The present invention is directed to a scintillator array having an integrated
air gap. By integrating an air gap within the reflector, light collection efficiency
is improved while simultaneously lowering cross-talk between scintillators. That
is, implementing a reflector without chromium oxide (Cr2O3)
increases light reflectivity and an air gap lowers cross talk through the reflector.
To further improve the reflectivity, the base reflector material may be coated
with a low index material and a reflective material such as silver.