<?xml version="1.0" encoding="UTF-8"?>
<!--DOCTYPE HDDS>

  Hall D Geometry Data Base: Materials
  *************************************

     version 1.0: Initial version with all elements and some
                  composites.					-rtj
 
<HDDS specification="v1.0" xmlns="http://www.gluex.org/hdds">
-->

<materials version="1.0"
	   date="2001-04-15"
	   author="R.T. Jones"
           specification="v1.0" >

  <!-- Define the elements -->

  <element name="Hydrogen" symbol="H" z="1" a="1.00797">
	<real name="density"	value="0.0000838" unit="g/cm^3"	/>
	<real name="radlen"	value="61.28"	unit="g/cm^2"	/>
	<real name="collen"	value="43.3"	unit="g/cm^2"	/>
	<real name="abslen"	value="50.8"	unit="g/cm^2"	/>
	<real name="dedx"	value="4.045"	unit="MeV/g/cm^2"	/>
  </element>
  <element name="LiqHydrogen" symbol="LH" z="1" a="1.00797">
	<real name="density"	value="0.0708"	unit="g/cm^3"	/>
	<real name="radlen"	value="61.28"	unit="g/cm^2"	/>
	<real name="collen"	value="43.3"	unit="g/cm^2"	/>
	<real name="abslen"	value="50.8"	unit="g/cm^2"	/>
	<real name="dedx"	value="4.045"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Deuterium" symbol="D" z="1" a="2.01">
	<real name="density"	value="0.000167" unit="g/cm^3"	/>
	<real name="radlen"	value="122.4"	unit="g/cm^2"	/>
	<real name="collen"	value="45.7"	unit="g/cm^2"	/>
	<real name="abslen"	value="54.7"	unit="g/cm^2"	/>
	<real name="dedx"	value="2.052"	unit="MeV/g/cm^2"	/>
  </element>
  <element name="LiqDeuterium" symbol="LD" z="1" a="2.01">
	<real name="density"	value="0.169"	unit="g/cm^3"	/>
	<real name="radlen"	value="122.4"	unit="g/cm^2"	/>
	<real name="collen"	value="45.7"	unit="g/cm^2"	/>
	<real name="abslen"	value="54.7"	unit="g/cm^2"	/>
	<real name="dedx"	value="2.052"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Helium" symbol="He" z="2" a="4.0026">
	<real name="density"	value="0.000166" unit="g/cm^3"	/>
	<real name="radlen"	value="94.32"	unit="g/cm^2"	/>
	<real name="collen"	value="49.9"	unit="g/cm^2"	/>
	<real name="abslen"	value="65.1"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.937"	unit="MeV/g/cm^2"	/>
  </element>
  <element name="LiqHelium" symbol="LHe" z="2" a="4.0026">
	<real name="density"	value="0.125"	unit="g/cm^3"	/>
	<real name="radlen"	value="94.32"	unit="g/cm^2"	/>
	<real name="collen"	value="49.9"	unit="g/cm^2"	/>
	<real name="abslen"	value="65.1"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.937"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Lithium" symbol="Li" z="3" a="6.9410">
	<real name="density"	value="0.534"	unit="g/cm^3"	/>
	<real name="radlen"	value="82.76"	unit="g/cm^2"	/>
	<real name="collen"	value="54.6"	unit="g/cm^2"	/>
	<real name="abslen"	value="73.4"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.639"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Beryllium" symbol="Be" z="4" a="9.0122">
	<real name="density"	value="1.8480"	unit="g/cm^3"	/>
	<real name="radlen"	value="65.19"	unit="g/cm^2"	/>
	<real name="collen"	value="55.8"	unit="g/cm^2"	/>
	<real name="abslen"	value="75.2"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.594"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Boron10" symbol="B10" z="5" a="10.0" />
  <element name="Boron11" symbol="B11" z="5" a="11.0" />
  <element name="Boron" symbol="B" z="5" a="10.8">
	<real name="density"	value="2.34"	unit="g/cm^3"	/>
  </element>

