l-C₄

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]
[Download cross section figure as pdf]

Photodissociation and ionisation rates (s^-1)

Radiation	Photodissociation	Photoionisation
ISRF	8.48e-09	—
Mathis	5.67e-09	—
4000K	5.42e-08	—
10000K	2.22e-08	—
20000K	1.10e-08	—
Lyman-alpha	7.87e-12	—
Solar	8.35e-08	—
TW-Hya	5.54e-09	—
Cosmic ray UV	1.78e-13	—

[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	1.52	2.22	0.64	2.00	[Download]	[Download]
Mathis	1.52	2.22	0.64	2.00	[Download]	[Download]
4000K	1.60	2.33	0.64	2.11	[Download]	[Download]
10000K	1.53	2.24	0.64	2.02	[Download]	[Download]
20000K	1.52	2.23	0.64	2.00	[Download]	[Download]
Lyman-alpha	2.11	2.97	0.58	2.70	[Download]	[Download]
Solar	1.65	2.40	0.63	2.17	[Download]	[Download]
TW-Hya	1.53	2.24	0.64	2.02	[Download]	[Download]

Photoionisation

Radiation	γE2	γexp	k0fit	γfit	Line data	Dust data
ISRF	-	-	-	-
Mathis	-	-	-	-
4000K	-	-	-	-
10000K	-	-	-	-
20000K	-	-	-	-
Lyman-alpha	-	-	-	-
Solar	-	-	-	-
TW-Hya	-	-	-	-

[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.]