Radiation detector performance of CdTe single crystals grown by the conventional vertical Bridgman technique

Csaba Szeles; Elgin E. Eissler; Danny J. Reese; Scott E. Cameron

doi:10.1117/12.366626

19 October 1999 Radiation detector performance of CdTe single crystals grown by the conventional vertical Bridgman technique

Csaba Szeles, Elgin E. Eissler, Danny J. Reese, Scott E. Cameron

Author Affiliations +

Proceedings Volume 3768, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics; (1999) https://doi.org/10.1117/12.366626
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The charge transport properties and radiation detector performance of semi-insulating CdTe single crystal grown by the conventional vertical Bridgman technique in this paper. The measured room-temperature electrical resistivity of the crystals is below the theoretical maximum allowed by the band gap of CdTe indicating incomplete electrical compensation of the material. The crystals show excellent spectroscopic performance in the 15 keV - 662 keV energy range, with reduced low-energy tailing in the photopeaks. The energy resolution of the best detector was 2.7 keV full width half maximum (FWHM) at 59.5 keV, 4.5 keV FWHM at 122 keV, and 20.1 keV FWHM at 662 keV. This improved performance is attributed to the improved hole transport over the typical HPB CdZnTe. The measured mobility-lifetime product of holes, (mu) (tau) _h approximately equals 2.3 X 10^-4 cm²/V, is significantly higher than that typical for HPB CdZnTe crystals. The measured electron (mu) (tau) _e approximately equals 1.6 X 10^-3 cm²/V of these CdTe crystals suggest somewhat poorer electron transport than in a spectroscopic grade HPB material.

Citation Download Citation

Csaba Szeles, Elgin E. Eissler, Danny J. Reese, and Scott E. Cameron "Radiation detector performance of CdTe single crystals grown by the conventional vertical Bridgman technique", Proc. SPIE 3768, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics, (19 October 1999); https://doi.org/10.1117/12.366626

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available