Evaluation of production samples of the scintillators LaBr3:Ce andLaCl3:Ce

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We report on the evaluation of the performance of two recently developed scintillator materials, LaCl{sub 3}:Ce and LaBr{sub 3}:Ce, at the task of gamma ray spectroscopy. Their performance is compared to a standard scintillator used for gamma ray spectroscopy--a 25 mm diameter 25 mm tall cylinder of NaI:Tl. We measure the pulse height, energy resolution, and full-energy efficiency of production LaBr{sub 3}:Ce and LaCl{sub 3}:Ce scintillation crystals of different sizes and geometries for a variety of gamma-ray energies. Using production rather than specially selected crystals will establish whether immediate large-scale use is feasible. The crystal is excited by gamma rays ... continued below

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Choong, Woon-Seng; Derenzo, Stephen E. & Moses, William W. September 15, 2005.

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We report on the evaluation of the performance of two recently developed scintillator materials, LaCl{sub 3}:Ce and LaBr{sub 3}:Ce, at the task of gamma ray spectroscopy. Their performance is compared to a standard scintillator used for gamma ray spectroscopy--a 25 mm diameter 25 mm tall cylinder of NaI:Tl. We measure the pulse height, energy resolution, and full-energy efficiency of production LaBr{sub 3}:Ce and LaCl{sub 3}:Ce scintillation crystals of different sizes and geometries for a variety of gamma-ray energies. Using production rather than specially selected crystals will establish whether immediate large-scale use is feasible. The crystal is excited by gamma rays from one of six isotopic sources ({sup 125}I, {sup 241}Am, {sup 57}Co, {sup 22}Na, {sup 137}Cs, and {sup 60}Co) placed 15 cm away from the scintillator. Our measurements show that both LaCl{sub 3} and LaBr{sub 3} outperform NaI:Tl in almost all cases. They outperform NaI:Tl at all energies for the photopeak fraction and counting rate measurements, and for energy resolution at higher energies (above 200 keV for LaCl{sub 3} and 75 keV for LaBr{sub 3}). The performance of production crystals is excellent and these scintillators should be considered for immediate use in systems where stopping power and energy resolution are crucial.

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  • Scint2005: International Conference on InorganicScintillators and their Industrial Applications, Crimea, Ukraine,September 19-23, 2005

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  • Report No.: LBNL--62174
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 932682
  • Archival Resource Key: ark:/67531/metadc900753

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  • September 15, 2005

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  • Sept. 27, 2016, 1:39 a.m.

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  • Sept. 29, 2016, 2:35 p.m.

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Choong, Woon-Seng; Derenzo, Stephen E. & Moses, William W. Evaluation of production samples of the scintillators LaBr3:Ce andLaCl3:Ce, article, September 15, 2005; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc900753/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.