  <element name="Carbon" symbol="C" z="6" a="12.011">
	<real name="density"	value="2.2650"	unit="g/cm^3"	/>
	<real name="radlen"	value="42.70"	unit="g/cm^2"	/>
	<real name="collen"	value="60.2"	unit="g/cm^2"	/>
	<real name="abslen"	value="86.3"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.745"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Nitrogen" symbol="N" z="7" a="14.0067">
	<real name="density"	value="0.00116"	unit="g/cm^3"	/>
	<real name="radlen"	value="37.99"	unit="g/cm^2"	/>
	<real name="collen"	value="61.4"	unit="g/cm^2"	/>
	<real name="abslen"	value="87.8"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.825"	unit="MeV/g/cm^2"	/>
  </element>
  <element name="LiqNitrogen" symbol="LN" z="7" a="14.0067">
	<real name="density"	value="0.8073"	unit="g/cm^3"	/>
	<real name="radlen"	value="37.99"	unit="g/cm^2"	/>
	<real name="collen"	value="61.4"	unit="g/cm^2"	/>
	<real name="abslen"	value="87.8"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.825"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Oxygen" symbol="O" z="8" a="15.9995">
	<real name="density"	value="0.00133"	unit="g/cm^3" />
	<real name="radlen"	value="34.24"	unit="g/cm^2"	/>
	<real name="collen"	value="63.2"	unit="g/cm^2"	/>
	<real name="abslen"	value="91.0"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.801"	unit="MeV/g/cm^2"	/>
  </element>
  <element name="LiqOxygen" symbol="LO" z="8" a="15.9995">
	<real name="density"	value="1.141"	unit="g/cm^3" />
	<real name="radlen"	value="34.24"	unit="g/cm^2"	/>
	<real name="collen"	value="63.2"	unit="g/cm^2"	/>
	<real name="abslen"	value="91.0"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.801"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Fluorine" symbol="F" z="9" a="18.9984">
	<real name="density"	value="0.00158" unit="g/cm^3"	/>
	<real name="radlen"	value="32.93"	unit="g/cm^2"	/>
	<real name="collen"	value="65.5"	unit="g/cm^2"	/>
	<real name="abslen"	value="95.3"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.675"	unit="MeV/g/cm^2"	/>
  </element>
  <element name="LiqFluorine" symbol="LF" z="9" a="18.9984">
	<real name="density"	value="1.507"	unit="g/cm^3"	/>
	<real name="radlen"	value="32.93"	unit="g/cm^2"	/>
	<real name="collen"	value="65.5"	unit="g/cm^2"	/>
	<real name="abslen"	value="95.3"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.675"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Neon" symbol="Ne" z="10" a="20.179">
	<real name="density"	value="0.000830" unit="g/cm^3"	/>
	<real name="radlen"	value="28.94"	unit="g/cm^2"	/>
	<real name="collen"	value="66.1"	unit="g/cm^2"	/>
	<real name="abslen"	value="96.6"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.724"	unit="MeV/g/cm^2"	/>
  </element>
  <element name="LiqNeon" symbol="LNe" z="10" a="20.179">
	<real name="density"	value="1.204"	unit="g/cm^3"	/>
	<real name="radlen"	value="28.94"	unit="g/cm^2"	/>
	<real name="collen"	value="66.1"	unit="g/cm^2"	/>
	<real name="abslen"	value="96.6"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.724"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Sodium" symbol="Na" z="11" a="22.9898">
	<real name="density"	value="0.969"	unit="g/cm^3"	/>
  </element>

  <element name="Magnesium" symbol="Mg" z="12" a="24.305">
	<real name="density"	value="1.735"	unit="g/cm^3"	/>
  </element>

  <element name="Aluminum" symbol="Al" z="13" a="26.9815">
	<real name="density"	value="2.700"	unit="g/cm^3"	/>
	<real name="radlen"	value="24.01"	unit="g/cm^2"	/>
	<real name="collen"	value="70.6"	unit="g/cm^2"	/>
	<real name="abslen"	value="106.4"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.615"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Silicon" symbol="Si" z="14" a="28.086">
	<real name="density"	value="2.33"	unit="g/cm^3"	/>
	<real name="radlen"	value="21.82"	unit="g/cm^2"	/>
	<real name="collen"	value="70.6"	unit="g/cm^2"	/>
	<real name="abslen"	value="106.0"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.664"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Phosphorus" symbol="P" z="15" a="30.9738">
	<real name="density"	value="1.82"	unit="g/cm^3"	/>
  </element>

  <element name="Sulfur" symbol="S" z="16" a="32.06">
	<real name="density"	value="2.07"	unit="g/cm^3"	/>
  </element>

  <element name="Chlorine" symbol="Cl" z="17" a="35.453">
	<real name="density"	value="1.56"	unit="g/cm^3"	/>
  </element>

