Talk:Klein-Nishina formula

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Good morning i'd like to know if someone here knows what's the Klein nishina effect??? because in all site i found "the famous KN effect" but noone told me what it is. The formula is wonderfull but i don't have time to study in detials this formula to found, or imagine, what could be this so famous effect. Please i need it quickly. send me a mail at giraudalexandre@homtmail.com if you can tell me what's this effect in few clearly and precisly words. :)

Thank you

Alex.

[edit] error in text

The text states that:

"The value dσ / dΩ is the probability that a photon will scatter into the solid angle defined by dΩ = 2πsinθdθ."

A differential cross section is not a probability. It is an effective area around a target particle that the scattered particle must enter in order to scatter into a given solid angle.

Wigcp 03:45, 25 July 2007 (UTC)