Optimization of array design for TIBr imaging detectors

Roland H. den Hartog; Alan Owens; Alex G. Kozorezov; Marcos Bavdaz; Anthony J. Peacock; Vladimir Gostilo; I. Lisjutin; Sergey Zatoloka

doi:10.1117/12.461574

11 March 2003 Optimization of array design for TIBr imaging detectors

Roland H. den Hartog, Alan Owens, Alex G. Kozorezov, Marcos Bavdaz, Anthony J. Peacock, Vladimir Gostilo, I. Lisjutin, Sergey Zatoloka

Author Affiliations +

Proceedings Volume 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy; (2003) https://doi.org/10.1117/12.461574
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

Thallium bromide (TlBr) has attracted attention as an exceptional radiation detector material. Due to its high atomic number (81 for Tl, 35 for Br) it has excellent stopping power for hard X-ray and gamma rays and due to its high bandgap (2.7 eV) its operation requires no or only modest cooling. Promising energy resolutions have been demonstrated with detectors fabricated from high-purity samples (3.3 keV for 60 keV photons). These properties make TlBr the material of choice for hard X-ray imaging spectrometers in applications where small weight and/or size is important (e.g. space astrophysics and nuclear medicine). The charge response and spectroscopic performance of a semiconductor imaging array depend not only on material properties but on the pixel properties as well. It has been demonstrated, for instance, that the ratio between pixel size and thickness of the detector is an important factor for the charge response. This is known as the small-pixel or near-field effect. In this paper we investigate the optimization of TlBr pixel properties in a broader context, taking into account material properties (electron and hole mobility, diffusion and trapping), fabrication details and the specific energy range of application, with a view to optimizing both the response and energy resolution.

Citation Download Citation

Roland H. den Hartog, Alan Owens, Alex G. Kozorezov, Marcos Bavdaz, Anthony J. Peacock, Vladimir Gostilo, I. Lisjutin, and Sergey Zatoloka "Optimization of array design for TIBr imaging detectors", Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); https://doi.org/10.1117/12.461574

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