Direct excitation of the “dark” b(3)Pi state predicted by deperturbation analysis of the A (1)Sigma(+)-b(3)Pi complex in KCsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The diode-laser-induced fluorescence spectra b(3)Pi(+)(Omega=0) -> X-1 Sigma(+) originated from the rovibronic levels of the “dark” triplet b(3)Pi(+)(Omega=0) state of KCs dimers were recorded with a Fourier transform spectrometer with a resolution of 0.03 cm(-1). Term values of 30 rovibronic levels (v(b0)*. [14,18]; J’ is an element of [47,134]) below the minimum of perturbing A(1)Sigma(+) state were determined with 0.003-0.01 cm(-1) uncertainty. The optimal excitation and detection lines for very weak spin-forbidden b(3)Pi(+)(Omega=0)-X-1 Sigma(+) transitions have been properly predicted in the framework of the coupled-channels deperturbation analysis recently performed for the singlet-triplet A(1)Sigma(+)-b(3)Pi(+)(Omega=0,1,2) complex [A. Kruzins et al., Phys. Rev. A 81, 042509 (2010)]. The lowest observed triplet level has only 8.6% of singlet admixture.