Laser excited Li Rydberg atoms in electric and magnetic fields

Multiphoton intrashell transitions in strongly driven Li ( $n=25$ ) Rydberg atoms are studied experimentally. Orthogonal dc electric and magnetic fields lift the degeneracy of the $n$ shell and define the eccentricity $e$ of the initial coherent elliptic states, which are formed by laser excitation and subsequent adiabatic transformation. The intrashell transitions are driven by a time-harmonic electric field linearly polarized parallel to the major axis of the ellipse. $N$ -photon resonances with $N=1\ensuremath{-}9$ are studied as a function of $e$ . All resonances with $N\ensuremath{\geqslant}3$ are suppressed at certain $e$ values in between $0$ and $1$ . A similar system was analyzed by Yabuzaki et al. [Phys. Rev. A 10, 1955 (1974)] who found a simple pattern of suppressions that applies also for the present experiments. The results of these experimentally confirm that each time $N$ is increased by two, an additional suppression is observed.Multiphoton intrashell transitions in strongly driven Li ($n=25$) Rydberg atoms are studied experimentally. Orthogonal dc electric and magnetic fields lift the degeneracy of the $n$ shell and define the eccentricity $e$ of the initial coherent elliptic states, which are formed by laser excitation and subsequent adiabatic transformation. The intrashell transitions are driven by a time-harmonic electric field linearly polarized parallel to the major axis of the ellipse. $N$-photon resonances with $N=1\ensuremath{-}9$ are studied as a function of $e$. All resonances with $N\ensuremath{\geqslant}3$ are suppressed at certain $e$ values in between $0$ and $1$. A similar system was analyzed by Yabuzaki et al. [Phys. Rev. A 10, 1955 (1974)] who found a simple pattern of suppressions that applies also for the present experiments. The results of these experimentally confirm that each time $N$ is increased by two, an additional suppression is observed.

Physical Review AJun 28, 20112 citations

Laser Spectroscopy of Rydberg Atoms in Strong Magnetic Fields

Brenton Knuffman, Cornelius Hempel, Rahul R. Mhaskar +3 more

Bulletin of the American Physical SocietyMay 29, 20080 citations

Electron capture from oriented elliptic Rydberg atoms

Thomas Ehrenreich, J. C. Day, Søren B. Hansen +3 more

Electron capture cross sections for coherent elliptic Rydberg states have been measured as a function of eccentricity. The ion impact velocity was parallel to the minor axis of the associated, classical elliptic orbit and both clockwise and anticlockwise orbital motion of the electron were studied. The incoming ions were 2.5 keV 23 Na + and the Rydberg target, with principal quantum number n=25, was formed by laser excitation of Li atoms with subsequent adiabatic switching of crossed, external electric and magnetic fields. A strong dependence on eccentricity and sense of orbital motion was found.Electron capture cross sections for coherent elliptic Rydberg states have been measured as a function of eccentricity. The ion impact velocity was parallel to the minor axis of the associated, classical elliptic orbit and both clockwise and anticlockwise orbital motion of the electron were studied. The incoming ions were 2.5 keV 23 Na + and the Rydberg target, with principal quantum number n=25, was formed by laser excitation of Li atoms with subsequent adiabatic switching of crossed, external electric and magnetic fields. A strong dependence on eccentricity and sense of orbital motion was found.

Journal of Physics B Atomic Molecular and Optical PhysicsJul 28, 199437 citations

Rydberg atoms in external electric and magnetic fields

Eliane Luc-Koenig, J. M. Lecomte

Jan 1, 19850 citations

Multiphoton intrashell transitions in strongly driven Li (

n=25

) Rydberg atoms are studied experimentally. Orthogonal dc electric and magnetic fields lift the degeneracy of the

n

shell and define the eccentricity

e

of the initial coherent elliptic states, which are formed by laser excitation and subsequent adiabatic transformation. The intrashell transitions are driven by a time-harmonic electric field linearly polarized parallel to the major axis of the ellipse.

N

-photon resonances with $N=1\ensuremath{-}9$ are studied as a function of

e

. All resonances with $N\ensuremath{\geqslant}3$ are suppressed at certain

e

values in between

0

and

1

. A similar system was analyzed by Yabuzaki et al. [Phys. Rev. A 10, 1955 (1974)] who found a simple pattern of suppressions that applies also for the present experiments. The results of these experimentally confirm that each time

N

is increased by two, an additional suppression is observed.