15min:

CHUANXI DUAN, RUI ZHENG, SONG LI AND GUANGMING HUANG, College of Physical Science and Technology, HuaZhong Normal University, Wuhan 430079, China.

We have observed the mid-infrared absorption spectra of D₂O⁺ using a tunable lead-salt diode laser spectrometer with velocity-modulation technique. The D₂O⁺ ions were generated in a water-cooled discharge of a mixture of D₂O and helium. Spectra were collected in the region between 1000 and 1150 cm^-1. Totally 64 lines were assigned to the ₂ fundamental band of D₂O⁺ (X²B₁). Precise molecular constants have been determined.