10.tex

{{\phi }}_{{n}}({\kappa })=\frac{1}{4{{\pi }}^{2}{{\kappa }}^{2}} {\int }_{0}^{\infty }\frac{\sin({\kappa }{R})}{{\kappa }{R}} \frac{\partial }{\partial {R}} \left\lbrack {{R}}^{2}\frac{\partial {{D}}_{{n}}({R})}{\partial {R}} \right\rbrack  \,{d}{R}