K

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 — 3.89e-11
Mathis — 2.60e-11
4000K — 3.67e-10
10000K — 5.88e-11
20000K — 4.02e-11
Lyman-alpha — 3.50e-11
Solar — 4.17e-10
TW-Hya — 4.03e-11
Cosmic ray UV — 3.37e-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 2.48 0.56 2.19 [Download] [Download]
Mathis 1.71 2.49 0.56 2.20 [Download] [Download]
4000K 1.45 2.16 0.63 1.93 [Download] [Download]
10000K 1.60 2.34 0.62 2.10 [Download] [Download]
20000K 1.67 2.44 0.58 2.17 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.49 2.23 0.61 1.98 [Download] [Download]
TW-Hya 1.77 2.57 0.55 2.28 [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.]