I am interesting of this topic. I would like to recieve a detailed paper of this issue.
Dr. Tasos Gadis Athens University Αρχικό μήνυμα από "Kern, Arnt A." <[EMAIL PROTECTED]>: > Dear Angel, > > the instrument profile is the convolution product of the source emission > profile and various instrument contributions. For lab diffractometers the > source emission profile has a Lorentzian type shape. Particularily for > Bragg-Brentano type diffractometers, at low angles, the instrument function > shape is dominated by the detector slit, which can be sufficiently > approximated by a hat (impulse) function. The convolution product of the > source emission profile and the detector slit contribution looks > Gaussian-like, but a Gaussian is not an ideal approximation for this. At > higher angles the source emission profile dominates, thats why the instrument > function is more Lorentzian type. > > I can offer you a detailed paper about this issue, please let me know if you > would like to receive it. > > Cheers, > > Arnt > > -----Ursprόngliche Nachricht----- > Von: Angel L. Ortiz [mailto:[EMAIL PROTECTED] > Gesendet: Mittwoch, 6. Oktober 2004 12:44 > An: [EMAIL PROTECTED] > Betreff: shape of the instrumental profiles > > > > Dear colleagues: > > > > Does anyone know why the instrumental profiles (instrumental resolution) are > generally Gaussian for low diffraction angles, whereas turns to Lorentzian > for high diffraction angles?. > > > > Any advice is greatly appreciated. > > > > Thanks in advance, > > > > Prof. Angel L. Ortiz > > > > ********************************************************************** > Der Inhalt dieser E-Mail ist vertraulich und ausschliesslich fuer den > bezeichneten Adressaten bestimmt. Wenn Sie nicht der vorgesehene Adressat > dieser E-Mail oder dessen Vertreter sein sollten, so beachten Sie bitte, dass > jede Form der Kenntnisnahme, Veroeffentlichung, Vervielfaeltigung oder > Weitergabe des Inhalts dieser E-Mail unzulaessig ist. Wir bitten Sie, sich in > diesem Fall mit dem Absender der E-Mail in Verbindung zu setzen. > > The information contained in this email is confidential. It is intended > solely for the addressee. Access to this email by anyone else is > unauthorized. If you are not the intended recipient, any form of disclosure, > reproduction, distribution or any action taken or refrained from in reliance > on it, is prohibited and may be unlawful. Please notify the sender > immediately. > > ********************************************************************** > > --
