Deuteron is a bound state of a neutron and a proton with a binding energy `B=2.2MeV. A gamma`-ray of energy E is aimed at a deuteron nucleus to try to breack it into a (neutron +proton) such that the n and p move in the direction of the incident `gamma`-rays. If E=B, show that this can not happen. Hence, calculate how much bigger than B must E be for such a process to happen.