CH₂

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	5.80e-10	—
Mathis	3.90e-10	—
4000K	2.96e-09	—
10000K	1.28e-09	—
20000K	6.97e-10	—
Lyman-alpha	7.87e-12	—
Solar	3.46e-09	—
TW-Hya	3.70e-10	—
Cosmic ray UV	2.90e-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	1.61	2.35	0.62	2.11	[Download]	[Download]
Mathis	1.61	2.35	0.62	2.11	[Download]	[Download]
4000K	1.69	2.44	0.63	2.21	[Download]	[Download]
10000K	1.61	2.35	0.63	2.11	[Download]	[Download]
20000K	1.60	2.34	0.62	2.10	[Download]	[Download]
Lyman-alpha	2.11	2.97	0.58	2.70	[Download]	[Download]
Solar	1.71	2.46	0.63	2.23	[Download]	[Download]
TW-Hya	1.62	2.36	0.62	2.12	[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.]