C2H4

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]
[Photodissociation cross section — separate lines and continuum]
[Photoionisation cross section — separate lines and continuum]
[Download cross section figure as pdf]

Photodissociation and ionisation rates (s-1)

Radiation Photodissociation Photoionisation
ISRF 3.06e-09 4.10e-10
Mathis 2.04e-09 3.20e-10
4000K 7.53e-10 1.64e-14
10000K 2.44e-09 3.73e-11
20000K 2.96e-09 3.71e-10
Lyman-alpha 3.71e-09 0.00e+00
Solar 7.94e-10 6.19e-12
TW-Hya 3.51e-09 8.10e-11
Cosmic ray UV 3.46e-13 2.84e-14

[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 1.70 2.49 0.54 2.19 [Download] [Download]
Mathis 1.71 2.50 0.54 2.19 [Download] [Download]
4000K 1.52 2.22 0.64 2.00 [Download] [Download]
10000K 1.57 2.29 0.62 2.05 [Download] [Download]
20000K 1.67 2.45 0.55 2.15 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.56 2.29 0.61 2.05 [Download] [Download]
TW-Hya 1.81 2.63 0.54 2.32 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 2.67 3.63 0.47 3.25 [Download] [Download]
Mathis 2.71 3.67 0.47 3.29 [Download] [Download]
4000K 2.35 3.26 0.55 2.96 [Download] [Download]
10000K 2.56 3.51 0.49 3.15 [Download] [Download]
20000K 2.72 3.69 0.47 3.31 [Download] [Download]
Lyman-alpha - - - -
Solar 2.83 3.81 0.46 3.42 [Download] [Download]
TW-Hya 2.75 3.71 0.47 3.33 [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.]