L0_2016_Athens_Physics_Programme_V6

330-331 / 3107

Consider parallel beam from certain direction
(without loss of generality)
cross-section O [m2] of V
Intermezzo to introduce ionometric standards (III)
V in medium of mass
electron passingper V in loss energy mean V passing electrons #
) (

 PD
P
V
d
dx
dE
O)P(
)P(D
c

   

c
c
) /S()P( dx
dE
)P(
)P(D   



(P)
O
V
d 