Observation of the v′=8←v=0 vibrational overtone in cold trapped HD +
Applied Physics B p. 1- 11
We report the observation of the hitherto undetected v′=8←v=0 vibrational overtone in trapped HD+molecular ions, sympathetically cooled by laser-cooled Be+ions. The overtone is excited using 782 nm laser radiation, after which HD+ions in v=8 are photodissociated by the 313 nm laser used for Be+cooling. The concomitant loss of HD+is detected by the method of secular excitation (Roth et al. in Phys. Rev. A. 74:040501(R), 2006). We furthermore present details of the experimental setup, and we show that results from spectroscopy of v′=8←v=0 overtones in combination with accurate ab initio calculations may yield a new value for the proton-electron mass ratio with an accuracy of order 1 ppb.
|Applied Physics B|
|Organisation||Erasmus MC: University Medical Center Rotterdam|
Koelemeij, J.C.J, Noom, D.W.E, de Jong, D, Haddad, M.A, & Ubachs, W. (2011). Observation of the v′=8←v=0 vibrational overtone in cold trapped HD +. Applied Physics B, 1–11. doi:10.1007/s00340-011-4802-y