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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52956

    Title: Rotationally resolved fluorescence excitation spectrum produced through photoexcitation of the coupled c '(4)(0) and b '(1) states of N(2)
    Authors: Wu,CYR;Lo,JI;Lin,YC;Fung,HS;Lee,YY;Yih,TS;Judge,DL
    Contributors: 物理學系
    Date: 2011
    Issue Date: 2012-06-11 10:51:30 (UTC+8)
    Publisher: 國立中央大學
    Abstract: Employing a high-resolution spectrometer in a synchrotron radiation facility we have demonstrated the feasibility of studying rotationally resolved fluorescence excitation spectra (FES) in the extreme ultraviolet region. Specifically, we have obtained FES spectrum of the (1,0) band of the b' (1)Sigma(+)(u)-X(1) Sigma(+)(g) transition using a resolution of 0.0024 nm and the resonance FES of the (0,0) band of the c'(4) (1)Sigma(+)(u)-X(1) Sigma(+)(g) transition using a resolution of 0.0048 nm produced through photoexcitation of N(2) in the spectral region between 95.75 and 96.00 nm. Strong local rotational perturbation between the c'(4) (0) and the b'(1) states occurring at excited rotational levels J' = 10 and 11 has been confirmed in the FES of the b' (1)Sigma(+)(u)-X(1) Sigma(+)(g) transition, in excellent agreement with early absorption spectroscopic study. From the observed relative fluorescence intensities we conclude that the production of the intense emission of the (1,0) b'-X transition is at the expense of the (0,0) c'(4) -X emission of N(2). The c'(4)(0) state apparently prefers to radiate back to the ground electronic state while the b'(1) state appears to favor branching to the a(1) Pi(g) state and the subsequent a (1)Pi(g) -> X(1) Sigma(+)(g) transition. (C) 2011 Elsevier B.V. All rights reserved.
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