Abstract
In this paper the topic will be how mathematical Dirac equation representations can work out in fusion physics. The Dirac equation under study represents a neutron outside the nucleus but in an external magnetic field. We claim such a description is refering to a real neutron, i.e. we are allowed to employ such a representation here. With a new approach to the computation of the vector wave function solution, it is possible to obtain a sinusoidal time f luctuation in the neutron probability density. This sinusoidal form is applied in neutron- proton fusion.