Isotope shifts of Zn neutral atoms measured by two-photon Doppler-free laser-induced fluorescence spectroscopy
| Autor: | D.M. Gruen, Michael J. Pellin, Heinrich F. Arlinghaus, C.E. Young, W.F. Calaway, L. L. Chase |
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| Rok vydání: | 1990 |
| Předmět: |
Dye laser
Argon Chemistry Stable isotope ratio Analytical chemistry Physics::Optics chemistry.chemical_element Radiation Condensed Matter Physics Laser Fluorescence spectroscopy Surfaces Coatings and Films law.invention symbols.namesake Two-photon excitation microscopy law symbols Physics::Atomic Physics Atomic physics Instrumentation Doppler effect |
| Zdroj: | Vacuum. 41:204-206 |
| ISSN: | 0042-207X |
| DOI: | 10.1016/0042-207x(90)90310-u |
| Popis: | Two-photon Doppler-free laser-induced fluorescence spectroscopy has been used for the first time to measure isotope shifts between the three most abundant stable isotopes of zinc (64, 66 and 68). A high-resolution laser system, consisting of an argon ion-pumped cw ring dye laser, a three-stage pulsed amplifier chain, and a doubling crystal, was used to generate tunable uv radiation for the experiment. Gas-phase Zn atoms were generated by laser-ablating a ZnS crystal. The Doppler-free spectrum was produced for the two-photon allowed 4s 2 1 S 0 −4d 1 D 2 transition (λ = 160 nm) of Zn by reflecting the laser beam back on itself. The measured isotope shifts were 976 ± 39 MHz for 64 Zn− 66 Zn and 888 ± 24 MHz for 66 Zn− 68 Zn. The technique of producing counter-propagating light by back-reflecting the laser beam has been used in situ to determine both the zero velocity frequency of particles in Doppler-shifted velocity distribution experiments and to measure the bandwidth of frequency-doubled laser light. |
| Databáze: | OpenAIRE |
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