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reflect changes to resonance_scattering defaults

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walshjon 2014-04-07 18:28:28 -04:00
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docs/source/usersguide/input.rst
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@ -250,15 +250,16 @@ attributes or sub-elements:
``nuclide`` sub-element of the ``material`` element in ``materials.xml``,
of the nuclide to which a resonance scattering treatment is to be applied.
The ``method`` attribute gives the type of resonance scattering treatment
that is to be applied to the ``nuclide``. Acceptable inputs for the
``method`` attribute are ``ARTS``, ``CXS``, ``WCM``, and ``DBRC``.
Descriptions of each of these methods are documented here_. The
``xs_label`` attribute gives the label for the cross section data of the
``nuclide`` at a given temperature. The ``xs_label_0K`` gives the label
for the 0 K cross section data for the ``nuclide``. The ``E_min`` attribute
gives the minimum energy above which the ``method`` is applied. The
``E_max`` attribute gives the maximum energy below which the ``method`` is
applied. One example would be as follows:
that is to be applied to the ``nuclide``. Acceptable inputs - none of
which are case-sensitive - for the ``method`` attribute are ``ARTS``,
``CXS``, ``WCM``, and ``DBRC``. Descriptions of each of these methods
are documented here_. The ``xs_label`` attribute gives the label for the
cross section data of the ``nuclide`` at a given temperature. The
``xs_label_0K`` gives the label for the 0 K cross section data for the
``nuclide``. The ``E_min`` attribute gives the minimum energy above
which the ``method`` is applied. The ``E_max`` attribute gives the
maximum energy below which the ``method`` is applied. One example would
be as follows:
.. _here: http://dx.doi.org/10.1016/j.anucene.2014.01.017
@ -283,15 +284,17 @@ attributes or sub-elements:
</scatterer>
</resonance_scattering>
.. note:: The free gas, constant cross section (``cxs``) scattering model,
which has historically been used by Monte Carlo codes to sample
target velocities, is the default ``method``. Below ``E_min``,
the ``cxs`` default method is applied and above ``E_max``, the
target-at-rest (asymptotic) kernel is used. An arbitrary number of
``scatterer`` elements may be specified, each corresponding to a
single nuclide at a single material temperature.
.. note:: If the ``resonance_scattering`` element is not given, the free gas,
constant cross section (``cxs``) scattering model, which has
historically been used by Monte Carlo codes to sample target
velocities, is used to treat the target motion of all nuclides. If
``resonance_scattering`` is present, the ``cxs`` method is applied
below ``E_min`` and the target-at-rest (asymptotic) kernel is used
above ``E_max``. An arbitrary number of ``scatterer`` elements may
be specified, each corresponding to a single nuclide at a single
temperature.
*Default*: None
*Defaults*: None (scatterer), ARTS (method), 0.01 eV (E_min), 1.0 keV (E_max)
``<run_cmfd>`` Element
----------------------