In which radiation atomic number and mass number are not affected?

In $\gamma$-radiation, no change occurs in mass number and atomic number because its rest mass is zero and it is a neutral for electric and magnetic field. In $\alpha$-radiation, atomic number is decreased by 2 units and atomic mass is decreased by 4 units. In $\beta$-radiation, no change occurs in atomic mass but atomic number increases by 1 unit.