Über das Verhältnis der Wirkungsquerschnitte für den (e, n)- und (γ,n)-Prozeß

Abstract

The ratio of the cross sections for the (e, n)-and (γ, n)-process is derived with the use of the relativistic Coulomb Eigenfunctions for the continuous spectrum, used bySommerfeld-Maue andBethe-Maximon. Only the electric and magnetic dipole transition are considered. For this transitions the Coulomb correction to the Born approximation is calculated. The result of an estimation of the electric quadrupole transition is given. The effect of screening and that of finite nuclear size is estimated. With the ratio thus obtained one is able to calculate the cross sections for the (e, n)- and (γ, n)-process using the experimental values of only one of this quantities.