Especially, the crystallographers are interested
in everything concerning resonance scattering, which is
indeed a valid terminus technicus in natural sciences.
The question of Jacob is very interesting. We have to
distinguish between absorption cross section and
scattering cross section and
Ethan A Merritt wrote:
And please note that resonant scattering is not a standard term.
Resonant Scattering is now the standard term accepted and used
anywhere in the X-ray physics and crystallography literature, except in
protein crystallography.
It is the more adequate term since the
Dear All,
While we are talking about X-ray scattering, I have another question. If an
X-ray is elastically scattered from an electron at an angle theta, its energy
is the same is the incoming X-ray. However, the momentum is not the same, as it
now has a component in a perpendicular direction
you would find that it's conserved (it has to be in an
elastic collision).
-- Ian
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Murray, James W
Sent: 31 May 2007 10:30
To: CCP4BB@JISCMAIL.AC.UK
Subject: RE: [ccp4bb] Is anomalous signal
James,
At least for diffraction experiments; the photon scatters off of the
*crystal lattice*, not any individual electron, so you can conserve the
momentum of the photons and the macroscopic crystal without the crystal
recoiling too much.
Best,
Jon
Murray, James W wrote:
Dear All,
On jeudi 31 mai 2007, Murray, James W wrote:
While we are talking about X-ray scattering, I have another question. If an
X-ray is elastically scattered from an electron at an angle theta, its
energy is the same is the incoming X-ray. However, the momentum is not the
same, as it now has a
On Thursday 31 May 2007 01:37, Marc SCHILTZ wrote:
Ethan A Merritt wrote:
And please note that resonant scattering is not a standard term.
Resonant Scattering is now the standard term accepted and used
anywhere in the X-ray physics and crystallography literature, except in
protein
Dear Fellow Compatriots:
A few pre-coffee random observations from the field offices of Dr. Cranky:
1. No mention of Resonant Scattering in the index of JJ Sakurai Adv.
Quantum Mechanics (1967, 1987 revision), which I used in (blush) 1989,
although the phenomenon is discussed, with many
Dear Crystallographers,
The reason I called the phenomenon resonant scattering is because that is the
term used by
Elements of Modern X-ray Physics by Jens Als-Nielsen, Des McMorrow. I prefer
the term also
because this scattering is, as somebody has said, no longer really
anomalous-- it fits
Quoting Jacob Keller [EMAIL PROTECTED]:
The reason I called the phenomenon resonant scattering is because
that is the term used by
Elements of Modern X-ray Physics by Jens Als-Nielsen, Des
McMorrow. I prefer the term also
because this scattering is, as somebody has said, no longer really
==Original message text===
On Wed, 30 May 2007 6:51:09 pm CDT Ethan Merritt wrote:
On Wednesday 30 May 2007 16:24, Jacob Keller wrote:
I have been wondering recently whether the anomalous component of a
diffraction pattern is of a
different wavelength from the regular
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