D. Pfluger et al., Rotationally resolved electronic absorption spectra of triacetylene cationin a supersonic jet, CHEM P LETT, 313(1-2), 1999, pp. 171-178
The rotationally resolved cold spectra (T-rot approximate to 17 K) of the A
(2)Pi(g) <-- X(2)Pi(g) 0(0)(0) and 4(0)(1) transitions of triacetylene cati
on have been recorded in a supersonic jet. A discharge modulation in combin
ation with the external frequency modulation of a cw ring laser is used to
enhance detection sensitivity. The advantage of obtaining the spectra of su
ch species under jet conditions is shown by comparison with measurements in
a cell of the 4(0)(1) vibronic transition. The combined analyses of the ro
tational structure yields rotational and spin-orbit constants for the nu(4)
= 1 level of the A(2)Pi(g) state. (C) 1999 Elsevier Science B.V. All right
s reserved.