Re: [Wien] Magic angle for different edges in a sample
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 kevinjorissen...@gmail.com To: A Mailing list for WIEN2k users wien@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.nejatip...@yahoo.com wrote: Thank you dear Ciao From: Fecher, Gerhard fec...@uni-mainz.de To: A Mailing list for WIEN2k users wien@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-boun...@zeus.theochem.tuwien.ac.at [wien-boun...@zeus.theochem.tuwien.ac.at] im Auftrag von Hajar Nejati [hajar.nejatip...@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 fec...@uni-mainz.de To: A Mailing list for WIEN2k users wien@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-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.at [wien-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.at] im Auftrag von Hajar Nejati [hajar.nejatip...@yahoo.commailto:hajar.nejatip...@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@zeus.theochem.tuwien.ac.atmailto:Wien@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@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@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@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@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
Re: [Wien] Magic angle for different edges in a sample
Dear, You should read the following article: ELNES at magic angle conditions by Hébert et al. in Ultramicroscopy 106 (2006) 1139–1143. In particular, it gives the set of reduced incident and collection angles •/•E and •/•E for working in the magic angle conditions, where •E depends on both the acceleration voltage and the edge energy. Regards. De : wien-boun...@zeus.theochem.tuwien.ac.at [mailto:wien-boun...@zeus.theochem.tuwien.ac.at] De la part de Hajar Nejati Envoyé : mercredi 17 décembre 2014 09:11 À : A Mailing list for WIEN2k users Objet : Re: [Wien] Magic angle for different edges in a sample 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 kevinjorissen...@gmail.com To: A Mailing list for WIEN2k users wien@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.nejatip...@yahoo.commailto:hajar.nejatip...@yahoo.com wrote: Thank you dear Ciao From: Fecher, Gerhard fec...@uni-mainz.demailto:fec...@uni-mainz.de To: A Mailing list for WIEN2k users wien@zeus.theochem.tuwien.ac.atmailto:wien@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-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.at [wien-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.at] im Auftrag von Hajar Nejati [hajar.nejatip...@yahoo.commailto:hajar.nejatip...@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 fec...@uni-mainz.demailto:fec...@uni-mainz.de To: A Mailing list for WIEN2k users wien@zeus.theochem.tuwien.ac.atmailto:wien@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-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.at [wien-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.at] im Auftrag von Hajar Nejati [hajar.nejatip...@yahoo.commailto:hajar.nejatip...@yahoo.commailto:hajar.nejatip...@yahoo.commailto:hajar.nejatip...@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@zeus.theochem.tuwien.ac.atmailto:Wien@zeus.theochem.tuwien.ac.atmailto:Wien@zeus.theochem.tuwien.ac.atmailto:Wien@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
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.nejatip...@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 kevinjorissen...@gmail.com *To:* A Mailing list for WIEN2k users wien@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.nejatip...@yahoo.com wrote: Thank you dear Ciao -- *From:* Fecher, Gerhard fec...@uni-mainz.de *To:* A Mailing list for WIEN2k users wien@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-boun...@zeus.theochem.tuwien.ac.at [ wien-boun...@zeus.theochem.tuwien.ac.at] im Auftrag von Hajar Nejati [ hajar.nejatip...@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 fec...@uni-mainz.de To: A Mailing list for WIEN2k users wien@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-boun...@zeus.theochem.tuwien.ac.atmailto: wien-boun...@zeus.theochem.tuwien.ac.at [ wien-boun...@zeus.theochem.tuwien.ac.atmailto: wien-boun...@zeus.theochem.tuwien.ac.at] im Auftrag von Hajar Nejati [ hajar.nejatip...@yahoo.commailto:hajar.nejatip...@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@zeus.theochem.tuwien.ac.atmailto:Wien@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@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@zeus.theochem.tuwien.ac.at
Re: [Wien] Magic angle for different edges in a sample
Thank you so much I got the answer. The best From: Kevin Jorissen kevinjorissen...@gmail.com To: A Mailing list for WIEN2k users wien@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.nejatip...@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 kevinjorissen...@gmail.com To: A Mailing list for WIEN2k users wien@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.nejatip...@yahoo.com wrote: Thank you dear Ciao From: Fecher, Gerhard fec...@uni-mainz.de To: A Mailing list for WIEN2k users wien@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-boun...@zeus.theochem.tuwien.ac.at [wien-boun...@zeus.theochem.tuwien.ac.at] im Auftrag von Hajar Nejati [hajar.nejatip...@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 fec...@uni-mainz.de To: A Mailing list for WIEN2k users wien@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-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.at [wien-boun...@zeus.theochem.tuwien.ac.atmailto:wien-boun...@zeus.theochem.tuwien.ac.at] im Auftrag von Hajar Nejati [hajar.nejatip...@yahoo.commailto:hajar.nejatip...@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@zeus.theochem.tuwien.ac.atmailto:Wien@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@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] hi
Prof. Dr : Baaziz Hakim Physics Department , University of M’sila B.P 166 Route ICHBILLIA 28000 M'Sila Algeria Tel : 213 35 54 17 26 - Mobil : 213 771525993 ___ Wien mailing list Wien@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
