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Evaluation of a Fluorochlorozirconate Glass‐Ceramic Storage Phosphor Plate for Gamma‐Ray Computed Radiography
Author(s) -
Leonard Russell L.,
Gray Sharon K.,
Alvarez Carlos J.,
Moses Alex K.,
Arrowood Lloyd F.,
Lubinsky Anthony R.,
PetfordLong Amanda K.,
Johnson Jacqueline A.
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13664
Subject(s) - materials science , orthorhombic crystal system , phosphor , barium , photostimulated luminescence , ceramic , analytical chemistry (journal) , optics , composite material , diffraction , chemistry , optoelectronics , metallurgy , physics , chromatography
A fluorochlorozirconate ( FCZ ) glass‐ceramic containing orthorhombic barium chloride crystals doped with divalent europium was evaluated for use as a storage phosphor in gamma‐ray imaging. X‐ray diffraction and phosphorimetry of the glass‐ceramic sample showed the presence of a significant amount of orthorhombic barium chloride crystals in the glass matrix. Transmission electron microscopy and scanning electron microscopy were used to identify crystal size, structure, and morphology. The size of the orthorhombic barium chloride crystals in the FCZ glass matrix was very large, ~0.5–0.7 μm, which can limit image resolution. The FCZ glass‐ceramic sample was exposed to 1 MeV gamma rays to determine its photostimulated emission characteristics at high energies, which were found to be suitable for imaging applications. Test images were made at 2 MeV energies using gap and step wedge phantoms. Gaps as small as 101.6 μm in a 440 stainless steel phantom were imaged using the sample imaging plate. Analysis of an image created using a depleted uranium step wedge phantom showed that emission is proportional to incident energy at the sample and the estimated absorbed dose. The results showed that the sample imaging plate has potential for gamma‐ray‐computed radiography and dosimetry applications.