spectra

2010-02-13 Thread Olga Smirnova
One obtains energy dispersive "powder difraction spectra" from CW according to lambda = 2d sin(theta). mailto:dr.o.smirn...@gmail.com

Re: diffraction patterns or spectra

2010-02-12 Thread Radovan Cerny
and I wonder if many of you share it... Best regards, Yaroslav ===8<==Original message text=== diffraction patterns are often referred to as diffraction spectra. But we all know that diffraction is not a spectroscopic technique. A spectrum refers to a wavelength-dispersiv

Re: diffraction patterns or spectra

2010-02-12 Thread Yaroslav Filinchuk, SNBL at ESRF
should avoid using the word >> "spectrum" for >> a diffraction pattern of any type. This is my view, with no references to >> books or >> Wikipedia, and I wonder if many of you share it... >> >> Best regards, >> Yaroslav >> >> >> ===8<=

Re: diffraction patterns or spectra

2010-02-12 Thread Yaroslav Filinchuk, SNBL at ESRF
Title: Re: diffraction patterns or spectra Dear Brian, to me spectroscopy sounds as a technique were an energy spectrum is used,  i.e. the light of different energies  has a different absorption coefficient (IR), or there is a different energy transfer for a fixed wavelength (Raman, INS, IXS

RE: diffraction patterns or spectra

2010-02-11 Thread Allen, Douglas R.
: diffraction patterns or spectra diffraction patterns are often referred to as diffraction spectra. But we all know that diffraction is not a spectroscopic technique. A spectrum refers to a wavelength-dispersive measurement, while CW diffraction is spatially resolved. Either diffraction pattern or

Re: diffraction patterns or spectra

2010-02-11 Thread Radovan Cerny
Daniel Chateigner a écrit : shall we say "spectra" is more general then ? since monocinetic measurements are never perfectly mono ? daniel We are allways working with idealized models ... Let's suppose that our monochromator is perfect! Radovan Radovan Cerny a écrit :

Re: diffraction patterns or spectra

2010-02-11 Thread Brian H. Toby
diffraction patterns are often referred to as diffraction spectra. But we all know that diffraction is not a spectroscopic technique. A spectrum refers to a wavelength-dispersive measurement, while CW diffraction is spatially resolved. Either diffraction pattern or diffractogram is the

Re: diffraction patterns or spectra

2010-02-11 Thread Daniel Chateigner
shall we say "spectra" is more general then ? since monocinetic measurements are never perfectly mono ? daniel Radovan Cerny a écrit : > For single energy (single wavelength) experiment the correct term is > "diffraction pattern". For multi energy (energy dis

R: diffraction patterns or spectra

2010-02-11 Thread Davide levy
Dear Alberto, I agree with you, but there are also 'great' professors of crystallography that say "powder diffraction spectra". Davide -Messaggio originale- Da: amar...@chimica.unige.it [mailto:amar...@chimica.unige.it] Inviato: giovedì 11 febbraio 2010 14.52

Re: diffraction patterns or spectra

2010-02-11 Thread Radovan Cerny
amine," which is from the same PIE root as spectrum. specter Radovan Lubomir Smrcok a écrit : Spectrum: from Latin >spectrum< appearance, specter, from >specere< to look, look at Lubo On Thu, 11 Feb 2010, amar...@chimica.unige.it wrote: Dear all, I see that in scientific

Re: diffraction patterns or spectra

2010-02-11 Thread Lubomir Smrcok
ferred to as diffraction spectra. But we all know that diffraction is not a spectroscopic technique. Should we pay more attention on this aspect when we write or refer a paper? What about? Best regards, Alberto

diffraction patterns or spectra

2010-02-11 Thread amartin
Dear all, I see that in scientific literature (also in high-impact factor scientific journals) the diffraction patterns are often referred to as diffraction spectra. But we all know that diffraction is not a spectroscopic technique. Should we pay more attention on this aspect when we write or