Spectroscopic Observation of Isotopic Fractionation in Expanding Laser Induced Plasma (LIP) Plume

Abstract

This study investigates isotopic fractionation in laser-induced plasma using calibration-free LAMIS. Fractionation proves to be a transient early-time phenomenon linked to plasma expansion. ¹⁰B enrichment observed at plume periphery, and later relax to bulk composition. Variations across different atmosphere and laser wavelength were also analysed, offering insights for optimizing laser-based isotopic measurements.