Details
| Original language | English |
|---|---|
| Pages (from-to) | 5580-5593 |
| Number of pages | 14 |
| Journal | Physical Review A |
| Volume | 46 |
| Issue number | 9 |
| Publication status | Published - Nov 1992 |
| Externally published | Yes |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 46, No. 9, 11.1992, p. 5580-5593.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Velocity dependence of electron-capture partial cross sections and alignment in low-energy collisions of Ne8+ and Ar8+ with atomic Na
AU - Gauntt, David M.
AU - Danzmann, Karsten
PY - 1992/11
Y1 - 1992/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0009744124&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.46.5580
DO - 10.1103/PhysRevA.46.5580
M3 - Article
AN - SCOPUS:0009744124
VL - 46
SP - 5580
EP - 5593
JO - Physical Review A
JF - Physical Review A
SN - 1050-2947
IS - 9
ER -