The lifetime of the Xe II 5p 4 6p 4 P 5/2 0 level is measured by selective laser excitation of a fast beam of metastable 5p 4 5d 4 D 7/2 xenon ions and observations of the fluorescent light intensity as a function of flight time. Comparison of the obtained mean lifetime tau =7.53+or-0.15 ns with earlier measurements confirms the results of the photon-photon delayed-coincidence technique.

Journal of Physics B Atomic and Molecular PhysicsJan 28, 198110 citations

Optics Communications

High-resolution spectroscopy on a fast beam of metastable xenon ions

Th. Meier, Harry Hühnermann, Hermann Wagner

Published Mar 1, 1977• 37 citations

Publisher

DOI: 10.1016/0030-4018(77)90213-9

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High-Resolution Spectroscopy of the X-A Transition of the Carbon Monoxide Dication CO

^{2+}

We report rovibronic spectra of the A

^3Σ^+

(

v'=0-2

) - X

^3Π_Ω(v=0)

rovibronic transitions (

|Ω|=0, 1

and 2) of the CO

^{2+}

doubly-charged molecular ion. Spectra were recorded at high resolution (

\sim 5

~cm

^{-1}

) in a fast beam of CO

^{2+}

molecules by detecting the Coulomb explosion of the molecules upon excitation to the A state. Measurements were guided by \textit{ab initio} calculations which then assisted the assignment of the observed spectral features. Our results resolve the spin-orbit splittings of the ground vibronic state X

^3Π_Ω(v=0)

, but not the rotational structure of the bands due to spectral congestion, and provide spectroscopic information on CO

^{2+}

with unprecedented resolution. In doing so they expand our knowledge of this benchmark doubly charged molecular ion and expand the short list of doubly charged molecules studied at high resolution.