3 research outputs found
Doppler-free high resolution continuous wave optical UV-spectroscopy on the \mathrm{A}\,^2\Sigma^+ \leftarrow \mathrm{X}\,^2\Pi_{3/2} transition in nitric oxide
We report on Doppler-free continuous-wave optical UV-spectroscopy resolving
the hyperfine structure of the \mathrm{A}\,^2\Sigma^+ \leftarrow
\mathrm{X}\,^2\Pi_{3/2} transition in nitric oxide for total angular momenta
on the branch. The resulting line
splittings are compared to calculated splittings and fitted determining new
values for the molecular constants and for the
\mathrm{A}\,^2\Sigma^+ state. The constants are in good agreement with values
previously determined by quantum beat spectroscopy.Comment: 8 Pages, 4 figure
Collisional shift and broadening of Rydberg states in nitric oxide at room temperature
We report on the collisional shift and line broadening of Rydberg states in
nitric oxide (NO) with increasing density of a background gas at room
temperature. As a background gas we either use NO itself or nitrogen (N).
The precision spectroscopy is performed by a sub-Doppler three-photon
excitation scheme with a subsequent readout of the Rydberg states realized by
the amplification of a current generated by free charges due to collisions. The
shift shows a dependence on the rotational quantum state of the ionic core and
no dependence on the principle quantum number of the orbiting Rydberg electron.
The experiment was performed in the context of developing a trace-gas sensor
for breath-gas analysis in a medical application