Auger Photon Yields

When inner shell (or Auger) ionization takes place - there is a chance of photons being eected as the inner shells are re-filled. This data provies the information to compute the photons thus made. It is currently not used.

Source

This data comes from Kaastra and Mewe 1993, A&A, 97, 443 . The data is downloaded from the vizier site linked and put into a file called “fluorescent_yield.data”

Translation to Python format

The translation takes place using the python script “kaastra_2_py.py”. All identical to electron yield, but input file is “fluorescent_yield.data” and output is “kaastra_fluorescent_yield.data”

Data format

This is the data format of the electron yield data

Label	z	state	n	l	photon_energy(eV)	yield
Kphotyield	5	1	1	0	1.837e+02	6.000e-04
Kphotyield	5	1	1	0	1.690e+01	7.129e-01
Kphotyield	6	1	1	0	2.768e+02	2.600e-03

The data is linked to the correct inner shell photoionization cross section (and hence rate) via z, state, n shell and l subshell. The photon energy field is thew energy of the fluorescent photon in eV, and yield is the number of said photons emitted per ionization multiplied by \(10^4\).

Python structure

The data is stored in python in the inner_fluor_yield structure which contains

• int nion - Index to the ion which was the parent of the inner shell ionization

• int z, istate - element and ionization state of parent ion

• int n, l - Quantum numbers of shell

• double freq - the rest frequency of the photon emitted

• double yield - number of photons per ionization x \(10^4\)

Comments

This data is not currently used