1st moment

[Graphics:SoftComptongr33.gif]

[Graphics:SoftComptongr34.gif]

This agrees with x=0 (&agr;=0) limit of eq (19) of Barbosa (1982)

Now average over &mgr;e

[Graphics:SoftComptongr35.gif]

[Graphics:SoftComptongr36.gif]

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