So, during radiation safety training, much hullabaloo is made regarding how the high energy beta emitted by 32P produces Bremsstrahlung radiation when striking a high Z shielding material. As such, shielding material should be low Z, a la wood, plexiglass, etc.
But when it comes time for autoradiography, it seems like everyone just sticks it into a steel cassette, which has a high Z relative to all recommended materials. Is it just not such a big deal at this point? Shouldn't I be using something made of aluminum?