  <element name="Argon" symbol="Ar" z="18" a="39.948">
	<real name="density"	value="0.00166" unit="g/cm^3"	/>
	<real name="radlen"	value="19.55"	unit="g/cm^2"	/>
	<real name="collen"	value="76.4"	unit="g/cm^2"	/>
	<real name="abslen"	value="117.2"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.519"	unit="MeV/g/cm^2"	/>
  </element>
  <element name="LiqArgon" symbol="LAr" z="18" a="39.948">
	<real name="density"	value="1.396"	unit="g/cm^3"	/>
	<real name="radlen"	value="19.55"	unit="g/cm^2"	/>
	<real name="collen"	value="76.4"	unit="g/cm^2"	/>
	<real name="abslen"	value="117.2"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.519"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Potassium" symbol="K" z="19" a="39.098">
	<real name="density"	value=".860"	unit="g/cm^3"	/>
  </element>

  <element name="Calcium" symbol="Ca" z="20" a="40.08">
	<real name="density"	value="1.55"	unit="g/cm^3"	/>
  </element>

  <element name="Scandium" symbol="Sc" z="21" a="44.956">
	<real name="density"	value="2.98"	unit="g/cm^3"	/>
  </element>

  <element name="Titanium" symbol="Ti" z="22" a="47.90">
	<real name="density"	value="4.53"	unit="g/cm^3"	/>
	<real name="radlen"	value="16.17"	unit="g/cm^2"	/>
	<real name="collen"	value="79.9"	unit="g/cm^2"	/>
	<real name="abslen"	value="124.9"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.476"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Vanadium" symbol="V" z="23" a="50.9414">
	<real name="density"	value="6.10"	unit="g/cm^3"	/>
  </element>

  <element name="Chromium" symbol="Cr" z="24" a="51.996">
	<real name="density"	value="7.18"	unit="g/cm^3"	/>
  </element>

  <element name="Manganese" symbol="Mn" z="25" a="54.9830">
	<real name="density"	value="7.43"	unit="g/cm^3"	/>
  </element>

  <element name="Iron" symbol="Fe" z="26" a="55.847">
	<real name="density"	value="7.87"	unit="g/cm^3"	/>
	<real name="radlen"	value="13.84"	unit="g/cm^2"	/>
	<real name="collen"	value="82.8"	unit="g/cm^2"	/>
	<real name="abslen"	value="131.9"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.451"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Cobalt" symbol="Co" z="27" a="58.9332">
	<real name="density"	value="8.90"	unit="g/cm^3"	/>
  </element>

  <element name="Nickel" symbol="Ni" z="28" a="58.70">
	<real name="density"	value="8.876"	unit="g/cm^3"	/>
  </element>

  <element name="Copper" symbol="Cu" z="29" a="63.546">
	<real name="density"	value="8.96"	unit="g/cm^3"	/>
	<real name="radlen"	value="12.86"	unit="g/cm^2"	/>
	<real name="collen"	value="85.6"	unit="g/cm^2"	/>
	<real name="abslen"	value="134.9"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.403"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Zinc" symbol="Zn" z="30" a="65.38">
	<real name="density"	value="7.112"	unit="g/cm^3"	/>
  </element>

  <element name="Gallium" symbol="Ga" z="31" a="69.72">
	<real name="density"	value="5.877"	unit="g/cm^3"	/>
  </element>

  <element name="Germanium" symbol="Ge" z="32" a="72.59">
	<real name="density"	value="5.3230"	unit="g/cm^3"	/>
	<real name="radlen"	value="12.25"	unit="g/cm^2"	/>
	<real name="collen"	value="88.3"	unit="g/cm^2"	/>
	<real name="abslen"	value="140.5"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.371"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Arsenic" symbol="As" z="33" a="74.9216">
	<real name="density"	value="5.72"	unit="g/cm^3"	/>
  </element>

  <element name="Selenium" symbol="Se" z="34" a="78.96">
	<real name="density"	value="4.78"	unit="g/cm^3"	/>
  </element>

  <element name="Bromine" symbol="Br" z="35" a="79.904">
	<real name="density"	value="3.11"	unit="g/cm^3"	/>
  </element>

  <element name="Krypton" symbol="Kr" z="36" a="83.80">
	<real name="density"	value="2.60"	unit="g/cm^3"	/>
  </element>

  <element name="Rubidium" symbol="Rb" z="37" a="85.4678">
	<real name="density"	value="1.529"	unit="g/cm^3"	/>
  </element>

