if you want to kill your battery, yes, it does make a very inefficient (small area) ionizing radiation detector. Keep in mind that the size of the sensor is O(1

if you want to kill your battery, yes, it does make a very inefficient (small area) ionizing radiation detector. Keep in mind that the size of the sensor is O(1 cm^2). It would be easier if the phone had a shutter. Look up Crayfis or DECO.