<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi<br>Some people take this formula to compute U for their material.<br>E(d_n+1)+E(d_n-1)-2E(d_n)==U<br>For isolated atom(Ti), the HOMO and LUMO is d orbital. On the other hand the affinity and ionization energy is like this:<br><pre><i>A = E(n)-E(n+1)<br></i><i>I = E(n-1)-E(n)<br>So can I compute A and I and then U=A-I. Is is correct?<br>thanks a lot<br></i></pre><br><br>Ali Kazempour<br>
Physics department, Isfahan University of Technology<br>
84156 Isfahan, Iran. Tel-1: +98 311 391 3733<br>
Fax: +98 311 391 2376 Tel-2: +98 311 391 2375</td></tr></table><br>