New virtual Frisch-grid CdZnTe detector design with sub-millimeter spatial resolution

Kisung Lee, Aleksey Bolotnikov, Seungbin Bae, Utpal Roy, Giuseppe Camarda, Matthew Petryk, Yonggang Cui, Anwar Hossain, Ge Yang, Vaclav Dedic, Kihyun Kim, Ralph B. James

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We evaluated the performance of a position-sensitive virtual Frisch-grid (VFG) CdZnTe detector, 6 mm x 6 mm x 15 mm, via sensing strips on its side surfaces.Once the signals were collected from the anode, and from four or eight strips attached to the detector's sides, we assessed the anode's energy spectra and derived histograms from the side electrodes to evaluate the feasibility of achieving sub-millimeter spatial resolution in the X-Y plane. Using a highly collimated 30-keV X-ray beam at the National Synchrotron Light Source, and applying corrections to the raw data, we determined the photon-interaction points by conventional Anger logic and via a more sophisticated statistics-based positioning (SBP) algorithm.With the VFG detector's current configuration, we achieved a resolution below 1 mm, even for low-energy X-rays.

Original languageEnglish
Article number2348572
Pages (from-to)2567-2572
Number of pages6
JournalIEEE Transactions on Nuclear Science
Issue number5
Publication statusPublished - 2014 Oct 1

Bibliographical note

Publisher Copyright:
© 2014 IEEE.


  • CdZnTe
  • Frisch-grid
  • Position-sensitive
  • Positioning algorithm
  • Radiation detector

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering


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