NH

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	5.75e-10	1.90e-12
Mathis	3.78e-10	2.95e-12
4000K	1.06e-11	0.00e+00
10000K	2.39e-10	0.00e+00
20000K	5.06e-10	0.00e+00
Lyman-alpha	4.88e-11	0.00e+00
Solar	1.66e-11	2.76e-12
TW-Hya	1.74e-10	1.02e-11
Cosmic ray UV	3.69e-14	7.10e-16

[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	1.83	2.63	0.54	2.33	[Download]	[Download]
Mathis	1.84	2.65	0.54	2.34	[Download]	[Download]
4000K	1.53	2.27	0.60	2.01	[Download]	[Download]
10000K	1.75	2.52	0.59	2.26	[Download]	[Download]
20000K	1.82	2.63	0.54	2.33	[Download]	[Download]
Lyman-alpha	2.11	2.97	0.58	2.70	[Download]	[Download]
Solar	1.58	2.36	0.54	2.06	[Download]	[Download]
TW-Hya	1.83	2.63	0.55	2.33	[Download]	[Download]

Photoionisation

Radiation	γE2	γexp	k0fit	γfit	Line data	Dust data
ISRF	3.24	4.34	0.51	4.00	[Download]	[Download]
Mathis	3.24	4.34	0.51	4.00	[Download]	[Download]
4000K	3.23	4.33	0.51	4.00	[Download]	[Download]
10000K	3.23	4.33	0.51	4.00	[Download]	[Download]
20000K	3.23	4.33	0.51	4.00	[Download]	[Download]
Lyman-alpha	-	-	-	-
Solar	3.36	4.48	0.49	4.13	[Download]	[Download]
TW-Hya	3.40	4.53	0.49	4.17	[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.]