Several people I have talked to about my research have referred me to Molpro because it has the capability of using Slater-type functions instead of Gaussians and I have finally gained access to a computer with Molpro installed. Unfortunately, I have never used it before and have very little time on the computer itself to be able to accustom myself to how it works. If any of you have time to answer my questions, I would be very appreciative.<br>
<br><br><b>My research:</b> I am trying to calculate the charge density at the nucleus of 7Be, 7Be+, and 7Be++ in order to figure out relative decay constants for these three ions. I have already done this using SCF and DFT calculations with NWChem and come up with some very interesting results. I would now like to compare my results with some more accurate methods just to verify what I did before.<br>
<br><b>My Questions:</b><br><ul><li>I understand that density matricies are available for MP2, MP3 (if all electrons are correlated), QCISD, QCISD(T), and CCSD (relaxed: if all electrons are correlated / unrelaxed: frozen core). So, for example, if I wanted to find the density matrix for CCSD, would this code do the trick? </li>
</ul><div style="margin-left: 80px;">***,Be ! title<br><br>basis=Partridge3 ! select basis set<br><br>geomtyp=xyz ! use xyz geometry<br>geometry={<br> 1 ! number of atoms<br>
Neutral beryllium ! title<br> Be 0 0 0 ! xyz coords<br> }<br><br>set, charge=0 ! sets charge for entire sys<br><br>ccsd ! do CCSD calculation<br>core,0 ! no frozen core<br>
expec, relax, dm ! save the density matrix<br><br>---<br></div><ul><li>If I wanted to use Slater-type functions instead of a Gaussian basis set, do you use the SMILES module or is there something else that you do?</li>
<li>If so, how do I go about choosing which basis set to use?</li></ul>I'm sorry to bother all of you with all of my questions. Thank you to everyone that has already helped me and thank you in advance to those who are willing to give me a hand.<br>
<br><br>Mark Hutchison<br>undergraduate physics student<br>Brigham Young University<br>