Showing papers by "Yutaka Matsumi published in 1984"
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TL;DR: In this article, the lifetime separation method is combined with the laser-induced fluorescence (LIF) spectra of diatomic sulfur spectra in a supersonic free jet which is expanded from a high temperature nozzle source of 800 K.
Abstract: The laser‐induced fluorescence (LIF) spectra of diatomic sulfur are studied in a supersonic free jet which is expanded from a high temperature nozzle source of 800 K. The lifetime separation method is advantageously combined with the LIF detection in the supersonic free jet. The weak B″ 3Πu–X 3Σ−g band is thereby observed successfully in good distinction among the strong B 3Σ−u–X 3Σ−g band system. The rotational constants and term values of the vibronic levels v′=3–18 B″ 3Πu (F1,F2) are evaluated by a rotational analysis. An inspection of the intensity distribution among the observed spectral lines indicates that the B″ 3Πu–X 3Σ−g bands borrow intensity from B″ 3Σ−u–X 3Σ−g bands through homogeneous perturbations. The anomalous behavior of molecular constants, including the irregular vibronic dependence of the spin‐splitting constant of B 3Σ−u, is interpreted in terms of the perturbation from the B″ 3∏u state.
25 citations