Gamma ray response of a 48 × 48 Ge PIN photodiode array with multiplexer readout

H. B. Barber, F. L. Augustine, H. H. Barrett, E. L. Dereniak, K. J. Matherson, D. L. Perry, J. E. Venzon, J. M. Woolfenden, E. T. Young

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

We are developing a new kind of gamma-ray imaging device that will have submillimeter spatial resolution and excellent energy resolution. The device is composed of a slab of semiconductor detector partitioned into an array of detector cells by photolithography with a monolithic circuit chip called a multiplexer (MUX) for readout. The application is for an ultra-high-resolution, modular SPECT system for functional brain imaging. In this paper, we describe preliminary results obtained with a Hughes 48 × 48 array of Ge PIN photodiodes with MUX readout originally developed as an infrared focal-plane-array detector. The device operates at cryogenic temperatures. We show that the device functions as an array of individual gamma-ray detectors and describe initial results for single pixel gamma-ray response, including linearity, quantum efficiency and energy resolution as a function of gamma-ray energy. A measured energy resolution of 1.5% FWHM is found for 99mTc 140 keV gamma rays. When used as an imaging detector, the spatial resolution of this device should be similar to the pixel spacing (125 μm).

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium & Medical Imaging Conference
PublisherPubl by IEEE
Pages1381-1385
Number of pages5
Editionpt 2
ISBN (Print)0780314875
StatePublished - Jan 1 1994
EventProceedings of the 1993 IEEE Nuclear Science Symposium & Medical Imaging Conference - San Francisco, CA, USA
Duration: Oct 30 1993Nov 6 1993

Publication series

NameIEEE Nuclear Science Symposium & Medical Imaging Conference
Numberpt 2

Other

OtherProceedings of the 1993 IEEE Nuclear Science Symposium & Medical Imaging Conference
CitySan Francisco, CA, USA
Period10/30/9311/6/93

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

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    Barber, H. B., Augustine, F. L., Barrett, H. H., Dereniak, E. L., Matherson, K. J., Perry, D. L., Venzon, J. E., Woolfenden, J. M., & Young, E. T. (1994). Gamma ray response of a 48 × 48 Ge PIN photodiode array with multiplexer readout. In IEEE Nuclear Science Symposium & Medical Imaging Conference (pt 2 ed., pp. 1381-1385). (IEEE Nuclear Science Symposium & Medical Imaging Conference; No. pt 2). Publ by IEEE.