  <element name="Strontium" symbol="Sr" z="38" a="87.62">
	<real name="density"	value="2.54"	unit="g/cm^3"	/>
  </element>

  <element name="Yttrium" symbol="Y" z="39" a="88.909">
	<real name="density"	value="4.456"	unit="g/cm^3"	/>
  </element>

  <element name="Zirconium" symbol="Zr" z="40" a="91.22">
	<real name="density"	value="6.494"	unit="g/cm^3"	/>
  </element>

  <element name="Niobium" symbol="Nb" z="41" a="92.9064">
	<real name="density"	value="8.55"	unit="g/cm^3"	/>
  </element>

  <element name="Molybdenum" symbol="Mo" z="42" a="95.94">
	<real name="density"	value="10.20"	unit="g/cm^3"	/>
  </element>

  <element name="Technetium" symbol="Tc" z="43" a="97">
	<real name="density"	value="11.48"	unit="g/cm^3"	/>
  </element>

  <element name="Ruthenium" symbol="Ru" z="44" a="101.07">
	<real name="density"	value="12.39"	unit="g/cm^3"	/>
  </element>

  <element name="Rhodium" symbol="Rh" z="45" a="102.905">
	<real name="density"	value="12.39"	unit="g/cm^3"	/>
  </element>

  <element name="Palladium" symbol="Pd" z="46" a="106.04">
	<real name="density"	value="12.00"	unit="g/cm^3"	/>
  </element>

  <element name="Silver" symbol="Ag" z="47" a="107.868">
	<real name="density"	value="10.48"	unit="g/cm^3"	/>
  </element>

  <element name="Cadmium" symbol="Cd" z="48" a="112.40">
	<real name="density"	value="8.63"	unit="g/cm^3"	/>
  </element>

  <element name="Indium" symbol="In" z="49" a="114.82">
	<real name="density"	value="7.30"	unit="g/cm^3"	/>
  </element>

  <element name="Tin" symbol="Sn" z="50" a="118.69">
	<real name="density"	value="7.31"	unit="g/cm^3"	/>
	<real name="radlen"	value="8.82"	unit="g/cm^2"	/>
	<real name="collen"	value="100.2"	unit="g/cm^2"	/>
	<real name="abslen"	value="163"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.264"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Antimony" symbol="Sb" z="51" a="121.75">
	<real name="density"	value="6.679"	unit="g/cm^3"	/>
  </element>

  <element name="Tellurium" symbol="Te" z="52" a="127.60">
	<real name="density"	value="6.23"	unit="g/cm^3"	/>
  </element>

  <element name="Iodine" symbol="I" z="53" a="126.9046">
	<real name="density"	value="7.30"	unit="g/cm^3"	/>
  </element>

  <element name="Xenon" symbol="Xe" z="54" a="131.30">
	<real name="density"	value="0.00546" unit="g/cm^3"	/>
	<real name="radlen"	value="8.48"	unit="g/cm^2"	/>
	<real name="collen"	value="102.8"	unit="g/cm^2"	/>
	<real name="abslen"	value="169"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.255"	unit="MeV/g/cm^2"	/>
  </element>
  <element name="LiqXenon" symbol="LXe" z="54" a="131.30">
	<real name="density"	value="2.953"	unit="g/cm^3"	/>
	<real name="radlen"	value="8.48"	unit="g/cm^2"	/>
	<real name="collen"	value="102.8"	unit="g/cm^2"	/>
	<real name="abslen"	value="169"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.255"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Cesium" symbol="Cs" z="55" a="132.905">
	<real name="density"	value="1.870"	unit="g/cm^3"	/>
  </element>

  <element name="Barium" symbol="Ba" z="56" a="137.34">
	<real name="density"	value="3.50"	unit="g/cm^3"	/>
  </element>

  <element name="Larthanum" symbol="La" z="57" a="138.91">
	<real name="density"	value="6.127"	unit="g/cm^3"	/>
  </element>

  <element name="Cerium" symbol="Ce" z="58" a="140.12">
	<real name="density"	value="6.637"	unit="g/cm^3"	/>
  </element>

