Hyperfine and Zeeman measurements in the infrared spectrum of doubly charged molecule D sup 3 sup 5 C1 sup 2 sup +

An experimental investigation of the X sup 3 SIGMA sup - ground electronic state of the doubly charged molecule D sup 3 sup 5 Cl sup 2 sup + was performed using the Fast-lon-Beam/Laser-Beam-Spectrometer (FIBLBS), with a CO sub 2 infrared laser acting as the source of exciting radiation. Hyperfine resolved transitions between the nu=1->2 vibrational bands were observed for D sup 3 sup 5 Cl sup 2 sup +. The observed spectrum was analysed for transition frequencies, linewidths and relative signal intensities. A solenoid was designed, built and incorporated into the FIBLBS for the inducement of Zeeman splitting in the hyperfine structure of D sup 3 sup 5 Cl sup 2 sup +. The solenoid was used to investigate the splitting of a P branch hyperfine quartet over a variety of magnetic fields and was subsequently assigned unambiguously as a P sub Q sub sub 2 sub sub 3 (6) transition, with F quantum numbers 7/2, 9/2, 11/2 and 13/