HCN

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	1.64e-09	4.39e-13
Mathis	1.16e-09	7.08e-13
4000K	5.73e-12	4.64e-20
10000K	2.81e-10	4.22e-15
20000K	1.32e-09	9.83e-14
Lyman-alpha	5.35e-09	0.00e+00
Solar	2.10e-10	7.46e-12
TW-Hya	3.26e-09	2.79e-11
Cosmic ray UV	1.98e-13	1.42e-15

[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	2.23	3.12	0.49	2.77	[Download]	[Download]
Mathis	2.25	3.15	0.49	2.79	[Download]	[Download]
4000K	1.61	2.35	0.61	2.10	[Download]	[Download]
10000K	1.99	2.83	0.51	2.50	[Download]	[Download]
20000K	2.23	3.12	0.48	2.75	[Download]	[Download]
Lyman-alpha	2.11	2.97	0.58	2.70	[Download]	[Download]
Solar	2.10	2.96	0.56	2.68	[Download]	[Download]
TW-Hya	2.12	2.98	0.57	2.70	[Download]	[Download]

Photoionisation

Radiation	γE2	γexp	k0fit	γfit	Line data	Dust data
ISRF	3.24	4.34	0.51	4.01	[Download]	[Download]
Mathis	3.24	4.34	0.51	4.01	[Download]	[Download]
4000K	3.23	4.33	0.51	3.99	[Download]	[Download]
10000K	3.23	4.33	0.51	3.99	[Download]	[Download]
20000K	3.23	4.33	0.51	3.99	[Download]	[Download]
Lyman-alpha	-	-	-	-
Solar	3.39	4.51	0.49	4.16	[Download]	[Download]
TW-Hya	3.42	4.55	0.49	4.19	[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.]