NH

Cross sections

Cross section figure.


[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.]