Does aluminum foil block nuclear radiation?

Does aluminum foil block nuclear radiation? All types of radiation from nuclear decay can be stopped by aluminium if it is thick enough. Personal experience; at least 30 cm from Sr 90 isotope (beta source). Alpha particles can be absorbed by a thin sheet of paper or by a few centimetres of air.

All types of radiation from nuclear decay can be stopped by aluminium if it is thick enough. Personal experience; at least 30 cm from Sr 90 isotope (beta source). Alpha particles can be absorbed by a thin sheet of paper or by a few centimetres of air.