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 <[email protected]> a écrit :
> For single energy (single wavelength) experiment the correct term is
> "diffraction pattern". For multi energy (energy dispersive, ToF)
> experiment, the correct term is "diffraction spectrum".
>
> From http://www.etymonline.com/ :
>
> pattern (n.)
> 1324, "the original proposed to imitation; the archetype; that which
> is to be copied; an exemplar" [Johnson], from O.Fr. patron, from M.L.
> patronus (see patron). Extended sense of "decorative design" first
> recorded 1582, from earlier sense of a "patron" as a model to be
> imitated. The difference in form and sense between patron and pattern
> wasn't firm till 1700s. Meaning "model or design in dressmaking"
> (especially one of paper) is first recorded 1792, in Jane Austen.
> Verb phrase pattern after "take as a model" is from 1878.
>
> spectrum
> 1611, "apparition, specter," from L. spectrum "appearance, image,
> apparition," from specere "to look at, view" (see scope (1)). Meaning
> "band of colors formed from a beam of light" first recorded 1671.
> Spectroscope (1861) is a hybrid, with Gk. -skopion, from skopein "to
> look at, examine," 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, [email protected] wrote:
>>
>>> 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 refer
a paper?
>>> What about?
>>>
>>> Best regards,
>>> Alberto
>>>
>>>
>>>
>>>
>
>
> --
> Radovan Cerny
> Laboratoire de Cristallographie
> 24, quai Ernest-Ansermet
> CH-1211 Geneva 4, Switzerland
> Phone : [+[41] 22] 37 964 50, FAX : [+[41] 22] 37 961 08
> mailto : [email protected]
> URL : http://www.unige.ch/sciences/crystal/cerny/rcerny.htm
>
>
>
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--
Radovan Cerny
Laboratoire de Cristallographie
24, quai Ernest-Ansermet
CH-1211 Geneva 4, Switzerland
Phone : [+[41] 22] 37 964 50, FAX : [+[41] 22] 37 961 08
mailto : [email protected]
URL : http://www.unige.ch/sciences/crystal/cerny/rcerny.htm
