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  Velocity dependence of electron-capture partial cross sections and alignment in low-energy collisions of Ne8+ and Ar8+ with atomic Na

Gauntt, D. M., & Danzmann, K. (1992). Velocity dependence of electron-capture partial cross sections and alignment in low-energy collisions of Ne8+ and Ar8+ with atomic Na. Physical Review A, 46(9), 5580-5593. doi:10.1103/PhysRevA.46.5580.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-5C78-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-5C79-B
Genre: Journal Article

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 Creators:
Gauntt, David M.1, Author
Danzmann, Karsten2, Author              
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1External Organizations, escidoc:persistent13              
2Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, escidoc:24010              

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 Abstract: We have measured the intensities and polarizations of fine-structure lines in the N=9-8 manifolds of Ne viii and Ar viii spectra produced in collisions of Ne8+ and Ar8+ (v=0.05–0.15 a.u.) with atomic sodium, and determined alignment and partial cross sections for electron capture as functions of projectile velocity. At low velocity the partial cross section for capture into the S levels is significantly higher than for capture into higher L levels, and at higher velocities the higher-L partial cross sections increase for Ar viii and dominate for Ne viii. The low-L-level cross sections are in fair agreement with multichannel-Landau-Zener calculations, while the high-L-level cross sections are in qualitative disagreement. For the neon projectiles, the polarization of the Bohr line is approximately 0.3 and independent of velocity; for argon projectiles, the polarization is approximately 0.15 and increases with increasing velocity. A qualitative theoretical interpretation is offered.

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 Dates: 1992-11
 Publication Status: Published in print
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Title: Physical Review A
Source Genre: Journal
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Pages: - Volume / Issue: 46 (9) Sequence Number: - Start / End Page: 5580 - 5593 Identifier: ISSN: 1094-1622