Femtosecond spectroscopy of the (2)1Σ u + double minimum state of Na2: time domain and frequency spectroscopy
1996
Femtosecond time resolved pump-probe experiments studying wave packet dynamics in the (2)1Σ u + double minimum state of Na2 are reported. The experiments were performed in a molecular beam with ion Time of Flight (TOF) detection. By Fast Fourier Transformation (FFT) of the observed time domain data the energy spacings of the coherently coupled vibrational levels in the (2)1Σ u + potential are obtained with an accuracy of 0.02 cm−1, although an ultrafast laser source with its inherent spectral width was used in the experiment.
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