J/ApJ/851/59 Inelastic calcium-hydrogen collision data (Belyaev+, 2017)
Atomic data on inelastic processes in calcium-hydrogen collisions.
Belyaev A.K., Voronov Y.V., Yakovleva S.A., Mitrushchenkov A., Guitou M.,
Feautrier N.
<Astrophys. J., 851, 59-59 (2017)>
=2017ApJ...851...59B 2017ApJ...851...59B (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data; atomic processes; scattering; stars: abundances
Abstract:
Inelastic cross sections and rate coefficients in Ca+H and Ca++H-
collisions for all transitions between the 17 lowest covalent states
plus one ionic molecular state are calculated based on the most recent
ab initio adiabatic potentials for the 11 lowest molecular states, as
well as on the model asymptotic potentials for higher-lying states,
including the ground ionic molecular state. Nuclear dynamics is
treated by the probability-current method and the multichannel
formulas for the collision energy range 0.01-100eV. The rates are
computed for mutual neutralization, ion-pair formation, and
(de-)excitation processes for the temperature range T=1000-10000K. The
calculations single out the partial processes with large and moderate
rate coefficients. The largest rates correspond to the mutual
neutralization into the Ca(4s5s3S), Ca(4s5p3P0), Ca(4s5s1S),
and Ca(4s5p1P0) final states; at T=6000K the largest value is
5.50x10-8cm3/s for Ca(4s5s3S). Among the (de-)excitation
processes, the largest rate coefficient corresponds to the
Ca(4s5s1S)->Ca(4s5s3S) transition; at T=6000K, the largest rate
has the value of 8.46x10-9cm3/s.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rc_1000.dat 190 18 Rate coefficients at T=1000K
rc_2000.dat 190 18 Rate coefficients at T=2000K
rc_3000.dat 190 18 Rate coefficients at T=3000K
rc_4000.dat 190 18 Rate coefficients at T=4000K
rc_5000.dat 190 18 Rate coefficients at T=5000K
rc_6000.dat 190 18 Rate coefficients at T=6000K
rc_7000.dat 190 18 Rate coefficients at T=7000K
rc_8000.dat 190 18 Rate coefficients at T=8000K
rc_9000.dat 190 18 Rate coefficients at T=9000K
rc_10000.dat 190 18 Rate coefficients at T=10000K
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See also:
J/A+A/606/A147 : Heavy particle-hydrogen collisions (Belyaev+, 2017)
J/A+A/593/A27 : Inelastic beryllium-hydrogen collision data (Yakovleva+, 2016)
J/A+A/587/A114 : Inelastic calcium-hydrogen collision data (Belyaev+, 2016)
J/A+A/572/A103 : Inelastic silicon-hydrogen collision data (Belyaev+, 2014)
J/ApJ/778/56 : Hamburg/ESO Survey extremely metal-poor stars (Cohen+, 2013)
Byte-by-byte Description of file: rc*
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Bytes Format Units Label Explanations
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1- 10 A10 --- State Initial state of Ca in collisions with H or
ionic state
11- 20 E10.2 cm+3/s RC1 ?=- Rate coefficient for transition to state
4s2 1S
21- 30 E10.2 cm+3/s RC2 ?=- Rate coefficient for transition to state
4s4p 3P
31- 40 E10.2 cm+3/s RC3 ?=- Rate coefficient for transition to state
3d4s 3D
41- 50 E10.2 cm+3/s RC4 ?=- Rate coefficient for transition to state
3d4s 1D
51- 60 E10.2 cm+3/s RC5 ?=- Rate coefficient for transition to state
4s4p 1P
61- 70 E10.2 cm+3/s RC6 ?=- Rate coefficient for transition to state
4s5s 3S
71- 80 E10.2 cm+3/s RC7 ?=- Rate coefficient for transition to state
4s5s 1S
81- 90 E10.2 cm+3/s RC8 ?=- Rate coefficient for transition to state
3d4p 3F
91-100 E10.2 cm+3/s RC9 ?=- Rate coefficient for transition to state
4s5p 3P
101-110 E10.2 cm+3/s RC10 ?=- Rate coefficient for transition to state
4s5p 1P
111-120 E10.2 cm+3/s RC11 ?=- Rate coefficient for transition to state
4s4d 1D
121-130 E10.2 cm+3/s RC12 ?=- Rate coefficient for transition to state
4s4d 3D
131-140 E10.2 cm+3/s RC13 ?=- Rate coefficient for transition to state
3d4p 3P
141-150 E10.2 cm+3/s RC14 ?=- Rate coefficient for transition to state
4s6s 3S
151-160 E10.2 cm+3/s RC15 ?=- Rate coefficient for transition to state
3d4p 1F
161-170 E10.2 cm+3/s RC16 ?=- Rate coefficient for transition to state
4s6s 1S
171-180 E10.2 cm+3/s RC17 ?=- Rate coefficient for transition to state
4p2 1D
181-190 E10.2 cm+3/s RC18 ?=- Rate coefficient for transition to state
Ca++H-
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Acknowledgements:
A.K. Belyaev [Herzen University] - andrey.k.belyaev, gmail
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 09-Jul-2018