e>minimum = 0.</code>)<br/>
The width of a Gaussian distribution of the <i>z</i> location of the
interaction vertex. 
  

<p/><code>parm&nbsp; </code><strong> Beams:maxDevVertex &nbsp;</strong> 
 (<code>default = <strong>5.</strong></code>; <code>minimum = 0.</code>)<br/>
The triply Gaussian distribution of interaction vertex position 
<i>(x, y, z)</i> is restricted to a maximal total deviation from the 
origin, like
<br/><i>
x^2/sigma_x^2 + y^2/sigma_y^2 + z^2/sigma_z^2 < maxDevVertex^2
</i><br/>
(Note the