<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1438167084342_11331"><font id="yui_3_16_0_1_1438167084342_11614" face="times new roman, new york, times, serif">Hi everybody,</font></div><div id="yui_3_16_0_1_1438167084342_11533"><br></div><div dir="ltr" id="yui_3_16_0_1_1438167084342_11529"><font id="yui_3_16_0_1_1438167084342_11530" face="times new roman, new york, times, serif">I want to define an extended photon source which should be sampled based on a Gaussian function. But it seems there isn't such a capability in gate! As I found out, one can just select the type (Point, Plane, Volume) and then the shape (rectangular, ellipse, cylinder, ...) of the source. And the gate would sample uniformly over the source. What about if we need a non-uniform (Gaussian) sampling of particles? Does anybody have a clue on this problem?</font></div><div id="yui_3_16_0_1_1438167084342_11700" dir="ltr"><font id="yui_3_16_0_1_1438167084342_11530" face="times new roman, new york, times, serif">I remember that in MCNP code, that's possible easily.</font></div><div id="yui_3_16_0_1_1438167084342_11712" dir="ltr"><br></div><div id="yui_3_16_0_1_1438167084342_11713" dir="ltr"><font id="yui_3_16_0_1_1438167084342_11530" face="times new roman, new york, times, serif">Thanks in advance<br></font></div><div id="yui_3_16_0_1_1438167084342_11720" dir="ltr"><font id="yui_3_16_0_1_1438167084342_11530" face="times new roman, new york, times, serif">Somayeh<br></font></div><div id="yui_3_16_0_1_1438167084342_11379"><br></div></div></body></html>