Effects of material improvement on CZT detectors

Muren Chu; S. Terterian; D. Ting; G. A. Carini; G. S. Camarda; A. E. Bolotnikov; R. B. James; D. Xu; Z. He

doi:10.1117/12.683980

30 August 2006 Effects of material improvement on CZT detectors

Muren Chu, S. Terterian, D. Ting, G. A. Carini, G. S. Camarda, A. E. Bolotnikov, R. B. James, D. Xu, Z. He

Proceedings Volume 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII; 631905 (2006) https://doi.org/10.1117/12.683980
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

CZT material quality improvement has been achieved by optimizing the crystal growth process. N-type conductivity has been measured on as-grown, undoped Cd_0.9Zn_0.1Te. Cd _0.85 Zn _0.15Te crystals have been grown for producing high resistivity CZT radiation detectors. The best FWHM of ⁵⁷Co 122KeV spectrum was measured to be 3.7% and (µτ)_e was 3x10^-3 cm²V^-1. The microscopic gamma ray response using a beam size of 10µm has been used to map the entire 4 mm x 4 mm detector. Several black spots indicating no signal responses were observed while all other areas showed an average of 65-70% collection efficiency. The black spots suggest that at those locations, the Te precipitates are larger than 10μm. Detailed microscopic infrared transmission measurement on the sample found that most Te precipitates have sizes of 4-6μm. Theoretical analysis of the results suggests that singly and doubly ionized TeCdVCd² might be the shallow and deep donors previously assigned to Te_Cd by us.

Citation Download Citation

Muren Chu, S. Terterian, D. Ting, G. A. Carini, G. S. Camarda, A. E. Bolotnikov, R. B. James, D. Xu, and Z. He "Effects of material improvement on CZT detectors", Proc. SPIE 6319, Hard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII, 631905 (30 August 2006); https://doi.org/10.1117/12.683980

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