High speed growth of SrI2 scintillator crystals by the EFG process

G. Calvert; C. Guguschev; A. Burger; M. Groza; Jeffrey J Derby; R. S. Feigelson

doi:10.1016/j.jcrysgro.2016.10.024

High speed growth of SrI₂ scintillator crystals by the EFG process

G. Calvert, C. Guguschev, A. Burger, M. Groza, Jeffrey J Derby, R. S. Feigelson

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Strontium iodide (SrI₂), an important new scintillator crystal having a high light yield and excellent energy resolution, was grown for the first time by the edge-defined film-fed (EFG) growth method. Using high purity starting materials and floating dies made of graphite, fused quartz or AlN, large cylindrical, planar or square cross-section single crystals (12–15 mm across and >7 cm long) were produced at growth rates up to 15 mm/h, significantly faster than the current Bridgman growth technology. Details on the equipment used to grow this deliquescent material and on its growth behavior are given along with some discussion of crystalline quality.

Original language	English (US)
Pages (from-to)	143-151
Number of pages	9
Journal	Journal of Crystal Growth
Volume	455
DOIs	https://doi.org/10.1016/j.jcrysgro.2016.10.024
State	Published - Dec 1 2016

Bibliographical note

Funding Information:
This work was supported by the U.S. Department of Homeland Security under HSHQDC-11-C-00094. The content does not necessarily reflect the position or policy of the United States Government, and no official endorsement should be inferred. We would also thank Roger Route and Andrew Yeckel for useful discussions, Arturas Vailionis for help with X-ray analysis and Prof Chuck Melcher, Stacy Swider and Stephanie Lam for performing some scintillator property measurements on some of our crystals. The Fisk authors acknowledge the support provided by the National Science Foundation under Grant # HRD-1547757 (CREST-BioSS Center).

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

A1. Purification
A2. Edge defined film fed growth
B1.Halides
B2. Scintillator materials

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10.1016/j.jcrysgro.2016.10.024

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abstract = "Strontium iodide (SrI2), an important new scintillator crystal having a high light yield and excellent energy resolution, was grown for the first time by the edge-defined film-fed (EFG) growth method. Using high purity starting materials and floating dies made of graphite, fused quartz or AlN, large cylindrical, planar or square cross-section single crystals (12–15 mm across and >7 cm long) were produced at growth rates up to 15 mm/h, significantly faster than the current Bridgman growth technology. Details on the equipment used to grow this deliquescent material and on its growth behavior are given along with some discussion of crystalline quality.",

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