PH

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	5.78e-10	—
Mathis	3.77e-10	—
4000K	6.83e-11	—
10000K	4.20e-10	—
20000K	5.43e-10	—
Lyman-alpha	1.79e-11	—
Solar	5.85e-11	—
TW-Hya	3.20e-10	—
Cosmic ray UV	7.24e-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	1.71	2.48	0.58	2.21	[Download]	[Download]
Mathis	1.71	2.49	0.57	2.21	[Download]	[Download]
4000K	1.56	2.27	0.63	2.05	[Download]	[Download]
10000K	1.62	2.36	0.61	2.11	[Download]	[Download]
20000K	1.68	2.45	0.58	2.18	[Download]	[Download]
Lyman-alpha	2.11	2.97	0.58	2.70	[Download]	[Download]
Solar	1.57	2.30	0.62	2.06	[Download]	[Download]
TW-Hya	1.64	2.39	0.60	2.13	[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.]