High resolution IR spectroscopy of HDO and HDO (N_2)_n in helium nanodroplets

摘要

We report on the IR-spectra of HDO and aggregates of HDO and N_2 embedded in superfluid helium nanodroplets in the region of the bound O-D stretch vibration. The R(0) transition 000 → 101 of HDO was observed at 2738.157 50 (7) cm~(-1). The linewidth of this transition was determined to be 0.060 (4) cm~(-1). In HDO (N_2)_n aggregates, the bound O-D stretch vibration was observed at 2732.36(1) and 2730.62 (1) cm~(-1) for n=1 and n=2, respectively. The line broadening amounts to 1.86(7) and 2.73 (7) cm~(-1), which correspond to lifetimes of 2.84(1) and 1.94(5) ps.