Journalartikel

Jahr der Veröffentlichung: 2003

Zeitschrift: Physical review A

Bandnummer: 67

Heftnummer: 3

ISSN: 1050-2947

eISSN: 1094-1622

DOI Link: https://doi.org/10.1103/PhysRevA.67.032702

Verlag: American Physical Society

Abstract: 
Cross sections for the photoionization (PI) of Sc2+ ions with [Ar]3d ground-state configuration have been measured by employing the merged ion-photon beams method. The Sc2+ ions were produced from metallic vapor in an electron cyclotron resonance ion source, and the photon beam was generated by an undulator in the electron-synchrotron storage ring of the advanced light source of the Lawrence Berkeley National Laboratory. The experimental photon energy range 23-68 eV encompasses the direct 3d and 3p photoionization thresholds. The experimental photoion spectrum is dominated by autoionizing resonances due to 3p excitations predominantly decaying via Coster-Kronig and super-Coster-Kronig transitions. Individual resonances located around Eapproximate to40.2 eV have been measured with an instrumental energy spread DeltaE as low as 1.2 meV, corresponding to a resolving power of E/(DeltaE) around 33 500. The fractions of metastable ions in the Sc2+ ion beam are obtained by comparing the photoionization cross section with the recently measured [Schippers , Phys. Rev. A 65, 042723 (2002)] cross section for the time-reversed process of photorecombination of Sc3+ ions. Absolute strengths of several 3p(5) 3d(2) and 3p(5) 3d 4s PI resonances have been determined. They are the same as the corresponding resonance strengths for isoelectronic Ca+ ions.

Harvard-Zitierstil: Schippers, S., Müller, A., Ricz, S., Bannister, M., Dunn, G., Schlachter, A., et al. (2003) Photoionization of Sc2+ ions by synchrotron radiation: Measurements and absolute cross sections in the photon energy range 23–68 eV, Physical review A, 67(3), Article 032702. https://doi.org/10.1103/PhysRevA.67.032702

APA-Zitierstil: Schippers, S., Müller, A., Ricz, S., Bannister, M., Dunn, G., Schlachter, A., Hinojosa, G., Cisneros, C., Aguilar, A., Covington, A., Gharaibeh, M., & Phaneuf, R. (2003). Photoionization of Sc2+ ions by synchrotron radiation: Measurements and absolute cross sections in the photon energy range 23–68 eV. Physical review A. 67(3), Article 032702. https://doi.org/10.1103/PhysRevA.67.032702