Patent Number: 
Section: claims

1. A scintillator single crystal expressed by(PrxLu1−x)3Al5O12 where 0.002≦x≦0.02; andthe scintillator single crystal emits fluorescence having a wavelength of 200 to 350 nm when excited by gamma ray and having a decay time at room temperature of 1 to 50 nsec, andwherein the scintillator single crystal is a crystal formed by Czochralski method. 2. The scintillator single crystal according to claim 1, wherein the scintillator single crystal has an emission peak at a wavelength of 200 to 350 nm. 3. The scintillator single crystal according to claim 1, wherein the scintillator single crystal has an emission peak at a wavelength of about 300 nm. 4. The scintillator single crystal according to claim 1,wherein a fluorescence decay time of the scintillator single crystal is shorter than 20 nsec. 5. The scintillator single crystal according to claim 1,wherein the scintillator single crystal is expressed by (PrxLu1−x)3Al5O12 where 0.002≦x≦0.003. 6. A method of manufacturing the scintillator single crystal of claim 1, comprising charging Pr into a molten liquid expressed by (PrxLu1−x)3Al5O12 where 0.002≦x≦0.02, to an amount 5 to 15 times as much as a target amount of incorporation of Pr, and allowing said single crystal to grow by the micro-pulling-down process, using a molybdenum (Mo) crucible, or an iridium (Ir) crucible, or a crucible composed of an alloy of Ir and rhenium (Re). 7. A radiation detector having a scintillator composed of the scintillator single crystal according to claim 1, and configured as having a radiation detection unit detecting radioactive ray, and as being combined therewith a light receiving unit receiving fluorescence output as a result of detection of radioactive ray by said radiation detection unit. 8. A radiation inspection apparatus comprising the radiation detector according to claim 7. 9. The radiation inspection apparatus according to claim 8, being a positron emission tomography (PET) apparatus adoptable to a medical image processing apparatus. 10. The radiation inspection apparatus adoptable to a medical image processing apparatus according to claim 9,wherein said PET is two-dimensional PET, three-dimensional PET, time-of-flight-type (TOF-type) PET, depth-of-interaction-type (DOI-type) PET, or combinations thereof. 11. The radiation inspection apparatus according to claim 10, wherein said radiation inspection apparatus adoptable to said medical image processing apparatus is any one of stand-alone apparatus, magnetic resonance imaging apparatus (MRI), computed tomography apparatus (CT) and single photon computed tomography (SPECT), or combination thereof. 12. A radiation inspection apparatus adoptable to non-destructive inspection having the radiation detector according to claim 7, being either one of X-ray computed tomography apparatus (CT) and radiographic apparatus for radioactive ray transmission inspection, or combination thereof.