What is the minimum thickness of Aliminum foil to block alph

What is the minimum thickness of Aliminum foil to block alpha particlesemitted from Cf-252 source?

Solution

what is the minimum thickness of aluminum foil to block alpha particles emitted from Cf-252 source?

Answer::

Cf-252 discharges alpha particles (electrons) with around 546 keV vitality. A couple layers of overwhelming obligation family unit aluminum foil around 1 mm thick will stop and assimilate practically all these alpha particles.

Remember that, due to quantum mechanics, it is hypothetically difficult to stop every one of the particles regardless of what the thickness. Be that as it may, what truly matters is sufficiently halting of them so the radiation screen perusing is no higher than foundation radiation. This is ordinarily called the ALAR, or As Low As Reasonable, level of radiation spillage from your Cf-252 source