Isotopic mass dependence in the bound–free D–X fluorescence spectrum of Br₂

Abstract

The D + X transition is studied for both natural Br, and "Br,, using 1576-A radiation from an F, laser to excite the fluorescence. The characteristic interference structure at the long-wavelength end of the spectrum is found to be much more sensitive to changes in isotopic mass than to changes in the vibrational and rotational quantum numbers, when all three represent comparable changes in the energy of the excited state. These dependences are consistent with predictions from semiclassical theory.On a CtudiC la transjtion D -+ X pour les deux molCcules Br, nature et "Br,, en utilisant, pour exciter la fluorescence, le rayonnement B 1576 A d'un laser F,. On trouve que la structure caractkristique d'interfkrence a I'extrCmitC du spectre, du c6tC des grandes longueurs d'onde, est beaucoup plus sensible aux changements de masse isotopique qu'aux changements des nombres quantiques de vibration et de rotation, lorsque tous ces trois changements correspondent a des variations comparable~ dans 1'Cnergie de I'etat excite. Ces effets sont compatibles avec les prkdictions de la thtorie semi-classique.[Traduit par la revue].Can.

The dissociation energy of BrCl and the equilibrium constant for its formation reaction in the gas phase

“…22 The potential curves needed for these calculations were RKR curves based on data covering extensive ranges of the ground states for Cl 2 and Br 2 ; 23,24 for BrCl the spectroscopic coverage is more limited, and I extended the attractive branch using judicious approximations for the leading long-range contributions to the potential. 25 The partition functions q include internal and translational degrees of freedom and must be referenced to a common energy.…”

Αναπτυξη Laser Μοριακου Φθοριου Και Φωτοδιασπαση Του Hgbr2 Στα 157 Νμ

“…Άλλα μόρια που έχουν μελετηθεί με laser F2 είναι το OCS (Woodworth 1979, Ondrey 1983, Strauss 1989, το Η2Ο2 (Golzenleuchter 1984), το ICN (Guest 1987), το HDO (Shafer 1989), το Br2 (Tellinghuisen 1989), το HgF 2 (Whitehurst 1988), κ.λπ.…”