Transitions#

class fiasco.Transitions(levels, wgfa, n_levels=None)[source]#

An object for holding atomic transition data from CHIANTI.

Warning

This is not meant to be instantiated directly, but rather accessed through fiasco.Ion.transitions.

Parameters:

levels (Levels) – Data structure holding information about all of the energy levels for a given ion in the CHIANTI database.
wgfa (DataIndexer) – Table of transition information for a given ion in the CHIANTI database.
n_levels (int, optional) – Maximum number of levels in the CHIANTI atomic model. This is used to appropriately limit the transition information to the size of the atomic model. Typically, this is calculated by fiasco.Ion.n_levels.

Attributes Summary

`A`	Spontaneous transition probability due to radiative decay
`delta_energy`	Energy spacing between the upper and lower level of the transition.
`is_autoionization`	True if the transition corresponds to an autoionization.
`is_bound_bound`	True for bound-bound transitions.
`is_observed`	True for transitions that connect two observed energy levels
`is_twophoton`	True if the transition is a two-photon decay
`label`	Labels of upper and lower energy levels for each transition.
`lower_configuration`	Configuration of the lower level of the transition.
`lower_label`	Label of the lower level of the transition.
`lower_level`	Index of the lower level of the transition.
`upper_configuration`	Configuration of the upper level of the transition.
`upper_label`	Label of the upper level of the transition.
`upper_level`	Index of the upper level of the transition.
`wavelength`	Wavelength of each transition.

Attributes Documentation

delta_energy#: Energy spacing between the upper and lower level of the transition.

is_autoionization#: True if the transition corresponds to an autoionization.