J/A+A/674/A201 He+(1s)-He(1s2) electron-capture processes (Wang+, 2023)
Elastic and electron capture processes in slow He±He collision.
Wang Y., Wang F., Lin X., Liu L., Wu Y., Wang J.
<Astron. Astrophys. 674, A201 (2023)>
=2023A&A...674A.201W 2023A&A...674A.201W (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: astroparticle physics - atomic processes - atomic data
Abstract:
The elastic and electron-capture processes of He+ ions with ground
helium atoms are very important for investigating astrophysics. It is
essential to have reliable state-selective charge transfer, elastic,
transport cross-sections, and the corresponding reaction rate
coefficient data, especially for low collision energies.
The elastic and non-radiative electron-capture processes in
He+(1s)-He(1s2) collisions are investigated employing the full
quantum-mechanical molecular orbital close-coupling method. The ab
initio adiabatic potentials and coupling matrix elements utilized are
obtained by the multi-reference single- and double-excitation
configuration interaction approach.
The elastic, charge-transfer, and transport cross-sections in the
energy range of 0.01-2500eV/amu and the reaction rate coefficient in
the temperature range of 10-109K are computed, and good agreements
are achieved compared to the available experimental and theoretical
results. Shape resonance, Regge, and Glory oscillations are found in
the elastic and charge transfer cross-sections in the considered
energy region.
Description:
In present study we employed the full quantum-mechanical
molecular-orbital close-coupling (QMOCC) method to study the elastic
and electron-capture processes of He+(1s)-He(1s2) in detail in the
energy range from 0.01eV/amu to 2500eV/amu.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablee1.dat 105 26 QMOCC calculations for total, spin-resolved
state-selective charge transfer cross-sections
for electron capture to the singlet and triplet
states of He(1snl, n=1-3) atom in He±He
collision system.
Resluts of 34 molecular states.
tablee2.dat 60 750 QMOCC calculations for resonant charge transfer
(or ground state transfer), elastic, and
transfer cross-sections in He±He collision
system. Resluts of 2 molecular states
tablee3.dat 81 64 nl-resolved charge transfer reaction rate
coefficients (RC) for He+(1s)-He(1s2) collisions
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See also:
J/A+A/625/A29 : Slow collisions of O6+ with H cross section (Lin+, 2019)
Byte-by-byte Description of file: tablee1.dat
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Bytes Format Units Label Explanations
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1- 6 F6.1 eV/u Energy Collision energy
8- 12 F5.2 10-16cm2 TotalCT Total charge transfer cross-section
for 34 states
14- 18 F5.2 10-16cm2 1s2-1S Electron capture to He(1s2 1S)
20- 26 F7.5 10-16cm2 1s2s-1S Electron capture to He(1s2s 1S)
28- 34 F7.5 10-16cm2 1s2s-3S Electron capture to He(1s2s 3S)
36- 42 F7.5 10-16cm2 1s2p-3P Electron capture to He(1s2p 3P)
44- 51 F8.6 10-16cm2 1s2p-1P Electron capture to He(1s2p 1P)
53- 60 F8.6 10-16cm2 1s3s-3S Electron capture to He(1s3s 3S)
62- 69 E8.3 10-16cm2 1s3s-1S Electron capture to He(1s3s 1S)
71- 78 E8.3 10-16cm2 1s3p-3P Electron capture to He(1s3p 3P)
80- 87 E8.3 10-16cm2 1s3d-3D Electron capture to He(1s3d 3D)
89- 96 E8.3 10-16cm2 1s3s-1D Electron capture to He(1s3d 1D)
98-105 E8.3 10-16cm2 1s3p-1P Electron capture to He(1s3p 1P)
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Byte-by-byte Description of file: tablee2.dat
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Bytes Format Units Label Explanations
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1- 14 F14.9 eV/u Energy Collision energy
16- 21 F6.3 10-16cm2 ResonantCT Resonant charge transfer cross-section
23- 28 F6.2 10-16cm2 Elastic Elastic cross-section
30- 35 F6.2 10-16cm2 Total Elastic integer total cross-sections
37- 42 F6.2 10-16cm2 ct+el Sum of ResonantCT and elastic cross-sections
44- 49 F6.2 10-16cm2 Diffusion Diffusion cross-sections
51- 60 F10.6 10-16cm2 Viscous Viscous cross-sections
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Byte-by-byte Description of file: tablee3.dat
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Bytes Format Units Label Explanations
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1- 9 I9 K Temp Temperature
11- 18 E8.3 cm3/s TotalRC-2s Total rate coefficient in case of 2-states
20- 27 E8.3 cm3/s TotalRC-34 Total rate coefficient in case of 34-states
29- 36 E8.3 cm3/s 1s2 Rate coefficient for transfer to He(1s2)
38- 45 E8.3 cm3/s 1s2s Rate coefficient for transfer to He(1s2s)
47- 54 E8.3 cm3/s 1s2p Rate coefficient for transfer to He(1s2p)
56- 63 E8.3 cm3/s 1s3s Rate coefficient for transfer to He(1s3s)
65- 72 E8.3 cm3/s 1s3p Rate coefficient for transfer to He(1s3p)
74- 81 E8.3 cm3/s 1s3d Rate coefficient for transfer to He(1s3d)
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Acknowledgements:
Ling Liu, liu_ling(at)iapcm.ac.cn
(End) Patricia Vannier [CDS] 25-Apr-2023