Journal article

Publication year: 2001

Journal: Physical review A

Volume number: 64

Issue number: 5

ISSN: 1050-2947

eISSN: 1094-1622

DOI Link: https://doi.org/10.1103/PhysRevA.64.052706

Publisher: American Physical Society

Abstract: 
Experimental measurements and theoretical calculations of absolute cross sections are carried out for the electron-impact ionization of atomic ions in the Sm rare-earth-metal isonuclear sequence. Absolute cross sections for SMq+ ions for q = 1 - 12 were measured using the electron-ion crossed-beam technique and calculated with the configuration-average distorted-wave method for the charge states q = 4-12. The theory includes both direct ionization and excitation-autoionization contributions, and includes transitions from both ground and metastable levels. We present the cross sections in an electron-impact energy range from threshold up to 1000eV for all Sm ions up to Sm12+. These systems are extremally complex, but the configuration-average method, when combined with statistical averaging of the cross sections over the many levels, provides results that are in overall good agreement with the experimental measurements. The single-ionization cross sections are dominated by contributions from indirect mechanisms of excitation-autoionization in the low-energy region.

Harvard Citation style: Aichele, K., Arnold, W., Hathiramani, D., Scheuermann, F., Salzborn, E., Mitnik, D., et al. (2001) Experimental and theoretical study of electron-impact ionization of atomic ions in the Sm isonuclear sequence, PHYSICAL REVIEW A, 64(5), Article 052706. https://doi.org/10.1103/PhysRevA.64.052706

APA Citation style: Aichele, K., Arnold, W., Hathiramani, D., Scheuermann, F., Salzborn, E., Mitnik, D., Griffin, D., Colgan, J., & Pindzola, M. (2001). Experimental and theoretical study of electron-impact ionization of atomic ions in the Sm isonuclear sequence. PHYSICAL REVIEW A. 64(5), Article 052706. https://doi.org/10.1103/PhysRevA.64.052706