Custom input file
The sections ENERGY_GRID
in the NON-SMOKERweb
offer additional flexibility for the experienced user. Use these
options with care. You should know what you are doing because changing
the default options will offer the possibility to extract additional
information while altering (and obscuring) the output of other
information at the same time. All options not explicitly set will
their default values. Without these sections all those options will
the default. Specifying an empty section (i.e. section headers present
but no options set within) is not allowed but a whole section can be
left out (this is done in the sample
). For a sample with all sections, see the full input file
- Detailed description:
- Energy grid:
- Section label:
- If this section is not present, NON-SMOKERweb
automatically chooses an energy grid of (c.m.) projectile energies
which is best suited for
integrating the cross sections to obtain the astrophysical reaction
rates for the used temperature grid. For instance, a denser grid is used
around channel openings where the cross section fluctuates more.
When one is only interested in comparing experimental and theoretical
cross sections, then it is sometimes better to use a simpler energy
grid. When this option is in effect, the code first uses its internal
grid for the calculation and then interpolates the results to obtain
the values on the specified grid.
There are two ways to specify different energy grids which are selected
by the labels EXPLICIT and GRID,
option labels have to appear before the first data in this section.
- Option EXPLICIT: Energies are
given explicitly, one per
line, in MeV. Up to 100 energies can be given, if there are more, then
the excess values will be ignored.
- Option GRID: Specification of
an energy grid. The
order of supplied values is en_start en_step (both in MeV). There can
be one line of this kind.
- Options EXPLICIT and GRID
cannot be mixed.
- Note 1: Be careful when plotting these results! When your step width is too large you may miss certain features of the cross sections (such as fluctuations due to channel openings)! Make sure your step width catches all interesting features. The best is to first make a calculation without this option to identify the energy regions which have to be handled with care.
- Note 2: The S-factors are computed from the original result and then also interpolated (separately from the cross sections). Therefore, there may be small numerical differences between the cross section and its corresponding S-factor at a given energy compared to the "true" S-factor for that cross section.
- Getting the result page may take longer with this option because the code has to finish all calculations before the interpolation is performed.
- Further options:
- Final remarks
- Do not forget to check your input file with the checker tool.
However, that program does
not check the validity of the
options within the OPTIONS section!
- Because of the complexity of the options and the
sensitivity of the
results to them, please check carefully what you are doing and do not
hesitate to contact the author!