$n$ Dependence of $l$ -Changing Collisions between ${He}^{+}$ Ions and Na

Publisher Website

14 April 1980

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 44 (15) , 980-983
https://doi.org/10.1103/physrevlett.44.980

Abstract

l

-changing collisions were observed in a crossed

{He}^{+}

-ion/Na-Rydberg-atom beam experiment. Transitions

nd \to n (l >~ 3)

induced in Na by ion impact at 450 and 600 eV were studied for

n = 20 - 34

. Cross sections vary approximately as

n^{5}

and have magnitudes of order

10^{8}

Å^{2}

, a few hundred times the geometric cross section of the Rydberg atoms.

Keywords

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