J/A+A/606/A106 Inelastic manganese-hydrogen collisions data (Belyaev+, 2017)
Atomic data on inelastic processes in low-energy manganese-hydrogen collisions.
Belyaev A.K., Voronov Ya.V
<Astron. Astrophys. 606, A106 (2017)>
=2017A&A...606A.106B 2017A&A...606A.106B (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - stars: abundances
Abstract:
The aim of this paper is to calculate cross sections and rate
coefficients for inelastic processes in low-energy Mn+H and Mn++H-
collisions, especially, for processes with high and moderate rate
coefficients. These processes are required for non-local thermodynamic
equilibrium (non-LTE) modeling of manganese spectra in cool stellar
atmospheres, and in particular, for metal-poor stars.
The calculations of the cross sections and the rate coefficients were
performed by means of the quantum model approach within the framework
of the Born-Oppenheimer formalism, that is, the asymptotic
semi-empirical method for the electronic MnH molecular structure
calculation followed by the nonadiabatic nuclear dynamical calculation
by means of the multichannel analytic formulas.
The cross sections and the rate coefficients for low-energy inelastic
processes in manganese-hydrogen collisions are calculated for all
transitions between 21 low-lying covalent states and one ionic state.
We show that the highest values of the cross sections and the rate
coefficients correspond to the mutual neutralization processes into
the final atomic states Mn(3d54s(7S)5s e 6S),
Mn(3d54s(7S)5p y 8Po), Mn(3d54s(7S)5s e 8S),
Mn(3d54s(7S)4d e 8D) [the first group], the processes with
the rate coefficients (at temperature T=6000K) of the values
4.38x10-8, 2.72x10-8, 1.98x10-8, and 1.59x10-8cm3/s,
respectively, that is, with the rate coefficients exceeding
10-8cm3/s. The processes with moderate rate coefficients, that is,
with values between 10-10 and 10-8cm3/s include many excitation,
de-excitation, mutual neutralization and ion-pair formation processes.
In addition to other processes involving the atomic states from the
first group, the processes from the second group include those
involving the following atomic states:
Mn(3d5(6S)4s4p(1Po)y 6Po),
Mn(3d54s(7S)4de 6D), Mn(3d54s(7S)5pw 6Po),
Mn(3d5(4P)4s4p(3Po)y 6Do),
Mn(3d5(4G)4s4p(3Po)y 6Fo).
The processes with the highest and moderate rate coefficients are
expected to be important for non-LTE modeling of manganese spectra in
stellar atmospheres.
Description:
Rate coefficients in cm3/s for inelastic Mn+H and Mn++H-
collisions for temperatures from T=1000K to T=10000K.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rc_1000.dat 255 22 Rate coefficients at T=1000K
rc_2000.dat 255 22 Rate coefficients at T=2000K
rc_3000.dat 255 22 Rate coefficients at T=3000K
rc_4000.dat 255 22 Rate coefficients at T=4000K
rc_5000.dat 255 22 Rate coefficients at T=5000K
rc_6000.dat 255 22 Rate coefficients at T=6000K
rc_7000.dat 255 22 Rate coefficients at T=7000K
rc_8000.dat 255 22 Rate coefficients at T=8000K
rc_9000.dat 255 22 Rate coefficients at T=9000K
rc_10000.dat 255 22 Rate coefficients at T=10000K
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See also:
J/A+A/593/A27 : Inelastic beryllium-hydrogen collision data (Yakovleva+, 2016)
Byte-by-byte Description of file: rc_*.dat
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Bytes Format Units Label Explanations
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1- 26 A26 --- State Initial state of Mn in collisions with H
or ionic state
28- 36 A9 --- Term Manganese term
38- 45 E8.2 cm+3/s RC1 Rate coefficient for transition to state
3d5 4s2 (term a 6S)
48- 55 E8.2 cm+3/s RC2 Rate coefficient for transition to state
3d6 (5D)4s (term a 6D)
58- 65 E8.2 cm+3/s RC3 Rate coefficient for transition to state
3d5 (6S)4s4p(3Po) (term z 8Po)
68- 75 E8.2 cm+3/s RC4 Rate coefficient for transition to state
3d5 (6S)4s4p(3Po) (term z 6Po)
78- 85 E8.2 cm+3/s RC5 Rate coefficient for transition to state
3d5 (6S)4s4p(1Po) (term y 6Po)
88- 95 E8.2 cm+3/s RC6 Rate coefficient for transition to state
3d5 4s(7S)5s (term e 8S)
98-105 E8.2 cm+3/s RC7 Rate coefficient for transition to state
3d5 4s(7S)5s (term e 6S)
108-115 E8.2 cm+3/s RC8 Rate coefficient for transition to state
3d6 (5D)4p (term z 6Do)
118-125 E8.2 cm+3/s RC9 Rate coefficient for transition to state
3d6 (5D)4p (term z 6Fo)
128-135 E8.2 cm+3/s RC10 Rate coefficient for transition to state
3d6 (5D)4p (term x 6Po)
138-145 E8.2 cm+3/s RC11 Rate coefficient for transition to state
3d5 4s(7S)5p (term y 8Po)
148-155 E8.2 cm+3/s RC12 Rate coefficient for transition to state
3d5 4s(7S)4d (term e 8D)
158-165 E8.2 cm+3/s RC13 Rate coefficient for transition to state
3d5 4s(7S)4d (term e 6D)
168-175 E8.2 cm+3/s RC14 Rate coefficient for transition to state
3d5 4s(7S)5p (term w 6Po)
178-185 E8.2 cm+3/s RC15 Rate coefficient for transition to state
3d5 (4P)4s4p(3Po) (term y 6Do)
188-195 E8.2 cm+3/s RC16 Rate coefficient for transition to state
3d5 (4G)4s4p(3Po) (term y 6Fo)
198-205 E8.2 cm+3/s RC17 Rate coefficient for transition to state
3d5 4s(5S)5s (term f ^6S)
208-215 E8.2 cm+3/s RC18 Rate coefficient for transition to state
3d5 (4P)4s4p(3Po) (term v 6Po)
218-225 E8.2 cm+3/s RC19 Rate coefficient for transition to state
3d5 4s(7S)6s (term f 8S)
228-235 E8.2 cm+3/s RC20 Rate coefficient for transition to state
3d5 4s(7S)6s (term g 6S)
238-245 E8.2 cm+3/s RC21 Rate coefficient for transition to state
3d5 (4D)4s4p(3Po) (term x 6Fo)
248-255 E8.2 cm+3/s RC22 Rate coefficient for transition to state
Mn++H-
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Acknowledgements:
A.K. Belyaev, andrey.k.belyaev(at)gmail.com
(End) A.K. Belyaev [Herzen University], Patricia Vannier [CDS] 05-Jul-2017