Abstract
A near resonant two-photonionization scheme , has been investigated for the isotope selective excitation of 41Ca isotope for its applications as a tracer in bio-medical studies. The ionization efficiency and optical selectivity have been calculated for various powers of the excitation and ionization laser. Under the optimized excitation/ionization laser powers the ionization efficiency and the optical selectivity for the studied scheme are found to be 1.3 × 10−4 and ∼1.0 × 104, respectively. The ionization efficiency is two orders of magnitude higher than the step-wise excitation process. In combination with a mass spectrometer, an overall selectivity of ∼1010 can be obtained which is adequate for bio-medical applications.
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