[" A neutron moving with some kinetic energy collides head-on with a "],[" stationary helium ion "(He^(+))" in its ground state.The minimum kinetic "],[" energy of neutron so that the collision can be inelastic,is "]

An electron of kinetic energy K collides elastically with a stationary hydrogen atom in the ground state. Then,

A neutron moving with a certain kinetic energy collides head on with an atom of mass number A.The fractional kinetic energy retained by it is

A neutron moving with a certain kinetic energy collidies head on with an atom of mass number A. The fractional kinetic energy retained by it is

A free hydrogen atom in its ground state is at rest. A neutron having kinetic energy k_(0) collides head one with the atom. Assume that mass of both neutron and the atom is same. (a) Find minimum value of k_(0) so that this collision can be inelastic. (b) If k_(0) = 25 eV , find the kinetic energy of neutron after collision if its excites the hydrogen atom to its second excited state. Take ionization energy of hydrogen atom in ground state to be 13.6 eV .