Physics Athens 2016

Basic Monte Carlo Steps

 Sample energy of photon created by electron

 Sample angles  and  between incoming electron and created photon

 Select distance to the first interaction

 Probability that the photon will travel a distance l without interaction is exp(- m l)



m dl is the probability to interact

 Probability to interact between l and l+dl is given by m exp(- m l) dl

l

 

s

l m



m





lP 

ds e

e  

m

1



0

1

1

l m



) ln(      r

r

e

l

r

1

) 1ln(

m

m