<DIV><FONT face="times new roman" size=3>Hi All,</FONT></DIV> <DIV><FONT face="times new roman" size=3></FONT> </DIV> <DIV><FONT face="times new roman" size=3>I am new user trying to model new detector materials for emission tomography.</FONT></DIV> <DIV><FONT face="times new roman" size=3></FONT> </DIV> <DIV><FONT face="times new roman" size=3>It is compound material AB4:(10%C) for instance, </FONT><FONT face="times new roman" size=3>where this  material is doped with fraction of 10% C . I have read about defining new compound and materials but it is not completely clear how I can use  </FONT><FONT face="times new roman" size=3>GateMaterials.db file as it is allowed to me to change the name of element and number of atoms.  </FONT><FONT face="times new roman" size=3>What about specifying 10% of  C element for example?</FONT></DIV> <DIV><FONT face="Times New Roman" size=3></FONT> </DIV> <DIV><FONT face="Times New Roman" size=3>Also I may ask the developer who did CZT as it is similar thing.</FONT></DIV> <DIV align=left><FONT face="times new roman" size=3></FONT> </DIV> <DIV align=left><FONT face="times new roman" size=3>Has anyone come cross these things?</FONT></DIV> <DIV align=left><FONT face="times new roman" size=3></FONT> </DIV> <DIV align=left><FONT face="times new roman" size=3>Best wishes</FONT></DIV> <DIV align=left><FONT face="Times New Roman" size=3></FONT> </DIV> <DIV align=left><FONT face="Times New Roman" size=3>Karine</FONT></DIV><p> Send instant messages to your online friends http://uk.messenger.yahoo.com