The range of beta particles of energy greater than 0.8 MeV is given roughly by the
relation
When E is the energy of beta particles. Find what thickness of aluminium sheet (density
2,700 kg/m3) is enough to stop the beta particle that is generated from the natural decay of
P-32. The atomic mass of P-32 is 31.973908 amu, the atomic mass of S-32 is 31.972071
and the atomic mass of an electron can be found in the lecture