High efficiency CsI(Tl)/HgI2 gamma ray spectrometers

Y. J. Wang, B. E. Patt, J. S. Iwanczyk, Simon R Cherry, Y. Shao

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Monte Carlo simulations of the light collection for various tapered scintillator/photodiode configuration have been performed to find geometries that result in best light collection. From the simulation results, scintillators with the most favorable geometry, the conical frustrum, have been fabricated and evaluated. The response of a large conical frustum (top-2 inches, bottom-1 inches, 2 inches high) CsI(Tl) scintillator coupled with a 1 inches HgI2 PD is measured. The spectrum shows much higher detection efficiency than those from smaller scintillators, i.e., much higher peak-to-Compton ratio in the spectrum.

Original languageEnglish (US)
Pages (from-to)601-605
Number of pages5
JournalIEEE Transactions on Nuclear Science
Issue number4 pt 1
StatePublished - Aug 1995
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering


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