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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]
[Download cross section figure as pdf]

Photodissociation and ionisation rates (s-1)

Radiation Photodissociation Photoionisation
ISRF 5.34e-11
Mathis 3.44e-11
4000K 3.33e-12
10000K 3.67e-11
20000K 5.03e-11
Lyman-alpha 2.78e-11
Solar 3.50e-12
TW-Hya 4.47e-11
Cosmic ray UV 6.04e-15

[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 1.70 2.47 0.59 2.21 [Download] [Download]
Mathis 1.70 2.47 0.59 2.21 [Download] [Download]
4000K 1.62 2.35 0.62 2.12 [Download] [Download]
10000K 1.65 2.40 0.61 2.16 [Download] [Download]
20000K 1.69 2.45 0.60 2.19 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.70 2.47 0.58 2.20 [Download] [Download]
TW-Hya 1.73 2.52 0.57 2.24 [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.]