&GAS: PARAMETERS
The number of nucleons per molecule.
This parameter is used only to compute the cluster size
distribution if you didn't enter such a distribution
yourself.
The most probable, not the mean, energy loss in eV per cm.
This parameter is used only to compute the cluster size
distribution if you didn't enter such a distribution
yourself or asked HEED to do this for you.
You may also type MOST-PROBABLE-ENERGY-LOSS.
The energy in eV needed to ionise a molecule.
This parameter is used only to compute the cluster size
distribution if you didn't enter such a distribution
yourself or asked HEED to do this for you.
You may also type PAIR-CREATION-ENERGY.
The average number of clusters per cm.
This parameter is used extensively, e.g. for the
calculation of arrival time distributions, for the
signal calculation and also to compute a cluster
size distribution if such a distribution was not
entered directly via a CLUSTER statement.
You may also type N-MEAN.
The density of the gas in g/cm**3.
This parameter is used only to compute the cluster size
distribution if you didn't enter such a distribution
yourself or asked HEED to do this for you.
The nuclear charge of the molecule.
This parameter is used only to compute the cluster size
distribution if you didn't enter such a distribution
yourself or asked HEED to do this for you.
The transverse and longitudinal diffusion coefficients for ions
of the type expected to be produced in your chamber, filled with
the gas being entered.
These coefficients are used for Monte Carlo drift line integration.
The diffusion coefficients should be expressed in cm of
diffusion for 1 cm of drift.
[Both diffusion coefficients default to 0.]
Keyword index.
Formatted on 10/11/98.