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Cross sections

Cross section figure.


[An explanation of the cross sections in this database]
[All cross sections — variable wavelength scale]
[All cross sections — variable wavelength scale in binary hdf5 format]
[All cross sections — 0.1nm wavelength scale]
[Photoionisation cross section — separate lines and continuum]
[Download cross section figure as pdf]

Photodissociation and ionisation rates (s-1)

Radiation Photodissociation Photoionisation
ISRF — 4.39e-09
Mathis — 2.98e-09
4000K — 2.15e-08
10000K — 1.00e-08
20000K — 5.33e-09
Lyman-alpha — 1.37e-09
Solar — 2.14e-08
TW-Hya — 3.67e-09
Cosmic ray UV — 2.50e-13

[An explanation of the interstellar photo rates.]
[An explanation of the cosmic-ray induced photo rates.]
[An explanation of the radiation fields listed below.]
[Download all rates in a csv file.]

Shielding functions and fitted constants

Photodissociation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF - - - -
Mathis - - - -
4000K - - - -
10000K - - - -
20000K - - - -
Lyman-alpha - - - -
Solar - - - -
TW-Hya - - - -

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 1.62 2.36 0.62 2.12 [Download] [Download]
Mathis 1.62 2.36 0.62 2.12 [Download] [Download]
4000K 1.65 2.39 0.63 2.16 [Download] [Download]
10000K 1.60 2.33 0.63 2.11 [Download] [Download]
20000K 1.61 2.35 0.62 2.11 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.65 2.39 0.63 2.17 [Download] [Download]
TW-Hya 1.66 2.42 0.60 2.17 [Download] [Download]

[An explanation of the shielding functions and parameterisations.]
[Download all γ factors in a csv file.]
[Download all dust and line shielding functions in a zip file.]