High transmittance single crystal YAP scintillators
AssigneeCrytur
InventorsJan Kubat, Jan Polak, Martin Klejch, Tomas Marek
Life of this patent
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Abstract
A single crystal yttrium aluminum perovskite scintillator has a minimum thickness of at least 5 mm and a transmittance of at least 50% at a wavelength of 370 nm. A method for fabricating the yttrium aluminum perovskite scintillator includes acquiring a yttrium aluminum perovskite single crystal boule, annealing the yttrium aluminum perovskite single crystal boule in an oxygen containing environment to obtain a partially annealed crystal, and annealing the partially annealed crystal in an inert environment or a reducing environment to obtain the yttrium aluminum perovskite single crystal scintillator.
Claims16
A yttrium aluminum perovskite scintillator comprising a yttrium aluminum perovskite single crystal having a minimum thickness of at least 5 mm and a transmittance of at least 50% at a wavelength of 370 nm.
A downhole nuclear logging tool comprising:
- a logging tool body;
- a neutron generator deployed in the tool body;
- and
- a gamma ray detector deployed in the tool body, the gamma ray detector configured to detect incoming gamma rays and including a yttrium aluminum perovskite single crystal scintillator having a minimum thickness of at least 5 mm and a transmittance of at least 50% at a wavelength of 370 nm.
A method for making nuclear logging measurements, the method comprising:
- (a) deploying a nuclear logging tool in a subterranean formation, the nuclear logging tool including (i) a neutron generator and (ii) a gamma ray detector, the gamma ray detector including a yttrium aluminum perovskite single crystal scintillator having a minimum thickness of at least 5 mm and a transmittance of at least 50% at a wavelength of 370 nm;
- (b) causing the neutron generator to emit neutrons into the subterranean formation;
- and
- (c) causing the gamma ray detector to detect gamma rays resulting from an interaction between the neutrons emitted in (b) and the subterranean formation.
Dependencies are inferred from the claim text.