Doppler-free ablation fluorescence spectroscopy of Ca for high-resolution remote isotopic analysis

Abstract

We observed Doppler-free fluorescence spectra using ablation plumes. From the lineshape analyses the detailed collisional process in the ablation plume was revealed and the isotopic analysis for nuclides with small isotope shifts was demonstrated.

Laser Ablation Saturated Absorption Spectroscopy (LA-SAS) for In Situ Detection of Neodymium Isotopes

“…Two-photon spectroscopy could be a viable alternative to cancel out the Doppler effect. − A recent study by Miyabe et al established the optical configuration employing resonance-enhanced two-photon spectroscopy to observe fluorescence for calcium isotope analysis. The constructed system could successfully mitigate the line broadening while providing an intense signal.…”