  <element name="Praseodymium" symbol="Pr" z="59" a="140.908" />

  <element name="Neodymium" symbol="Nd" z="60" a="144.24" />

  <element name="Promethium" symbol="Pm" z="61" a="145" />

  <element name="Samarium" symbol="Sm" z="62" a="150.4" />

  <element name="Europium" symbol="Eu" z="63" a="151.96" />

  <element name="Gadolinium" symbol="Gd" z="64" a="157.25" />

  <element name="Terbium" symbol="Tb" z="65" a="158.925" />

  <element name="Dysprosium" symbol="Dy" z="66" a="162.50" />

  <element name="Holmium" symbol="Ho" z="67" a="164.930" />

  <element name="Erbium" symbol="Er" z="68" a="167.26" />

  <element name="Thulium" symbol="Tm" z="69" a="168.934" />

  <element name="Ytterbium" symbol="Yb" z="70" a="173.04" />

  <element name="Lutetium" symbol="Lu" z="71" a="174.97" />

  <element name="Hafnium" symbol="Hf" z="72" a="178.49" />

  <element name="Tantalum" symbol="Ta" z="73" a="180.948" />

  <element name="Tungsten" symbol="W" z="74" a="183.85">
	<real name="density"	value="19.3"	unit="g/cm^3"	/>
	<real name="radlen"	value="6.76"	unit="g/cm^2"	/>
	<real name="collen"	value="110.3"	unit="g/cm^2"	/>
	<real name="abslen"	value="185"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.145"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Rhenium" symbol="Re" z="75" a="186.207" />

  <element name="Osmium" symbol="Os" z="76" a="190.2" />

  <element name="Iridium" symbol="Ir" z="77" a="192.22" />

  <element name="Platinum" symbol="Pt" z="78" a="195.09">
	<real name="radlen"	value="6.54"	unit="g/cm^2"	/>
	<real name="collen"	value="113.3"	unit="g/cm^2"	/>
	<real name="abslen"	value="189.7"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.129"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Gold" symbol="Au" z="79" a="196.967">
	<real name="density"	value="18.85"	unit="g/cm^3"	/>
  </element>

  <element name="Mercury" symbol="Hg" z="80" a="200.59" />

  <element name="Thallium" symbol="Tl" z="81" a="204.37" />

  <element name="Lead" symbol="Pb" z="82" a="207.2">
	<real name="density"	value="11.35"	unit="g/cm^3"	/>
	<real name="radlen"	value="6.37"	unit="g/cm^2"	/>
	<real name="collen"	value="116.2"	unit="g/cm^2"	/>
	<real name="abslen"	value="194"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.123"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Bismuth" symbol="Bi" z="83" a="208.980">
	<real name="density"	value="9.37"	unit="g/cm^3"	/>
  </element>

  <element name="Polonium" symbol="Po" z="84" a="209" />

  <element name="Astatine" symbol="At" z="85" a="210" />

  <element name="Radon" symbol="Rn" z="86" a="222" />

  <element name="Francium" symbol="Fr" z="87" a="223" />

  <element name="Radium" symbol="Ra" z="88" a="226.03" />

  <element name="Actinium" symbol="Ac" z="89" a="227" />

  <element name="Thorium" symbol="Th" z="90" a="232.038" />

  <element name="Protactinium" symbol="Pa" z="91" a="231.038" />

  <element name="Uranium" symbol="U" z="92" a="238.03">
	<real name="density"	value="18.950"	unit="g/cm^3"	/>
	<real name="radlen"	value="6.00"	unit="g/cm^2"	/>
	<real name="collen"	value="117.0"	unit="g/cm^2"	/>
	<real name="abslen"	value="199"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.082"	unit="MeV/g/cm^2"	/>
  </element>

  <element name="Neptunium" symbol="Np" z="93" a="237.048" />

  <!-- Define the composite materials -->

  <element name="Vacuum" symbol="Vac" z="0" a="0">
	<real name="density"	value="0.0"	unit="g/cm^3"	/>
	<real name="radlen"	value="1.0"	unit="g/cm^2"	/>
	<real name="collen"	value="1.0"	unit="g/cm^2"	/>
	<real name="abslen"	value="1.0"	unit="g/cm^2"	/>
	<real name="dedx"	value="0.0"	unit="MeV/g/cm^2"	/>
  </element>


