.. _physics-atomicRecombinationRateDielectronic:

Atomic Dielectronic Recombination Rates
=======================================

Class providing dielectronic recombination rate coefficients (in cm\ :math:`^3` s\ :math:`^{-1}`) for ions of given atomic number and electron number at a specified electron temperature. Dielectronic recombination proceeds via simultaneous capture of a free electron and excitation of a bound electron, followed by radiative stabilization; it dominates over radiative recombination at temperatures above :math:`\sim 10^5` K for many ions and is therefore a critical process in the ionization balance and cooling of hot collisionally ionized gas in the :term:`IGM` and :term:`CGM`.

**Default implementation:** ``atomicRecombinationRateDielectronicArnaud1985``

Methods
-------

``rate`` → ``double precision``
   Return the dielectronic recombination rate (in units of cm\ :math:`^3` s\ :math:`^{-1}`) for the ion of given ``atomicNumber`` and ``electronNumber`` at the given ``temperature`` (in Kelvin).

   * ``integer , intent(in ) :: atomicNumber, electronNumber``

   * ``double precision, intent(in ) :: temperature``

.. _physics-atomicRecombinationRateDielectronicArnaud1985:

``atomicRecombinationRateDielectronicArnaud1985``
-------------------------------------------------

Implements an atomic dielectronic recombination class which uses the fits from :cite:t:`aldrovandi_radiative_1973`, :cite:t:`shull_ionization_1982` and :cite:t:`arnaud_updated_1985`.

**(Default implementation)**

.. _physics-atomicRecombinationRateDielectronicZero:

``atomicRecombinationRateDielectronicZero``
-------------------------------------------

Implements an atomic dielectronic recombination class which assumes zero rate.