Re: [ccp4bb] Is anomalous signal a different wavelength?

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CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

Previous message:
Subject: Re: Is anomalous signal a different wavelength?
From: Marc SCHILTZ marc {- dot -} schiltz {- at -} EPFL {- dot -} CH
Date: 2007-05-31

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Subject: Re: Is anomalous signal a different wavelength?
From: Ian Tickle I {- dot -} Tickle {- at -} ASTEX-THERAPEUTICS {- dot -} COM
Date: 2007-05-31

Subject: Re: Is anomalous signal a different wavelength?
From: "Murray, James W" j {- dot -} w {- dot -} murray {- at -} IMPERIAL {- dot -} AC {- dot -} UK
Date: 2007-05-31

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 (see fig below). As I don't believe that the conservation of momentum really is violated, what is the source of the discrepancy?

Contrast this with most textbook descriptions of Compton scattering, where the X-ray loses energy and the electron gains kinetic energy.

best wishes

James

X-ray --------> e-

Dr. James Murray
Biochemistry Building
Department of Biological Sciences
Imperial College London
London, SW7 2AZ
Tel: +44 (0)20 7594 5276

CCP4bb navigation

CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

Previous message:
Subject: Re: Is anomalous signal a different wavelength?
From: Marc SCHILTZ marc {- dot -} schiltz {- at -} EPFL {- dot -} CH
Date: 2007-05-31

Next message:
Subject: Re: Is anomalous signal a different wavelength?
From: Ian Tickle I {- dot -} Tickle {- at -} ASTEX-THERAPEUTICS {- dot -} COM
Date: 2007-05-31