  <composite name="Scintillator">
	<addmaterial material="Carbon">   <natoms n="9"	/> </addmaterial>
	<addmaterial material="Hydrogen"> <natoms n="10" /></addmaterial>
	<real name="density"	value="1.032"	unit="g/cm^3"	/>
	<real name="radlen"	value="43.72"	unit="g/cm^2"	/>
	<real name="collen"	value="58.5"	unit="g/cm^2"	/>
	<real name="abslen"	value="81.9"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.936"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Air">
	<addmaterial material="Nitrogen">
		<fractionmass	fraction="0.7494"	/>
	</addmaterial>
	<addmaterial material="Oxygen">
		<fractionmass	fraction="0.2369"	/>
	</addmaterial>
	<addmaterial material="Argon">
		<fractionmass	fraction="0.0129"	/>
	</addmaterial>
	<addmaterial material="Hydrogen">
		<fractionmass	fraction="0.0008"	/>
	</addmaterial>
	<real name="density"	value="0.001214"	unit="g/cm^3" />
	<real name="radlen"	value="36.66"	unit="g/cm^2"	/>
	<real name="collen"	value="62.0"	unit="g/cm^2"	/>
	<real name="abslen"	value="90.0"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.815"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="CO2">
	<addmaterial material="Carbon">  <natoms n="1"	/> </addmaterial>
	<addmaterial material="Oxygen">  <natoms n="2"	/> </addmaterial>
	<real name="density"	value="0.001977"	unit="g/cm^3"	/>
	<real name="radlen"	value="36.2"	unit="g/cm^2"	/>
	<real name="collen"	value="62.4"	unit="g/cm^2"	/>
	<real name="abslen"	value="89.7"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.819"	unit="MeV/g/cm^2"	/>
  </composite>
   
  <composite name="ArCO2">
	<addmaterial material="Argon">
		<fractionmass	fraction="0.93"	/>
	</addmaterial>
	<addmaterial material="CO2">
		<fractionmass	fraction="0.07"	/>
	</addmaterial>
  </composite>

  <composite name="Bakelite">
	<addmaterial material="Carbon">   <natoms n="1"	/> </addmaterial>
	<addmaterial material="Hydrogen"> <natoms n="4"	/> </addmaterial>
	<addmaterial material="Oxygen">   <natoms n="2"	/> </addmaterial>
	<real name="density"	value="1.4"	unit="g/cm^3"	/>
  </composite>

 <composite name="Nomex">
 	<addmaterial material="Hydrogen"> <natoms n="14" /> </addmaterial>
 	<addmaterial material="Oxygen"> <natoms n="4" /> </addmaterial>
 	<addmaterial material="Carbon"> <natoms n="14" /> </addmaterial>
 	<addmaterial material="Nitrogen"> <natoms n="2" /> </addmaterial>
 	<real name="density" value="0.029" unit="g/cm^3" />
</composite>


