Hi James,
Am 03.02.2009 um 17:38 schrieb James Holton:
Hey Dirk,
You're wrong. ;)
okay, thanks a lot! ;-)
The remarkable part of this is that the integrated spot intensity
(photons) is essentially invariant with how you divide up the unit
cells into mosaic domains. Well, okay, if
Dear James,
what an interesting discussion!
Am 30.01.2009 um 19:42 schrieb James Holton:
...
I think the coherence length is related to how TWO different photons
can interfere with each other, and this is a rare event indeed. It
has nothing to do with x-ray diffraction as we know it. No
was taking it to mean the total
number of photons in a spot (sometimes called the integrated intensity). Then
of course he is correct.
Colin
-Original Message-
From: CCP4 bulletin board on behalf of James Holton
Sent: Fri 30/01/2009 18:42
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] X-ray
After conversing with Bernhard a bit offline I think the relevant
question is:
How far apart can two electrons in the crystal be before their
scattering becomes incoherent ... as in no longer interfering with
each other in the way Bragg described.
The answer to this is about 10 um if the
of Ethan Merritt
Sent: Thu 29/01/2009 19:24
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] X-ray photon correlation length
On Thursday 29 January 2009 10:59:23 Bernhard Rupp wrote:
Ok, following seems to be correct:
a) interaction length = mean free path : relevant for absorption
b
Message-
From: owner-ccp...@jiscmail.ac.uk
[mailto:owner-ccp...@jiscmail.ac.uk] On Behalf Of Bernhard Rupp
Sent: 29 January 2009 18:59
To: 'Nave, C (Colin)'; CCP4BB@JISCMAIL.AC.UK
Subject: RE: [ccp4bb] X-ray photon correlation length
Ok, following seems to be correct
Ethan Merritt wrote:
My impression is that the coherence length from synchrotron sources
is generally larger than the x-ray path through a protein crystal.
But I have not gone through the exercise of plugging in specific
storage ring energies and undulator parameters to confirm this
impression.
I always wondered - how is the X-ray photon correlation length defined
and where do I find it? This is not the interaction length, I assume.
So, to the physicists: How large is the 'X-ray photon correlation length'
for a given wavelength in a given material?
I had the impression that
board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of
Bernhard Rupp
Sent: Thursday, January 29, 2009 9:51 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] X-ray photon correlation length
I always wondered - how is the X-ray photon correlation length defined
and where do I find
/cm4_28_020.pdf?request
-id=8848d3f0-5a4b-4ffe-8ea4-c1eabfaf1657
Cheers
Colin
From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of
Bernhard Rupp
Sent: 29 January 2009 17:51
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] X-ray photon correlation length
I
reasonable?
BR
From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of Nave,
C (Colin)
Sent: Thursday, January 29, 2009 10:14 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] X-ray photon correlation length
Bernard
I guess this came from
Aren't detwinning methods
From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of Nave,
C (Colin)
Sent: Thursday, January 29, 2009 10:14 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] X-ray photon correlation length
Bernard
I guess this came from
Aren't detwinning methods appropriate only
12 matches
Mail list logo
