Alignment and orientation of charge exchange excitation with polarized projectiles

Abstract

The alignment and orientation of hydrogenlike excited atoms produced by electron capture in collisions of spin polarized bare atomic nuclei with atomic targets is described in terms of Stokes parameters. The H(2p)* excited state formed by spin polarized protons making charge exchange collisions on atomic targets is dealt with extensively for the purpose of illustration. The linear polarization and circular polarization of resulting Lyman-c~ when polarized protons make electron capture collision on atomic hydrogen target are plotted to compare observable aspects of different theories of electron capture.

Orientation of 1s electrons using tilted foils

“…Beams of oriented † ions have numerous applications in atomic physics experiments, including measurements of atomic structure and studies of collisions with atoms or electrons [1,2]. Many different methods are employed for producing beams of oriented ions, such as direct optical pumping [3], scattering off of magnetic surfaces [4], transmission through magnetic layers [5,6], charge exchange in spin-polarized targets [7][8][9][10][11][12][13][14], transmission through tilted foils [15][16][17][18][19][20], scattering from inclined surfaces [21][22][23][24] and use of multitilted foils or surfaces [21,[25][26][27][28][29][30][31].…”

Threshold Alignment Reversal and Circularly Polarized Fluorescence in Rotationally ResolvedH2

“…Depolarization effects can be treated with the formalism of ''generalized perturbation coefficients'' using coupled state multipoles for three systems: N, S, and I [25,26]. In H 2 and D 2 , Hund's case (b) coupling is a reasonable starting point, since N ¼ à þ R (where à is the projection of the electronic orbital angular momentum on the internuclear axis and R is the nuclear rotational angular momentum) is a good quantum number.…”