Resonance ionization spectroscopy of stable strontium isotopes and 90Sr via 5s2 1S0→5s5p 1P1→5s5d 1D2→5s11f 1F3→Sr+
作者： B.A. Bushaw , W. Nörtershäuser
DOI: 10.1016/S0584-8547(00)00269-X
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摘要: Abstract Single-, double- and triple-resonance ionization in the 5s 2 1 S 0 →5s5p P →5s5d D →5s11f F 3 →Sr + system of strontium was investigated to achieve an efficient highly selective scheme for ultra-trace detection radioisotope 90 Sr. Isotope shifts hyperfine structure all stable isotopes Sr were measured three resonant transitions. Good agreement with previous data found transition precision improved by approximately one order magnitude. shifts, including that Sr, two- three-photon transitions first time. The schemes characterized respect their isotopic selectivity double-resonance process offers optical 2×10 4 , while unfavorable isotope limit its ∼100. Using combined mass spectrometric detection, overall efficiency >10 −5 a 10 0.7 fg samples excess have been demonstrated.
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