  <composite name="Nylon">
	<addmaterial material="Nitrogen"> <natoms n="1"	/> </addmaterial>
	<addmaterial material="Carbon">   <natoms n="6"	/> </addmaterial>
	<addmaterial material="Hydrogen"> <natoms n="11" /></addmaterial>
	<addmaterial material="Oxygen">   <natoms n="1"	/> </addmaterial>
	<real name="density"	value="1.14"	unit="g/cm^3"	/>
	<real name="radlen"	value="36.7"	unit="g/cm^2"	/>
	<real name="collen"	value="58.5"	unit="g/cm^2"	/>
	<real name="abslen"	value="81.5"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.974"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Lexan">
	<addmaterial material="Carbon">   <natoms n="16" /></addmaterial>
	<addmaterial material="Hydrogen"> <natoms n="14" /></addmaterial>
	<addmaterial material="Oxygen">   <natoms n="3"	/> </addmaterial>
	<real name="density"	value="1.20"	unit="g/cm^3"	/>
	<real name="radlen"	value="34.6"	unit="g/cm^2"	/>
	<real name="collen"	value="59.5"	unit="g/cm^2"	/>
	<real name="abslen"	value="83.9"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.886"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Mylar">
	<addmaterial material="Carbon">   <natoms n="5"	/> </addmaterial>
	<addmaterial material="Hydrogen"> <natoms n="4"	/> </addmaterial>
	<addmaterial material="Oxygen">   <natoms n="2"	/> </addmaterial>
	<real name="density"	value="1.39"	unit="g/cm^3"	/>
	<real name="radlen"	value="39.95"	unit="g/cm^2"	/>
	<real name="collen"	value="60.2"	unit="g/cm^2"	/>
	<real name="abslen"	value="85.7"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.848"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Polyethylene">
	<addmaterial material="Carbon">   <natoms n="1"	/> </addmaterial>
	<addmaterial material="Hydrogen"> <natoms n="2"	/> </addmaterial>
	<real name="density"	value="0.95"	unit="g/cm^3"	/>
	<real name="radlen"	value="44.64"	unit="g/cm^2"	/>
	<real name="collen"	value="57.0"	unit="g/cm^2"	/>
	<real name="abslen"	value="78.4"	unit="g/cm^2"	/>
	<real name="dedx"	value="2.076"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Kapton">
	<addmaterial material="Carbon">   <natoms n="22" /></addmaterial>
	<addmaterial material="Hydrogen"> <natoms n="10" /></addmaterial>
	<addmaterial material="Oxygen">   <natoms n="5"	/> </addmaterial>
	<addmaterial material="Nitrogen"> <natoms n="2"	/> </addmaterial>
	<real name="density"	value="1.42"	unit="g/cm^3"	/>
	<real name="radlen"	value="40.56"	unit="g/cm^2"	/>
	<real name="collen"	value="60.3"	unit="g/cm^2"	/>
	<real name="abslen"	value="85.8"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.820"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Plexiglas">
	<addmaterial material="Carbon">   <natoms n="5"	/> </addmaterial>
	<addmaterial material="Hydrogen"> <natoms n="8"	/> </addmaterial>
	<addmaterial material="Oxygen">   <natoms n="2"	/> </addmaterial>
	<real name="density"	value="1.20"	unit="g/cm^3"	/>
	<real name="radlen"	value="40.49"	unit="g/cm^2"	/>
	<real name="collen"	value="59.3"	unit="g/cm^2"	/>
	<real name="abslen"	value="83.0"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.929"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Polystyrene">
	<addmaterial material="Carbon">   <natoms n="8"	/> </addmaterial>
	<addmaterial material="Hydrogen"> <natoms n="8"	/> </addmaterial>
	<real name="density"	value="1.032"	unit="g/cm^3"	/>
	<real name="radlen"	value="43.72"	unit="g/cm^2"	/>
	<real name="collen"	value="58.5"	unit="g/cm^2"	/>
	<real name="abslen"	value="81.9"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.936"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Teflon">
	<addmaterial material="Carbon">   <natoms n="1"	/> </addmaterial>
	<addmaterial material="Fluorine"> <natoms n="2"	/> </addmaterial>
	<real name="density"	value="2.20"	unit="g/cm^3"	/>
	<real name="radlen"	value="34.84"	unit="g/cm^2"	/>
	<real name="collen"	value="64.2"	unit="g/cm^2"	/>
	<real name="abslen"	value="93.0"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.671"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Pyrex">
	<addmaterial material="Silicon">  <natoms n="15" /></addmaterial>
	<addmaterial material="Boron">    <natoms n="2"	/> </addmaterial>
	<addmaterial material="Sodium">   <natoms n="1"	/> </addmaterial>
	<addmaterial material="Oxygen">   <natoms n="33" /></addmaterial>
	<real name="density"	value="2.23"	unit="g/cm^3"	/>
	<real name="radlen"	value="28.3"	unit="g/cm^2"	/>
	<real name="collen"	value="66.2"	unit="g/cm^2"	/>
	<real name="abslen"	value="97.6"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.695"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="CarbonFiber">
	<addmaterial material="Carbon">   <natoms n="1"	/> </addmaterial>
	<real name="density"	value="2.2650"	unit="g/cm^3"	/>
	<real name="radlen"	value="42.70"	unit="g/cm^2"	/>
	<real name="collen"	value="60.2"	unit="g/cm^2"	/>
	<real name="abslen"	value="86.3"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.745"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Ethane">
	<addmaterial material="Carbon">   <natoms n="2"	/> </addmaterial>
	<addmaterial material="Hydrogen"> <natoms n="6"	/> </addmaterial>
	<real name="density"	value=".001356"	unit="g/cm^3" />
	<real name="radlen"	value="45.47"	unit="g/cm^2"	/>
	<real name="collen"	value="55.8"	unit="g/cm^2"	/>
	<real name="abslen"	value="75.7"	unit="g/cm^2"	/>
	<real name="dedx"	value="2.304"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="Freon">
	<addmaterial material="Carbon">   <natoms n="1"	/> </addmaterial>
	<addmaterial material="Fluorine"> <natoms n="4"	/> </addmaterial>
	<real name="density"	value=".003929"	unit="g/cm^3" />
	<real name="radlen"	value="32.93"	unit="g/cm^2"	/>
	<real name="collen"	value="65.5"	unit="g/cm^2"	/>
	<real name="abslen"	value="95.3"	unit="g/cm^2"	/>
	<real name="dedx"	value="1.675"	unit="MeV/g/cm^2"	/>
  </composite>

