Si

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 — 4.47e-09
Mathis — 2.94e-09
4000K — 9.29e-11
10000K — 2.04e-09
20000K — 3.91e-09
Lyman-alpha — 5.69e-09
Solar — 2.90e-10
TW-Hya — 4.38e-09
Cosmic ray UV — 4.16e-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 1.81 2.61 0.56 2.33 [Download] [Download]
Mathis 1.82 2.62 0.56 2.33 [Download] [Download]
4000K 1.68 2.43 0.61 2.18 [Download] [Download]
10000K 1.73 2.51 0.59 2.25 [Download] [Download]
20000K 1.80 2.60 0.56 2.31 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.97 2.80 0.55 2.51 [Download] [Download]
TW-Hya 2.00 2.83 0.56 2.54 [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.]