Atoms and Nuclei

A parent radioactive nucleus A (decay constant lamda_(A)) converts into a radio-active nucleus B of decay constant lamda_(b) , initially, number of atoms of B is zero At any time N_(a),N_(b) are number of atoms of nuclei A and B respectively then maximum velue of N_(b) .

For atomic nuclei, the binding energy per nucleon

Show that atomic nuclei of different elements have different sizes.

r_(1) and r_(2) are the radii of atomic nuclei of mass numbers 64 and 27 repsectively. The ratio (r_(1)//r_(2)) is