C₃

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	4.97e-09	1.36e-10
Mathis	3.19e-09	1.15e-10
4000K	6.53e-10	9.03e-16
10000K	4.34e-09	9.67e-12
20000K	4.93e-09	1.36e-10
Lyman-alpha	2.17e-09	0.00e+00
Solar	5.85e-10	3.55e-12
TW-Hya	4.17e-09	3.33e-11
Cosmic ray UV	6.88e-13	8.93e-15

[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	1.64	2.39	0.61	2.14	[Download]	[Download]
Mathis	1.64	2.39	0.61	2.14	[Download]	[Download]
4000K	1.56	2.29	0.63	2.06	[Download]	[Download]
10000K	1.61	2.34	0.62	2.10	[Download]	[Download]
20000K	1.63	2.38	0.61	2.13	[Download]	[Download]
Lyman-alpha	2.11	2.97	0.58	2.70	[Download]	[Download]
Solar	1.59	2.33	0.61	2.08	[Download]	[Download]
TW-Hya	1.69	2.46	0.58	2.19	[Download]	[Download]

Photoionisation

Radiation	γE2	γexp	k0fit	γfit	Line data	Dust data
ISRF	3.00	4.03	0.50	3.68	[Download]	[Download]
Mathis	3.03	4.07	0.49	3.72	[Download]	[Download]
4000K	2.75	3.73	0.51	3.40	[Download]	[Download]
10000K	2.96	3.99	0.49	3.64	[Download]	[Download]
20000K	3.03	4.07	0.50	3.72	[Download]	[Download]
Lyman-alpha	-	-	-	-
Solar	3.09	4.14	0.50	3.80	[Download]	[Download]
TW-Hya	3.03	4.07	0.50	3.72	[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.]