  <composite name="chamberGas">
	<addmaterial material="Argon">
		<fractionmass	fraction="0.85"	/>
 	</addmaterial>
	<addmaterial material="CO2">
		<fractionmass	fraction="0.15"	/>
 	</addmaterial>
  </composite>

  <composite name="CopperKapton">
	<addmaterial material="Copper">
		<fractionmass	fraction="0.89"	/>
 	</addmaterial>
	<addmaterial material="Kapton">
		<fractionmass	fraction="0.11"	/>
 	</addmaterial>
  </composite>

  <composite name="chamberMix">
	<addmaterial material="Argon">
		<fractionmass	fraction="0.49"	/>
 	</addmaterial>
	<addmaterial material="Ethane">
		<fractionmass	fraction="0.20"	/>
 	</addmaterial>
	<addmaterial material="Freon">
		<fractionmass	fraction="0.30"	/>
 	</addmaterial>
	<addmaterial material="Aluminum">
		<fractionmass	fraction="0.01"	/>
 	</addmaterial>
  </composite>

  <composite name="leadScint">
	<addmaterial material="Scintillator">
		<fractionmass	fraction="0.15"	/>
 	</addmaterial>
	<addmaterial material="Lead">
		<fractionmass	fraction="0.85"	/>
 	</addmaterial>
  </composite>

  <composite name="leadGlassSF3">
	<addmaterial material="Lead">
		<fractionmass	fraction="0.42"	/>
 	</addmaterial>
	<addmaterial material="Silicon">
		<fractionmass	fraction="0.20"	/>
 	</addmaterial>
	<addmaterial material="Potassium">
		<fractionmass	fraction="0.09"	/>
 	</addmaterial>
	<addmaterial material="Sodium">
		<fractionmass	fraction="0.01"	/>
 	</addmaterial>
	<addmaterial material="Oxygen">
		<fractionmass	fraction="0.28"	/>
 	</addmaterial>
	<real name="density"	value="3.60"	unit="g/cm^3" />
  </composite>

  <composite name="CerenkovGas">          <!-- right now just nitrogen -->
	<addmaterial material="Nitrogen">
		<fractionmass	fraction="1.00"	/>
 	</addmaterial>
	<real name="density"	value="0.001214"	unit="g/cm^3" />
  </composite>

  <composite name="BoronNitride"> 
	<addmaterial material="Boron">
		<natoms n="1"/>
	</addmaterial>
	<addmaterial material="Nitrogen">
		<natoms n="1"/>
	</addmaterial>
        <real name="density"	value="1.9"	unit="g/cm^3"/>
  </composite>

  <composite name="Concrete">
	<addmaterial material="Hydrogen">
		<fractionmass	fraction="0.004"/>
 	</addmaterial>
	<addmaterial material="Oxygen">
		<fractionmass	fraction="0.509"/>
 	</addmaterial>
	<addmaterial material="Aluminum">
		<fractionmass	fraction="0.034"/>
 	</addmaterial>
        <addmaterial material="Calcium">
                <fractionmass   fraction="0.070"/>
        </addmaterial>
        <addmaterial material="Silicon">
                <fractionmass   fraction="0.345"/>
        </addmaterial>
        <addmaterial material="Iron">
                <fractionmass   fraction="0.038"/>
        </addmaterial>
        <real name="density"	value="2.35"	unit="g/cm^3" />
  </composite>

  <composite name="SoftTungsten">
	<addmaterial material="Tungsten">
		<fractionmass	fraction="0.95"	/>
 	</addmaterial>
	<addmaterial material="Copper">
		<fractionmass	fraction="0.05"	/>
 	</addmaterial>
  </composite>

  <composite name="TaggerVacuum">
	<addmaterial material="Air">
		<fractionmass	fraction="0.99"	/>
 	</addmaterial>
	<addmaterial material="Helium">
		<fractionmass	fraction="0.01"	/>
 	</addmaterial>
	<real name="density"	value="0.001214e-7"	unit="g/cm^3" />
	<real name="radlen"	value="36.66e-7"	unit="g/cm^2"	/>
	<real name="collen"	value="62.0e-7"		unit="g/cm^2"	/>
	<real name="abslen"	value="90.0e-7"		unit="g/cm^2"	/>
	<real name="dedx"	value="1.815e-7"	unit="MeV/g/cm^2"/>
  </composite>
</materials>

<!-- </HDDS> -->
