater. Res. Soc. Symp. Proc., vol. 1341, pp. 3944, 2011.
5. Krishna, R. M., Chaudhuri, S. K., Zavalla, K. J., and Mandal, K. C., “Characterization of Cd0.9Zn0.1Te based virtual Frisch grid detectors for high energy gamma ray detection,” Nucl. Instrum. Meth. Phys. Res. A, vol. 701, pp. 208213, 2013.
6. Knoll, G. F., Radiation detection and measurement, 3rd ed., John Wiley and Sons, Inc.:New York, 2000, p. 480.
7. Chaudhuri, S. K., Lohstroh, A., Nakhostin, M., Sellin, P.J., “Digital pulse height correction in HgI2 γ-ray detectors,” J. Instrumentation, vol. 7, pp. T04002-1-13, 2012.
8. Carini, G. A., Bolotnikov, A. E., Camarda, G. S., Wright, G. W., James, R. B., and Li, L., “Effect of Te precipitates on the performance of CdZnTe detectors,” Appl. Phys. Lett., vol. 88, no. 14 pp. 143515143517, 2006.
9. Bolotnikov, A. E., Camarda, G. S., Carini, G. A., Cui, Y., Li, L., and James, R. B., “Cumulative effects of Te precipitates in CdZnTe radiation detectors,” Nucl. Instrum. Meth. A, vol. 571, no. 3, pp. 687698, 2007.
10. Crocco, J., Bensalah, H., Zheng, Q., Corregidor, V., Avles, E., Castaldini, A., Fraboni, B., Cavalcoli, D., Cavallini, A., Vela, O., and Dieguez, E., “Study of asymmetries of Cd(Zn)Te devices investigated using photo-induced current transient spectroscopy, Rutherford backscattering, surface photo-voltage spectroscopy, and gamma ray spectroscopies,” J. Appl. Phys., vol. 112, no. 7, pp. 074503–1-9, 2012.



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