We observed an increase in light yield by a factor of 1.81±0.04 at a dopant concentration of 10 ppm ,
We determine a lower limit on the attenuation length of 3 m at a concentration of 10 ppm .
We observed an increase in light yield by a factor of 1.81±0.04 at a dopant concentration of 10 ppm , consistent with a Geant4 prediction of 1.83±0.02 .
We determine a lower limit on the attenuation length of 3 m at a concentration of 10 ppm .