Search found 149 matches

by kennethruud
01 Nov 2018, 17:40
Forum: Running Dalton
Topic: Trying to calculate optical rotation
Replies: 5
Views: 82

Re: Trying to calculate optical rotation

The optical rotation reported is the specific optical rotation, which is given in degrees/(dm g/cm^3).


Kenneth
by kennethruud
15 Oct 2018, 14:24
Forum: Running Dalton
Topic: Error calculating polarizability for hydrogen α (i ω) exit code 139
Replies: 10
Views: 272

Re: Error calculating polarizability for hydrogen α (i ω) exit code 139

The reason for the crash is no doubt that your trying to calculate an open-shell system. However, this also suggests that the calculations you have done for oxygen and carbon are probably been calculated as closed-shell system, thus not representative of the atoms you want to study. Dalton has limit...
by kennethruud
04 Aug 2018, 16:22
Forum: Running Dalton
Topic: Project small basis set on larger one
Replies: 7
Views: 594

Re: Project small basis set on larger one

That functionality is, as Hans Jørgen points out, currently not available. It is not clear how much of a computational saving you would get from this. If you struggle with convergence with the larger (and possibly diffuse) basis sets, it could be just as efficient to try to first optimize the +2 cat...
by kennethruud
30 Jul 2018, 09:59
Forum: Running Dalton
Topic: A term Magnetic Circular Dichroism
Replies: 1
Views: 193

Re: A term Magnetic Circular Dichroism

Unfortunately not. We have not implemented a way to calculate the A term of MCD using a more traditional response theory approach. To the best of my knowledge, ADF can do this using a more conventional response theory approach at the DFT level of theory, and ORCA using its MRCI module. Best regards,...
by kennethruud
17 Mar 2018, 14:20
Forum: Running Dalton
Topic: Phosphorescent emission of Pt complex
Replies: 3
Views: 860

Re: Phosphorescent emission of Pt complex

Increase .ROOTS to the number of excited states you want to calculate.


Kenneth
by kennethruud
17 Mar 2018, 14:19
Forum: Running Dalton
Topic: How to calculate phosphorescence
Replies: 1
Views: 720

Re: How to calculate phosphorescence

Increase .ROOTS to the number of excited states you want to calculate. The three components printed correspond to the three components of the electric dipole operator. Normally, you would be interested in the isotropic average of these components, and this is also printed in the output. Best regards...
by kennethruud
27 Nov 2017, 21:20
Forum: Running Dalton
Topic: How to read quadratic response double residue output
Replies: 3
Views: 1508

Re: How to read quadratic response double residue output

A-<A> means the operator minus the value of the operator averaged over the ground-state electron density (<0|A|0>). If the two states B and C are equal, this means that what you would get from the double residue would be the excited-state value of A minus that of the ground-state value. As the state...
by kennethruud
27 Nov 2017, 07:15
Forum: Running Dalton
Topic: How to read quadratic response double residue output
Replies: 3
Views: 1508

Re: How to read quadratic response double residue output

Hi!

To me, your suggested procedure seems to be the right one.


Best regards,

Kenneth
by kennethruud
27 Nov 2017, 07:14
Forum: Running Dalton
Topic: MCSCF Electronic g-tensor calculation
Replies: 2
Views: 1358

Re: MCSCF Electronic g-tensor calculation

You have not requested the calculation of two-electron spin-orbit integrals as far as I can see. In the *dal inout file, add a section

**INTEGRALS
.SPIN-ORBIT

and I think/hope it should work.


Best regards,

Kenneth
by kennethruud
13 Nov 2017, 22:52
Forum: Running Dalton
Topic: Three-photon circular dichroism
Replies: 2
Views: 1433

Re: Three-photon circular dichroism

Hi! Thanks for your interest in 3PCD. In the regular Dalton release, there are no keywords to automatically provide you with the observable quantity, and you would instead have to generate the observable by combining the right components of the various cubic response functions. We are soon (I hope) ...
by kennethruud
08 Aug 2017, 04:48
Forum: Running Dalton
Topic: Static and dynamic hyperpolarizabilities by CCSD(T)
Replies: 5
Views: 3857

Re: Static and dynamic hyperpolarizabilities by CCSD(T)

Dear Dalton Experts, Is it possible to calculate higher rank values, i.e. dipole-dipole-quadrupole beta? Not being an expert on the CC code, but from what I can see in the manual, this should be possible, as the dispersion coefficients seems to be defined in terms of arbitrary operators. Kenneth
by kennethruud
06 Aug 2017, 14:51
Forum: Running Dalton
Topic: Frequency-Dependent Polarizability
Replies: 1
Views: 1178

Re: Frequency-Dependent Polarizability

Hi! I somewhat belated answer, but hopefully nevertheless of some use. By default, Dalton will calculate the polarizability for lowest state of the given spin and spatial symmetry. For molecules with high symmetry, and using MCSCF wave functions to change spin symmetry, quite a few states can determ...
by kennethruud
03 Aug 2017, 13:06
Forum: Running Dalton
Topic: 2NDORD Geometry optimization error:
Replies: 8
Views: 2759

Re: 2NDORD Geometry optimization error:

Hi! I guess the previous example only involved a vibrational analysis only in the final step. The easy way out of this would be to remove the keyword ".2NDORD" under *OPTIMIZE. The default optimization scheme is a first-order scheme, and this will then be used. I note your cavity have many warnings,...
by kennethruud
30 Jun 2017, 13:44
Forum: Running Dalton
Topic: Negative polarizability for H2 at larger r ( freq. dependent )
Replies: 2
Views: 1624

