Abstract
We report a high-resolution spectroscopic study of molecular ions at millikelvin temperatures. We measured several rovibrational infrared transitions in molecular ions, stored in a radio-frequency trap and sympathetically cooled to by laser-cooled ions. We observed hyperfine splitting of the lines, in good agreement with theoretical predictions. The transitions were detected by monitoring the decrease in ion number after selective photodissociation of ions in the upper vibrational state. The method described here is expected to be generally applicable.
- Received 27 June 2006
DOI:https://doi.org/10.1103/PhysRevA.74.040501
©2006 American Physical Society