C₂H₄

Cross sections

[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	8.11e-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.]