if align=bottom>) will be given only if the
potential used is expanded as
 <p><i><ul>V(R,<img src=theta12.gif align=bottom>)</i> = <i>V</i><sub>00</sub><i>(R)</i> +
<img src=sigma18.gif align=bottom>  <i>V<sub><img src=lambda10.gif></sub></i>(<i>R</i>) 
<tt>x</tt> <i>P<sub><img src=lambda10.gif></sub></i>[<i>cos(<img src=theta12.gif align=bottom></i>)]
</ul> 
<p>where <img src=lambda12.gif> = 1, 2, ...,  <i>P<sub><img src=lambda10.gif></sub></i> is an ordinary Legendre polynomial and the sum extends from
LA