A measurement of the angular distribution of the diffuse optical transmittance of etched nuclear tracks in CR-39

This paper presents a device to measure the angular distribution of the diffuse optical transmittance produced by etched nuclear tracks in polyallyl diglycol carbonate (PADC) detector. The device makes use of a stepper motor to move an array of four photodetectors around the sample in 1.8° steps. The integrated transmitted light was observed to increase monotonically with the etched track density in a range from zero to 2.8 × 105 cm−2, using a neutron Am-Be source.