Journal article

Publication year: 1995

Pages: 2711-2721

Journal: Journal of Physics B: Atomic, Molecular and Optical Physics

Volume number: 28

Issue number: 13

ISSN: 0953-4075

DOI Link: https://doi.org/10.1088/0953-4075/28/13/021

Publisher: IOP Publishing

Abstract: 
Employing the 'crossed-beams' technique, electron-impact ionization cross sections for the single-ionization of W-q+ ions in charge states q = 1...10 have been measured. The cross sections for the ionization of ions in charge states q greater than or equal to 5 show significant contributions below the ground-state threshold caused by the ionization of ions in excited, long-lived metastable states in the parent ion beam. In the case of W6+, the measured cross section is completely dominated by metastable contributions. For ions in charge states q = 3...7, excitation-autoionization from the ground state as well as from excited, metastable states contributes strongly to the cross sections. This results in a strong underestimation of the measured cross sections by the semiempirical Lotz formula in the energy range between the ionization threshold and the cross section maximum.

Harvard Citation style: STENKE, M., AICHELE, K., HARTHIRAMANI, D., HOFMANN, G., STEIDL, M., VOLPEL, R., et al. (1995) ELECTRON-IMPACT SINGLE-IONIZATION OF SINGLY AND MULTIPLY-CHARGED TUNGSTEN IONS, Journal of Physics B: Atomic, Molecular and Optical Physics, 28(13), pp. 2711-2721. https://doi.org/10.1088/0953-4075/28/13/021

APA Citation style: STENKE, M., AICHELE, K., HARTHIRAMANI, D., HOFMANN, G., STEIDL, M., VOLPEL, R., & SALZBORN, E. (1995). ELECTRON-IMPACT SINGLE-IONIZATION OF SINGLY AND MULTIPLY-CHARGED TUNGSTEN IONS. Journal of Physics B: Atomic, Molecular and Optical Physics. 28(13), 2711-2721. https://doi.org/10.1088/0953-4075/28/13/021