Espectroscopia de dupla ressonancia optica em calcio / Double ressonance optical spectroscopy in calcium

AUTOR(ES)

Luciana Claudia Martins Ferreira Diogenes

DATA DE PUBLICAÇÃO

2004

RESUMO

This work consists of a study of the weak 1 S 0 - 3 P 1 calcium transition in an atomic beam. This intercombination transition at 657 nm is a promising unified standard of length, time and frequency. Direct optical detection requires is difficult because it is a weak transition (g ~ 2000 s -1). However since calcium has a strong transition ( 1 S0 - 1 P1) which shares the ground state with this weak transition, we can observe that the fluorescence from the 1 S0 -1 P1 transition is modified when a laser at 657 nm is tuned to resonance with the weak intercombination transition. A simulation was carried out to obtain the populations of these three levels as function of the lasers detuning and intensity

ASSUNTO(S)

atomic spectroscopy atoms fisica atomica e molecular atomic and molecular physics lasers lasers calcio calcium atomos espectroscopia atomica

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