a 9. It is claimed that the dead layer of your skin is thick enough to a 5-MeV alpha particle. (a) Find a value for the dead layer thickness, and use the NIST tables to either prove or disprove this claim. State what NIST material you're using to find alpha particle ranges. (b) What is the range, in cm, of a 5-MeV alpha in air (use the NIST tables to find that value)? a 9. It is claimed that the dead layer of your skin is thick enough to a 5-MeV alpha particle. (a) Find a value for the dead layer thickness, and use the NIST tables to either prove or disprove this claim. State what NIST material you're using to find alpha particle ranges. (b) What is the range, in cm, of a 5-MeV alpha in air (use the NIST tables to find that value)