C₂H₂

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	2.41e-09	5.28e-10
Mathis	1.58e-09	4.15e-10
4000K	1.29e-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.]