LASER INDUCED FLUORESCENCE OF Li₂ A ¹S_u⁺ STATE

TICIJANA BAN, HRVOJE SKENDEROVIĆ, BOJAN RESAN and GORAN PICHLER

Institute of Physics, P.O.Box 304, HR-10001 Zagreb, Croatia

Received 10 December 1997

By using several continuous wave (CW) single longitudinal-mode semiconductor laser diodes in the red spectral region, we have excited Li₂ molecule from the X ¹S_g⁺ state to the A ¹S_u⁺ state (transitions: (v˘˘ = 0, J˘˘ = 19)® (v˘ = 4, J˘ = 18); (v˘˘ = 1, J˘˘ = 9) ® (v˘ = 5, J˘ = 10); (v˘˘ = 2, J˘˘ = 9) ® (v˘ = 10, J˘ = 10)) and observed the fluorescence of the resonance A ® X lines together with collision-induced lines. Comparison with theoretical simulations shows a very good agreement. The use of two or three diode lasers is discussed in view of two- or three-step excitation of Li₂ molecule to the higher Rydberg or ionized molecular states.

UDC 539.19
PACS number: 33.20.-t

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