Espectroscopia de alta resolução num feixe supersônico de sódio / Ultra-high resolution spectroscopy in a supersonic sodium beam

AUTOR(ES)

Euclydes Marega Junior

DATA DE PUBLICAÇÃO

1993

RESUMO

This work reports measurements in the vibrational bands of the A1∑+u→X1∑+g transition for Sodium dimer, produced in a supersonic expansion of the metal vapor into the vacuum. For the determination of the molecular constants we used righ-resolution laser spectroscopy techniques: Resonance Fluorescence, Stimulated Raman and Optical Depletion. The two last techniques need two lasers fields and provide the simplification of the Resonance Fluorescence spectrum, suitable for the tine assignment. We have also developed a new method to obtain Ramsey-like fringes in the optical region, due to a spatial modulation of the ground state population of any open two-level system. Tbe fringes were obtained without any atomic coherence of the levels, which is an effect observed in the literature for the first time.

ASSUNTO(S)

espectroscopia sódio spectroscopy feixe atômico atomic beam sodium

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