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Basis functions

$\begin{displaymath}\left( {1 \over 2} \nabla^2 + E \right) \chi({\bf r}) = 0; \q... ...ft (\left\vert {\bf r} \right\vert = R_{\rm {reg}} \right) = 0 \end{displaymath}$

$\begin{displaymath}\Rightarrow \chi({\bf r}) = \left\{ \begin{array}{ll} j_{\ell... ...R_{\rm {reg}} \\ 0, & r \geq R_{\rm {reg}} \end{array}\right. \end{displaymath}$

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$\begin{picture}(240,80) \put(120,-10){\includegraphics[height=8cm]{sphbess.eps}}... ...10,20){\textcolor{blue}{$\bullet~$}$E = {1 \over 2} q_{n \ell}^2$} \end{picture}$

Peter D. Haynes 2001-11-09