in linear-response stopping power. The first velocity is given by vel_projectile. The next ones are multiples of this initial value.</li><br>
<hr>
<a name=nvirtualg><li>                 <span style="display:inline-block;background:#EEEEEE;width:400px">               <b>nvirtualg</b>  </span>  
<br><br>
<i>Optional</i><br>
Default: 100000<br><br>
Sets the starting state beyond which states are excluded from the sum in the Green's function G.</li><br>
<hr>
<a name=nvirtualw><li>                 <span style="d