Subroutines

CALL GDRPRT (IPART,IMATE,STEP,NPOINT)

IPART

( INTEGER) GEANT particle number;

IMATE

( INTEGER) GEANT material number;

STEP

( REAL) step in cm;

NPOINT

( INTEGER) number of logarithmically spaced energy points between EKMIN (default 10 keV) and EKMAX (default 10 TeV). See [BASE040] for more information on these value and how to change them with the ERAN input record;

This routine calculates and prints the relevant parameters relative to the simulation of energy loss fluctuations due to ionisation and $\delta$ -ray production in STEP cm:

N d-rays

average number of $\delta$ -rays produced;

dE/I

average energy loss divided by the average ionisation potential;

xi/I

variable $\xi /I$ of the Landau/Vavilov theory;

xi/Emax

variable $\xi /E$_Max of the Landau/Vavilov theory;

regime

valid model to simulate energy loss fluctuations. Possible values are:

Gauss

Gauss distribution;

Vavilov

Vavilov distribution;

Landau

Landau distribution;

Urbán

GLANDZ routine of Urban (see [PHYS332]);

ASHO

atomic harmonic oscillator approximation (see [PHYS334]);

PAI

Photo-Absorption Ionisation model (see [PHYS334]);

This routine has no action on the GEANT system. It is intended as a help to users understanding the model which GEANT may be asked to use, for instance via the routine GSTPAR [CONS210].