Update input

Author: giadarol

doc/reference/reference.pdf

@@ -684,6 +684,7 @@ \subsection{Beam parameters}
 \item	'e1': float, $e_1$.
 \item	'e2': float, $e_2$.
 \item	'sigmaE': float, $\sigma_e$.
+\item   ''theta\_e\_max': float, value to which the incidence angle is limited when computing the angular dependence for backscattered electrons.
 \end{enumerate}\\
 \hline
 Parameters for rediffused electrons\\
@@ -695,6 +696,7 @@ \subsection{Beam parameters}
 \item	'q': float, $q$.
 \item	'r1': float, $r_1$.
 \item	'r2': float, $r_2$.
+\item   ''theta\_e\_max': float, value to which the incidence angle is limited when computing the angular dependence for rediffused electrons.
 \end{enumerate}\\
 \hline
 Parameters for true secondaries. To be specified in furman\_pivi\_surface.