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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 1.09e-10 0.00e+00
Mathis 8.50e-11 0.00e+00
4000K 1.03e-12 0.00e+00
10000K 2.36e-11 0.00e+00
20000K 1.04e-10 0.00e+00
Lyman-alpha 1.33e-10 0.00e+00
Solar 7.89e-12 0.00e+00
TW-Hya 1.05e-10 0.00e+00
Cosmic ray UV 9.66e-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 2.12 3.01 0.42 2.58 [Download] [Download]
Mathis 2.19 3.09 0.40 2.63 [Download] [Download]
4000K 1.60 2.33 0.62 2.09 [Download] [Download]
10000K 1.82 2.63 0.53 2.31 [Download] [Download]
20000K 2.15 3.04 0.41 2.59 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 2.06 2.93 0.49 2.57 [Download] [Download]
TW-Hya 2.10 2.96 0.53 2.64 [Download] [Download]

Photoionisation

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

[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.]