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Applied Physics B

, Volume 57, Issue 2, pp 109–112 | Cite as

Resonance ionization spectroscopy of thorium

  • Th. Billen
  • K. Schneider
  • T. Kirsten
  • A. Mangini
  • A. Eisenhauer
Article

Abstract

Here we describe experiments aimed at developing an element-selective ion source for thorium (Th). The technique applied is resonance ionization spectroscopy (RIS) with a thermal atom beam. Ionization schemes for isotopically nonselective ionization of Th as well as for isotopically selective ionization of 230Th are proposed. The RIS-scheme used is two-photon two-colour ionization with excitation in the ultraviolet spectral range between 244 nm and 267 nm or in the visible spectral range between 485 nm and 529 nm. Ionization of the excited atoms is performed either by ultraviolet photons or by visible photons, depending on the energy required for this process.

PACS

32.80.Fb 07.75+h 

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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • Th. Billen
    • 1
  • K. Schneider
    • 1
  • T. Kirsten
    • 1
  • A. Mangini
    • 2
  • A. Eisenhauer
    • 2
  1. 1.Max-Planck-Institut für KernphysikHeidelbergGermany
  2. 2.Heidelberger Akademie der WissenschaftenHeidelbergGermany

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