Levels#

class fiasco.Levels(elvlc, index=None)[source]#

Data associated with all energy levels of an ion.

Warning

This is not meant to be instantiated directly, but rather accessed by indexing a fiasco.Ion object.

Parameters:

elvlc (DataIndexer) – Pointer to the energy level information for a given ion in the CHIANTI database.
index (int, slice, or array-like, optional) – Index or slice for which to extract energy level data.

Attributes Summary

`configuration`	Label denoting the electronic configuration.
`energy`	Energy of each level.
`is_observed`	True if the energy of the level is from laboratory measurements.
`label`	Label denoting level configuration, multiplicity, angular momentum label, and total angular momentum.
`level`	Index of each level.
`multiplicity`	Multiplicity, \(2S+1\)
`orbital_angular_momentum`	Orbital angular momentum number \(L\).
`orbital_angular_momentum_label`	Orbital angular momentum label.
`spin`	Spin, \(S\), of the electronic configuration.
`total_angular_momentum`	Total angular momentum number \(J\).
`weight`	Statistical weight, \(2J + 1\).

Attributes Documentation

energy#: Energy of each level. Defaults to observed energy and falls back to theoretical energy if no measured energy is available.

is_observed#: True if the energy of the level is from laboratory measurements.

label#: Label denoting level configuration, multiplicity, angular momentum label, and total angular momentum.