J/ApJ/779/97 Photodissociation of CN (el-Qadi+, 2013)
Photodissociation of CN.
el-Qadi W.H., Stancil P.C.
<Astrophys. J., 779, 97 (2013)>
=2013ApJ...779...97E 2013ApJ...779...97E
ADC_Keywords: Atomic physics
Keywords: ISM: molecules; molecular data; molecular processes;
photon-dominated region, PDR
Abstract:
CN rovibrational photodissociation cross sections have been computed
using ab initio derived potential curves and dipole transition moment
functions adjusted to match asymptotic experimental constraints where
available. Here, we report results for the electronic transitions
2Σ+(4)←X2Σ+, 2Σ+(5)←X2Σ+,
2Π(4)←X2Σ+, and 2Π(5)←X2Σ+. Partial
cross sections for transitions from all 5581 rovibrational levels
theoretically obtained for the ground electronic state X2Σ+
were computed for a wavelength range that extends from 500Å to the
dissociation threshold for each particular rovibrational state. Cross
sections assuming a thermal Boltzmann distribution of rovibrational
levels for gas temperatures between 500 to 5000 K are also obtained.
Applications of the results to ultraviolet irradiated environments are
discussed.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 20 2252 CN(v"=0,N"=0) photodissociation cross sections as
a function of wavelength for the four electronic
transitions
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See also:
J/ApJS/214/26 : Line lists for CN isotopes transitions (Sneden+, 2014)
J/ApJS/210/23 : Line intensities in CN transitions (Brooke+, 2014)
J/MNRAS/390/1733 : CN column densities & excitation temperatures (Slyk+, 2008)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 I1 --- I [1] Initial electronic state index (1)
3 I1 --- F [2/5] Final electronic state index (1)
5- 10 F6.1 0.1nm lambda [500/1093] Photon wavelength; Angstroms
12- 20 E9.4 100Mbarn Cross [0/2.3] Photodissociation cross section σ,
expressed in Å2 = 10-20m2 = 108barn
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Note (1): Electronic states (see table 1 in section 2.2 for further details):
1 = X2Σ+ (atomic states: C(2s22p23P)+N(2s22p34S0))
2 = 2Π(4) (atomic states: C(2s22p23P)+N(2s22p32P0)
3 = 2Σ+(4) (atomic states: C(2s22p21D)+N(2s22p32D0))
4 = 2Π(5) (atomic states: C(2s22p21D)+N(2s22p32D0))
5 = 2Σ+(5) (atomic states: C(2s22p21D)+N(2s22p32P0))
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 30-Apr-2015