[Wien] Magic angle for different edges in a sample

Wed Dec 17 13:26:25 CET 2014

Thank you so much
I got the answer.
The best
      From: Kevin Jorissen <kevinjorissenpdx at gmail.com>
 To: A Mailing list for WIEN2k users <wien at zeus.theochem.tuwien.ac.at> 
 Sent: Wednesday, December 17, 2014 3:34 AM
 Subject: Re: [Wien] Magic angle for different edges in a sample

Hi Hajar,
The edge energies are ~800% different, and the magic angles will also be ~800% different.  It will be completely impossible to have both edges within magic angle in the same experiment.  Although that is likely a theoretical problem, as I don't think people usually measure EELS up to 10,000 eV.  That's more X-ray regime.  (There is also a so-called "magic angle" in x-ray absorption spectroscopy, but it's something completely different from the magic angle in EELS.)

I highly recommend the Hebert paper (2006).  The Sun and Yuan paper is also good but (my memory may be wrong on this) it may contain a mistake in some of the algebra, whereas the Hebert paper is definitely relativistically correct.
Cheers
Kevin

On Wed, Dec 17, 2014 at 9:11 AM, Hajar Nejati <hajar.nejatipoor at yahoo.com> wrote:

Dear Kevin
Thank you for your reply
For example, the energy loss of K- and L-edge of a Zn atom in ZnS are 9670 and 1043 eV, respectively.Can one expect the magic angle for K- and L-edge belonged to a Zn atom to be the same?

   From: Kevin Jorissen <kevinjorissenpdx at gmail.com>
 To: A Mailing list for WIEN2k users <wien at zeus.theochem.tuwien.ac.at> 
 Sent: Tuesday, December 16, 2014 3:54 AM
 Subject: Re: [Wien] Magic angle for different edges in a sample

It's a function of the energy loss.  If the L and K edge belong to different elements and are at approximately the same energy loss, then they will have approximately the same magic angle.

On Tue, Dec 16, 2014 at 12:00 PM, Hajar Nejati <hajar.nejatipoor at yahoo.com> wrote:

Thank you dear Ciao
      From: "Fecher, Gerhard" <fecher at uni-mainz.de>
 To: A Mailing list for WIEN2k users <wien at zeus.theochem.tuwien.ac.at> 
 Sent: Tuesday, December 16, 2014 1:34 AM
 Subject: Re: [Wien] Magic angle for different edges in a sample

maybe you should read
Phys. Rev. B 71, 125109 (2005)
by Y. Sun and J. Yuan

Ciao
Gerhard

DEEP THOUGHT in D. Adams; Hitchhikers Guide to the Galaxy:
"I think the problem, to be quite honest with you,
is that you have never actually known what the question is."

====================================
Dr. Gerhard H. Fecher
Institut of Inorganic and Analytical Chemistry
Johannes Gutenberg - University
55099 Mainz
and
Max Planck Institute for Chemical Physics of Solids
01187 Dresden
________________________________________
Von: wien-bounces at zeus.theochem.tuwien.ac.at [wien-bounces at zeus.theochem.tuwien.ac.at] im Auftrag von Hajar Nejati [hajar.nejatipoor at yahoo.com]
Gesendet: Dienstag, 16. Dezember 2014 08:45
An: A Mailing list for WIEN2k users
Betreff: Re: [Wien] Magic angle for different edges in a sample

dear Gerhard

My mean of magic angle is a collection semi-angle in the ELNES spectrum that gives rise to the orientation-independent spectrum.

________________________________
From: "Fecher, Gerhard" <fecher at uni-mainz.de>
To: A Mailing list for WIEN2k users <wien at zeus.theochem.tuwien.ac.at>
Sent: Monday, December 15, 2014 11:27 PM
Subject: Re: [Wien] Magic angle for different edges in a sample

what do you mean with "magic angle" ?
Do you mean the angle where the second Legendre polynonial vanishes ?

Ciao
Gerhard

DEEP THOUGHT in D. Adams; Hitchhikers Guide to the Galaxy:
"I think the problem, to be quite honest with you,
is that you have never actually known what the question is."

====================================
Dr. Gerhard H. Fecher
Institut of Inorganic and Analytical Chemistry
Johannes Gutenberg - University
55099 Mainz
and
Max Planck Institute for Chemical Physics of Solids
01187 Dresden
________________________________________

Von: wien-bounces at zeus.theochem.tuwien.ac.at<mailto:wien-bounces at zeus.theochem.tuwien.ac.at> [wien-bounces at zeus.theochem.tuwien.ac.at<mailto:wien-bounces at zeus.theochem.tuwien.ac.at>] im Auftrag von Hajar Nejati [hajar.nejatipoor at yahoo.com<mailto:hajar.nejatipoor at yahoo.com>]
Gesendet: Dienstag, 16. Dezember 2014 08:10
An: A. Mailing List for WIEN2k Users
Betreff: [Wien] Magic angle for different edges in a sample

Hi dear wien2k developers

I have a question about the magic angle:

Are the magic angles for K-edge and L-edge equal together or are different, in a sample?

_______________________________________________
Wien mailing list
Wien at zeus.theochem.tuwien.ac.at<mailto:Wien at zeus.theochem.tuwien.ac.at>
http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
SEARCH the MAILING-LIST at:  http://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/index.html

_______________________________________________
Wien mailing list
Wien at zeus.theochem.tuwien.ac.at
http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
SEARCH the MAILING-LIST at:  http://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/index.html

_______________________________________________
Wien mailing list
Wien at zeus.theochem.tuwien.ac.at
http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
SEARCH the MAILING-LIST at:  http://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/index.html

_______________________________________________
Wien mailing list
Wien at zeus.theochem.tuwien.ac.at
http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
SEARCH the MAILING-LIST at:  http://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/index.html

_______________________________________________
Wien mailing list
Wien at zeus.theochem.tuwien.ac.at
http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
SEARCH the MAILING-LIST at:  http://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/index.html

_______________________________________________
Wien mailing list
Wien at zeus.theochem.tuwien.ac.at
http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
SEARCH the MAILING-LIST at:  http://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/index.html

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://zeus.theochem.tuwien.ac.at/pipermail/wien/attachments/20141217/e7dfa29b/attachment-0001.html>