 screening of the negligible integrals. Possible values are 'low', 'medium', 'high', 'very high', 'insane'. It could be abbreviated in 'l', 'm', 'h', 'vh', 'i'. 'high' is usually fine. 'insane' is only meant for debugging since it is overdoing a lot.</li><br>
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<a name=kerker_k0><li>                 <span style="display:inline-block;background:#EEEEEE;width:400px">               <b>kerker_k0</b>  </span>  
<b><font color="red">EXPERIMENTAL</font> </b> 
<br><br>
<i>Optional</i><br>
Default: 0.0<br><br>
An