Materials
One of our competencies is the discovery of new material compositions and structures and the development of cost-effective production technologies for them. Our materials research covers semiconductor and scintillator bulk single crystals, ceramics, thick films for imaging plates, and composite detectors.
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Semiconductors
Our semiconductor research portfolio includes CdTe, CdZnTe, MAPbI3, MAPbBr3, CsPbBr3, FAMACs, TlBr, and LiInSe2. These materials are purified by proprietary methods before crystal growth, and single crystal boules in the range of 2-4 inches in diameter are produced by a variety of melt and solution growth techniques. High performance radiation detectors are fabricated from the grown crystals.
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Scintillators
Our scintillator research portfolio includes a variety of halides and oxide crystals with the goal of achieving high energy resolution, fast decay rate, and extremely high radiation hardness. Our overarching goal is to produce these detectors in very large volumes and at low production costs. The compositions under development include materials for gamma-only and gamma-neutron dual, and fast neutron detection.
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Composites
Significant performance enhancement and cost efficiency can be obtained by composite detectors consisting of complementary materials. Examples would include composites consisting of a gamma-only fast plastic with embedded high-energy resolution dual gamma-neutron inorganic crystal such as CLLB. These composites can be fabricated in arbitrarily large sizes, much bigger than inorganic single crystals can be produced while achieving the energy resolution of the inorganic crystals.
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Ceramics and Glasses
Our research is on ceramic and glass scintillators which are otherwise (a) have too high a melting point temperature for conventional growth systems, (b) hard to grow from the melt due to stoichiometry control issues, (c) take too long to produce in single crystal form, and (d) contains an organic component. Our research is focused on novel compositions, low production cost, high spatial resolution, and large volumes.
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Imaging plates
Our patent pending high spatial resolution low-cost imaging plate technology involves crystalline scintillators incorporated inside a microcapillary matrix. The plates can be optimized based on the radiation type (such as X-rays or neutrons) and applications, thereby providing a customized solution for highly efficient radiography detectors. Spatial resolutions better than Si-based detectors have been demonstrated using these imaging plates with the added advantage of usability at higher radiation energies.