What results do you expect if α-particle scattering . . .

Question : What results do you expect if α-particle scattering experiment is repeated using a thin sheet of hydrogen in place of a gold foil? Explain. (Hydrogen is a solid at temperature below 14K)

Doubt by Aishwarya

Solution : 

We know, α-particle are basically helium nuclei so they will have a mass of around 4 amu while the mass of hydrogen atom is just 1 amu. So If we repeat the α-particle scattering experiment using a thin sheet of solid hydrogen sheet then almost all of the particles will go straight without any small or large angle deflections because mass of striking particle will be large as compared to target particle.