l-C₄H

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	3.66e-09	—
Mathis	2.34e-09	—
4000K	7.45e-10	—
10000K	3.30e-09	—
20000K	3.66e-09	—
Lyman-alpha	7.87e-12	—
Solar	6.75e-10	—
TW-Hya	1.23e-09	—
Cosmic ray UV	6.08e-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	1.62	2.36	0.62	2.12	[Download]	[Download]
Mathis	1.62	2.36	0.62	2.12	[Download]	[Download]
4000K	1.59	2.31	0.64	2.09	[Download]	[Download]
10000K	1.59	2.32	0.62	2.08	[Download]	[Download]
20000K	1.61	2.35	0.62	2.11	[Download]	[Download]
Lyman-alpha	2.11	2.97	0.58	2.70	[Download]	[Download]
Solar	1.59	2.32	0.64	2.09	[Download]	[Download]
TW-Hya	1.60	2.34	0.62	2.10	[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.]