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Title: K x rays produced in collisions of bare ions with atoms: Contribution of multiple-electron transfer in Kr{sup 36+}, Ar{sup 18+}, and Ne{sup 10+}+Ar collisions

Abstract

K x rays have been observed in low energy collisions of bare Kr, Ar, and Ne ions with a neutral gas target. Although largely neglected previously, we have found that multiple-electron transfer processes play a significant role in shaping the x-ray spectra. The observed ratios of normal-satellite to hyper-satellite line intensities are found to be roughly independent of the ion species and much larger than those estimated from previously reported electron transfer cross sections, suggesting that there may be a strong correlation between two electrons during the electron transfer or during the subsequent cascades. It is suggested that exact knowledge of the initial and final principal and angular momentum quantum numbers (n,l) in electron transfer are the most essential missing ingredients for understanding the entire x-ray emission process in astrophysical, laboratory, and technological plasmas.

Authors:
; ; ; ; ;  [1];  [2];  [3]
  1. National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8421, USA and Max Planck Institute for Nuclear Physics, D-69117 Heidelberg (Germany)
  2. (Hungary)
  3. (United States)
Publication Date:
OSTI Identifier:
20786708
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevA.73.012704; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANGULAR MOMENTUM; ARGON; ARGON IONS; ATOMS; CATIONS; CHARGE EXCHANGE; CORRELATIONS; CROSS SECTIONS; ELECTRON TRANSFER; ELECTRONS; EMISSION SPECTRA; ION-ATOM COLLISIONS; KRYPTON; KRYPTON IONS; MULTICHARGED IONS; NEON; NEON IONS; PHOTON EMISSION; QUANTUM NUMBERS; X RADIATION; X-RAY SPECTRA

Citation Formats

Tawara, Hiro, Takacs, Endre, Suta, Tibor, Makonyi, Karoly, Ratliff, L. P., Gillaspy, J. D., National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8421, USA and University of Debrecen, Experimental Physics Department, Debrecen, Bem ter 18/A, H-4028, and National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8421. K x rays produced in collisions of bare ions with atoms: Contribution of multiple-electron transfer in Kr{sup 36+}, Ar{sup 18+}, and Ne{sup 10+}+Ar collisions. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.0.
Tawara, Hiro, Takacs, Endre, Suta, Tibor, Makonyi, Karoly, Ratliff, L. P., Gillaspy, J. D., National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8421, USA and University of Debrecen, Experimental Physics Department, Debrecen, Bem ter 18/A, H-4028, & National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8421. K x rays produced in collisions of bare ions with atoms: Contribution of multiple-electron transfer in Kr{sup 36+}, Ar{sup 18+}, and Ne{sup 10+}+Ar collisions. United States. doi:10.1103/PHYSREVA.73.0.
Tawara, Hiro, Takacs, Endre, Suta, Tibor, Makonyi, Karoly, Ratliff, L. P., Gillaspy, J. D., National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8421, USA and University of Debrecen, Experimental Physics Department, Debrecen, Bem ter 18/A, H-4028, and National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8421. Sun . "K x rays produced in collisions of bare ions with atoms: Contribution of multiple-electron transfer in Kr{sup 36+}, Ar{sup 18+}, and Ne{sup 10+}+Ar collisions". United States. doi:10.1103/PHYSREVA.73.0.
@article{osti_20786708,
title = {K x rays produced in collisions of bare ions with atoms: Contribution of multiple-electron transfer in Kr{sup 36+}, Ar{sup 18+}, and Ne{sup 10+}+Ar collisions},
author = {Tawara, Hiro and Takacs, Endre and Suta, Tibor and Makonyi, Karoly and Ratliff, L. P. and Gillaspy, J. D. and National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8421, USA and University of Debrecen, Experimental Physics Department, Debrecen, Bem ter 18/A, H-4028 and National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8421},
abstractNote = {K x rays have been observed in low energy collisions of bare Kr, Ar, and Ne ions with a neutral gas target. Although largely neglected previously, we have found that multiple-electron transfer processes play a significant role in shaping the x-ray spectra. The observed ratios of normal-satellite to hyper-satellite line intensities are found to be roughly independent of the ion species and much larger than those estimated from previously reported electron transfer cross sections, suggesting that there may be a strong correlation between two electrons during the electron transfer or during the subsequent cascades. It is suggested that exact knowledge of the initial and final principal and angular momentum quantum numbers (n,l) in electron transfer are the most essential missing ingredients for understanding the entire x-ray emission process in astrophysical, laboratory, and technological plasmas.},
doi = {10.1103/PHYSREVA.73.0},
journal = {Physical Review. A},
number = 1,
volume = 73,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2006},
month = {Sun Jan 15 00:00:00 EST 2006}
}