Effect of Te inclusions on internal electric field of CdMnTe gamma-ray detector

Oluseyi Stephen Babalola; Aleksey E. Bolotnikov; Stephen U. Egarievwe; Anwar M. Hossain; Arnold Burger; Ralph B. James

doi:10.1117/12.830214

11 September 2009 Effect of Te inclusions on internal electric field of CdMnTe gamma-ray detector

Oluseyi Stephen Babalola, Aleksey E. Bolotnikov, Stephen U. Egarievwe, Anwar M. Hossain, Arnold Burger, Ralph B. James

Proceedings Volume 7449, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI; 74491A (2009) https://doi.org/10.1117/12.830214
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

We studied two separate as-grown CdMnTe crystals by Infrared (IR) microscopy and Pockels effect imaging, and then developed an algorithm to analyze and visualize the electric field within the crystals' bulk. In one of the two crystals the size and distribution of inclusions within the bulk promised to be more favorable in terms of efficiency as a detector crystal. However, the Te inclusions were arranged in characteristic 'planes'. Pockels imaging revealed an accumulation of charges in the region of these planes. We demonstrated that the planes induced stress within the bulk of the crystal that accumulated charges, thereby causing non-uniformity of the internal electric field and degrading the detector's performance.

Citation Download Citation

Oluseyi Stephen Babalola, Aleksey E. Bolotnikov, Stephen U. Egarievwe, Anwar M. Hossain, Arnold Burger, and Ralph B. James "Effect of Te inclusions on internal electric field of CdMnTe gamma-ray detector", Proc. SPIE 7449, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI, 74491A (11 September 2009); https://doi.org/10.1117/12.830214

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