Re: Negative polarizability for H2 at larger r ( freq. dependent )

Dear Ankit, I believe this is a correct result and a consequence of the fact that the lowest excited state in the totally symmetric irrep becomes lower as you stretch the bond. The polarizability will change sign once you pass the lowest excited state of a given symmetry, as shown for instance by No...
by kennethruud
11 May 2017, 22:09
Forum: Running Dalton
Topic: What is the unit of optical rotation in Dalton outfile
Replies: 2
Views: 1930

Re: What is the unit of optical rotation in Dalton outfile

Hi! Without telling us anything about your calculation nor the molecule, it is very difficult to give any indication of what the problem is. Calculating accurate optical rotations is challenging, and the results may depend strongly on factors such as basis set, exchange-correlation functional (or yo...
by kennethruud
08 May 2017, 12:21
Forum: Bug reports
Topic: CC2 Energy: wrong MP2 values leading to failure
Replies: 10
Views: 4861

Re: CC2 Energy: wrong MP2 values leading to failure

Hmmm, somewhat surprised myself. Could you try a Hartree-Fock calculation and see if the end result is the same. I am somewhat concerned it continues without an error/warning, using a Hartree-Fock wave function and density. If this is the case, then we need to insert a stop so that this does not hap...
by kennethruud
16 Apr 2017, 14:35
Forum: Running Dalton
Topic: two photon- DOUBLE RESIDUE
Replies: 13
Views: 10674

Re: two photon- DOUBLE RESIDUE

Somewhat misleading title of your post. Anyway, try adding the keyword .DIPLEN after **QUADRATIC, assuming you want the transition dipole moments between excited states. *QUADRATIC .DOUBLE RESIDUE .DIPLEN .ROOTS 5 This will provide you with the necessary electric dipole operators needed to calculate...
by kennethruud
16 Apr 2017, 11:53
Forum: Running Dalton
Topic: two photon- DOUBLE RESIDUE
Replies: 13
Views: 10674

Re: two photon- DOUBLE RESIDUE

Replace ".DOUBLE RESIDUE" with ".TWO-PHOTON" and things should work fine (the two-photon transition moment is a single residue of the quadratic response function), see Chapter 11 in the Dalton manual. (I assume the title of your posting is correct, and that you are not looking for the excited-state ...
by kennethruud
20 Dec 2016, 08:17
Forum: Running Dalton
Topic: Error running DFT : Segmentation fault
Replies: 4
Views: 2583

Re: Error running DFT : Segmentation fault

As Peter, I do not exactly know what is going wrong, though I have two suggestions, one which gives you some hope and one which does not: 1) As Peter noted, it is a large DFT calculation and open-shell. I would have run such a calculation integral direct, either using .DIRECT or .PARALLEL (assuming ...
by kennethruud
19 Dec 2016, 10:51
Forum: Running Dalton
Topic: Error:(GPOPEN) TRYING TO OPEN A NON-EXISTING FILE AS OLD
Replies: 2
Views: 2126

Re: Error:(GPOPEN) TRYING TO OPEN A NON-EXISTING FILE AS OLD

You have specified .MOSTART NEWORB which suggests you are going to restart from orbitals available on the file SIRIUS.RST, which you then probably have not copied to your scratch directory. Either ensure this file is copied to the scratch directory or remove/comment these two lines of the input file...
by kennethruud
06 Dec 2016, 17:50
Forum: Running Dalton
Topic: error_run
Replies: 6
Views: 3202

Re: error_run

Since it would be such a great thing to have Peter acknowledge me to be telepathic :-), let me try an educated guess: Looking at the trace and your input file, my guess is that although in principle comments can be put anywhere in the input file, the keyword .DFT probably requires that the functiona...
by kennethruud
31 Oct 2016, 20:40
Forum: Running Dalton
Topic: Calculations with carbon-11 isotope
Replies: 1
Views: 2971

Re: Calculations with carbon-11 isotope

You can of course hack the subroutine DISOTP in the file abacus/hergp.F and add a fictitious carbon-11 isotope. However, as you are calculating a purely electronic property, this will have no effect on the calculated result, so I would just remove the isotopic specification. If you also intend to ca...
by kennethruud
26 Oct 2016, 09:52
Forum: Running Dalton
Topic: different compiler get different result(Two photon)?
Replies: 2
Views: 2991

Re: different compiler get different result(Two photon)?

Please note that you miss "Angstrom" in your non-ompi calculation.


Kenneth
by kennethruud
22 Oct 2016, 14:08
Forum: Running Dalton
Topic: Triplet optimization of water
Replies: 13
Views: 13147

Re: Triplet optimization of water

Open-shell species are in general not the strength of Dalton, largely because the authors do not do much studies of open-shell species, at least not without using MCSCF wave functions. Performance can therefore be less streamlined than other kinds of calculations. As regards how to resolve your conv...
by kennethruud
17 Oct 2016, 19:01
Forum: Running Dalton
Topic: Damped Cubic Response?
Replies: 3
Views: 3885

Re: Damped Cubic Response?

To the best of my knowledge, this would not be possible. There exists two implementations of damped two-photon absorption (which then becomes related to the damped cubic response function). One by Kristensen et al. (J. Chem. Phys., 134:214104, 2011) which is available through LSDalton (at least acco...