Scattering rate

A formula may be derived mathematically for the rate of scattering when a beam of electrons passes through a material. A formula may be derived mathematically for the rate of scattering when a beam of electrons passes through a material. Define the unperturbed Hamiltonian by H 0 {displaystyle H_{0}} , the time dependent perturbing Hamiltonian by H 1 {displaystyle H_{1}} and total Hamiltonian by H {displaystyle H} .