Polarization degree differences for the 3p {sup 2}P{sub 3/2}-3s {sup 2}S{sub 1/2} transition of N{sup 4+}(3p {sup 2}P{sub 3/2}) produced in N{sup 5+}-He and N{sup 5+}-H{sub 2} collisions
- Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Post Office Box 8009 (China)
- Department of Physics and Key Laboratory for Atomic and Molecular Nanosciences, Tsinghua University, Beijing 100084 (China)
- Macedonian Academy of Sciences and Arts, Post Office Box 428, 1000 Skopje (Macedonia, The Former Yugoslav Republic of)
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397 (Japan)
The magnetic substate-selective single-electron-capture cross sections in collisions of N{sup 5+} with He and H{sub 2} are calculated using the two-center atomic orbital close-coupling method, and the polarization of emitted radiation from the excited state of N{sup 4+} is investigated for projectile energies between 1.2 and 7 keV/u. The polarization degrees for the 3p {sup 2}P{sub 3/2}-3s {sup 2}S{sub 1/2} transition of N{sup 4+}(3p {sup 2}P{sub 3/2}) produced in N{sup 5+}+He and N{sup 5+}+H{sub 2} electron-capture collisions are in general agreement with the experimental measurements. It is found both experimentally and theoretically that there exists a large difference between the polarization degrees of this radiation resulting from the N{sup 5+}+He and N{sup 5+}+H{sub 2} electron-capture collisions, namely, approx0.25 and approx0, respectively. By studying the time evolution of electron-capture dynamics in the two systems we have found that this difference is caused mainly by the difference in the interactions in the two systems at relatively small internuclear distances, consistent with the molecular picture of the collision dynamics.
- OSTI ID:
- 21388843
- Journal Information:
- Physical Review. A, Vol. 81, Issue 1; Other Information: DOI: 10.1103/PhysRevA.81.014702; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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