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Efficient three-step, two-color ionization of plutonium using a resonance enhanced 2-photon transition into an autoionizing state

  • P. Kunz
  • G. Huber
  • G. Passler
  • N. Trautmann
Article

Abstract.

Resonance ionization mass spectrometry (RIMS) has proven to be a powerful method for isotope selective ultra-trace analysis of long-lived radioisotopes. For plutonium detection limits of \(\rm 10^{6}\) to \(\rm 10^{7}\) atoms have been achieved for various types of samples. So far a three-step, three-color laser excitation scheme was applied for efficient ionization. In this work, a two-photon transition from an excited state into a high-lying autoionizing state, will be presented, yielding a similar overall efficiency as the three-step, three-color ionization scheme. In this way, only two tunable lasers are needed, while the advantages of a three-step, three-color excitation (high selectivity, good efficiency and low non-resonant background) are preserved. The two-photon transition has been characterized with respect to saturation behavior and line width. The three-step, two-color ionization is a possibility for an improved RIMS procedure.

Keywords

Line Width Plutonium Laser Excitation Powerful Method Good Efficiency 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  1. 1.Institut für PhysikUniversität MainzMainzGermany
  2. 2.Institut für KernchemieUniversität MainzMainzGermany

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