Electron capture from circular Rydberg atoms

Hansen, S. B.; Ehrenreich, T.; Horsdal-Pedersen, E; MacAdam, K. B.

doi:10.1063/1.45251

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This pattern is independent of v r , but the ratio between the minimum and the maximum values of the cross section (σ cir ⊥ /σ cir ) depends strongly on v r and shows a clear minimum near v r = 1.6, as seen in figure 5. The minimum was observed and discussed earlier [7,27,46]. Unfortunately, the two sets of data do not seem to agree at a few points near or below the minimum.…”

Section: 22mentioning

confidence: 77%

Electron capture from elliptic Rydberg states: impact perpendicular to the minor axis

Kristensen¹,

Bové²,

DePaola³

et al. 2000

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

The total cross section, σ , for electron capture by Na + ions from oriented coherent elliptic states (CES) of Li with principal quantum number n = 25 was studied experimentally for impact perpendicular to the minor axis of the elliptic orbit. The remaining geometrical parameters of the CES, which are the eccentricity, e, and the angle, ϕ, between the major axis and the beam direction, were varied in the course of the experiments, as was the reduced impact velocity v r = nv, where v is the projectile velocity in atomic units. Several representative cuts were chosen within the parameter space (v r , e, ϕ) = (0.74-2.09, 0-1, 0-2π ). The velocity range includes the region of matching velocities (v r 1) where σ for given geometrical parameters attains its maximum value and the high-velocity region where σ is a strongly decreasing function of v r . The cross section depends sensitively on each geometrical parameter, and the dependences change dramatically as v r is varied. The spatial distribution of the CES apparently governs σ in some region of parameter space (v r , e, ϕ) and in another the momentum distribution prevails.

show abstract

Section: 22mentioning

confidence: 77%

Electron capture from elliptic Rydberg states: impact perpendicular to the minor axis

Kristensen¹,

Bové²,

DePaola³

et al. 2000

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

show abstract

“…space, the states are concentrated near circular paths with the nucleus shifted off from the centre by a distance proportional to e. The extreme degree by which these states can be controlled from the outside makes them very useful for detailed studies of ion-atom collisions. Classical aspects of the charge transfer reaction are of particular interest due to the semiclassical character of the initial states (Kohring et al 1983, Wang and Olson 1993, Spruch 1978, Shakeshaft and Spruch 1979, Dub6 and Briggs 1981, Dub6 1986, Hansen et al 1993a.…”

mentioning

confidence: 99%

Electron capture from oriented elliptic Rydberg atoms

Ehrenreich

Day

Hansen

et al. 1994

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

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 23Na+ 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.

show abstract

“…In a recent paper [1] Hansen et al reported electron capture cross sections from circular Rydberg states as a function of the angle y between the ion velocity and the angular momentum of the circular orbital. They studied the collision of 2.5 keV Na+ on the Rydberg state of Li with n=25, l =n -1 and m=+l, where m is de6ned relative to a weak, external magnetic field.…”

mentioning

confidence: 99%

“…Before we draw the conclusion, it is interesting to note that the mathematical expression for the y dependence takes the simpler form [1] if the quantization axis in chosen to be along the beam direction. However, the density matrix p in this reference kame does not disclose any propensity rule, and a large range of m values contributes to the summation in Eq.…”

mentioning

confidence: 99%