Post on 01-Jan-2016
description
No.4
xx+dxx=0n A v ~10-20m2dx
vvdxx
x=00x
(a0=5.29x10-11m10-20m22
xx+dxmfp
1:
10-16s
before collisionafter collisionm1m1m2m2v1v2v1v2
before collisionafter collisionm1m1m2m2v1v2v1v2vr
or ()
()
Q dWAB
ABAB
before collisionafter collision
before collisionafter collisionm2m1m2
=(3/2)T1(m1)(m2) m2/m1 (m2/m1 > 1000)
(r0
90o x
90Coulomb logarithm10
From ChenlnL 10 n:D:
ldelectronionelectronelectron