<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><P style="MARGIN: 0in 0in 0pt" class=MsoNormal><FONT size=3 face="Times New Roman">Dear molpro experts:</FONT></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p><FONT size=3 face="Times New Roman"> </FONT></o:p></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><FONT size=3><FONT face="Times New Roman">I try to do dipole transition moment calculations along a reaction path.<SPAN style="mso-spacerun: yes"> </SPAN>In this type of calculation it is important that the signs of the phases of the wave-functions do not change from one point to another.<SPAN style="mso-spacerun: yes"> </SPAN>Is there any provision in MOLPRO to ensure that the phases are all continuous at each succeeding point?<SPAN style="mso-spacerun: yes"> </SPAN>If not how can one handle the abrupt sign changes that plague such calculations?<SPAN style="mso-spacerun: yes"> </SPAN></FONT></FONT></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><o:p><FONT size=3 face="Times New Roman"> </FONT></o:p></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><FONT size=3 face="Times New Roman">Many thanks,</FONT></DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNormal><FONT size=3 face="Times New Roman">A. Mitropoulos</FONT></DIV></td></tr></table>