Say a hydrogen atom is accelerated so that both the nucleus and the bound electron gains kinetic energy exceeding it's electron binding energy, yes I know an hydrogen atom with 1 proton, 1 neutron and 1 electron is electrically neutral and therefore cannot be accelerated in an electric field. My question suppose it is possible for hydrogen atom to gain kinetic energy without absorbing photon, will the electron kicks itself out?
Imagine there is a suficiently extense and uniform gravitational field, so that each particle (electron, proton and neutron) can be accelerated with the same "force". Then consider the next two situations
You drop the atom.
You let the atom fixed and jump yourself down the gravitational field.
As far as the gravitational field remains uniform, I think that both situations are equivalent because each observer just sees the other accelerating and nothing more. In the second situation I would not expect the atom to change at all, thus neither in the first one.