C2H2

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 2.41e-09 5.28e-10
Mathis 1.58e-09 4.15e-10
4000K 1.28e-10 5.21e-15
10000K 1.08e-09 4.01e-11
20000K 2.05e-09 4.91e-10
Lyman-alpha 8.67e-09 0.00e+00
Solar 4.22e-10 2.39e-11
TW-Hya 3.17e-09 1.67e-10
Cosmic ray UV 3.54e-13 3.83e-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 1.83 2.64 0.56 2.35 [Download] [Download]
Mathis 1.84 2.64 0.56 2.36 [Download] [Download]
4000K 1.58 2.31 0.63 2.08 [Download] [Download]
10000K 1.71 2.49 0.59 2.22 [Download] [Download]
20000K 1.81 2.61 0.57 2.33 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.85 2.67 0.55 2.37 [Download] [Download]
TW-Hya 2.02 2.86 0.56 2.57 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 2.91 3.92 0.50 3.58 [Download] [Download]
Mathis 2.93 3.95 0.50 3.60 [Download] [Download]
4000K 2.71 3.70 0.52 3.38 [Download] [Download]
10000K 2.87 3.88 0.50 3.54 [Download] [Download]
20000K 2.94 3.96 0.50 3.62 [Download] [Download]
Lyman-alpha - - - -
Solar 3.18 4.24 0.47 3.86 [Download] [Download]
TW-Hya 3.05 4.08 0.48 3.71 [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.]