Exercise 4.1-1

Lifetime of Positrons

Show that the solution of the differential equations for the positron concentrations n1 and n2
 
dn1
dt  		 =  – (λ1  +  ν · cV) · n1
     
dn2
dt  		 =  – λ2 · n2 + ν · cV · n1
 
leads to the following formula for the average lifetime
 
τ   = τ1  ·  ( 1  +  τ2 · ν · cV
1  +  τ1 · ν · cV		 )
 

     
 

Link to the Solution
   

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