<?xml version='1.0' encoding='utf-8'?>
<model>
  <materials>
  </materials>
  <geometry>
    <cell id="1" material="void" region="-1" universe="1"/>
    <surface boundary="vacuum" coeffs="0.0 0.0 0.0 200" id="1" type="sphere"/>
  </geometry>
  <settings>
    <run_mode>fixed source</run_mode>
    <particles>100</particles>
    <batches>10</batches>
    <source particle="neutron" strength="1.0" type="independent">
      <space type="point">
        <parameters>0.0 0.0 0.0</parameters>
      </space>
      <energy type="discrete">
        <parameters>10000.0 1.0</parameters>
      </energy>
    </source>
    <cutoff>
      <time_neutron>1e-07</time_neutron>
    </cutoff>
  </settings>
  <tallies>
    <filter id="1" type="time">
      <bins>0.0 1e-07 2e-07</bins>
    </filter>
    <tally id="1">
      <filters>1</filters>
      <scores>flux</scores>
    </tally>
  </tallies>
</model>
