The Transition V^1 +- X^1 +in Hydrogen Chloride

Fluorescence lifetimes of the 11Σ+uand 21Σ+ustates of Cl2and the B1Σ+state of HCl

“…The fluorescence is mainly generated in transitions from the outer state (V state) to the ground state. Douglas and Greening (1979) listed 26 vibrational levels of the B state, with the first five vibrational levels obtained from emission data of Jaques and Barrow (1958). The B (V) state has recently been studied by the laser multiphoton ionization technique (Spiglanin et a1 1987, Callaghan et a1 1987, the failure to observe some vibrational levels of the B state suggested that the lifetimes for these levels might be too short to provide resonance enhancement for the ionization processes.…”

“…The B 'X+ state of HCl has weak absorption cross sections (of the order of lo-" cm2), consequently, the fluorescence cross sections are also small although the fluorescence yield may be high as shown in Nee et a1 (1986). The fluorescence spectrum for the B state is difficult to obtain by direct photoabsorption and the identification of the B state was first made in an electric discharge through HC1 vapour (Jaques and Barrow 1958). A common property of all three excited states is the double-well type potential energy curves resulting from interactions of excited states as shown in figure 1 (Peyerimhoff and Buenker 198 1, Bettendorff et a1 1982).…”

Two-photon spectroscopy, Rydberg∼valence interactions, and superexcited state dissociation of HCl probed by resonance enhanced multiphoton ionization

“…Dashed lines indicate additional states reported in one-photon absorption and/or emission studies ( Refs. [33][34][35][36][37][38][39][40][41] . Vibrational numbering and state label are provided alongside most of the lines, while in the high energy region, only the symmetry and angular momentum of the states have been confirmed.…”

14b. Sous-Commission des Spectres Moleculaires d’Interet Astronomique

“…Parmi les autres travaux, signalons ceux du laboratoire de Professor T. E. Nevin a Dublin (nouveaux systemes infra-rouge et vert Gaydon-Herman de N 2 par P. K. Carroll et collaborateurs (13) (14) (15) (25); bandes de 0D+ par S. O'Connor (26), de la Specola Vaticana (bandes de HfO par J. Junkes ( 27)), de Moscou (probabilit6s de transition du systeme Schumann-Runge de 0 2 (28)), de Bale (travaux de E. Miescher sur N O (29)), de Stockholm (etude d'oxydes divers, BO (30), NO (31), AlO (32), LaO (33), par le groupe de A. Lagerqvist), de Chicago (P. G. Wilkinson, N 2 (34)), d'Oxford (R. F . Barrow,BF (35), G e F (36), HC1 (37)…”