Cross Sections for l-Mixing of K(n2F) States in Collisions with Ground-State K(42S) Atoms

M. Głódźa, A. Huzandrova, J. Klavinsb, I. Sydorykc, J. Szonerta, S. Gateva-Kostovac and K. Kowalskia,d aInstitute of Physics, Polish Academy of Sciences Al. Lotników 32/46, 02-668 Warszawa, Poland bInstitute of Atomic Physics and Spectroscopy, University of Latvia, Riga, 1586, Latvia cInstitute of Electronics, BAS, 1784 Sofia, Boul. Tsarigradsko Shosse 72, Bulgaria dCollege of Science, Al. Lotników 32/46, 02-668 Warszawa, Poland

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Received: August 3, 2000

We report measurements of the cross sections σl-mix for angular momentum mixing of the K(n2F)(n=6, 7, 8) states with the K(n,l > 3) states, induced in thermal collisions with parent ground state K(42S) atoms. The experiment was performed in a cell heated to ca. 450K. The n2F states were excited in two steps: 42S → 42P → n2F by using a diode laser for the first step (a dipole-transition) and a pulsed dye laser for the second step (a quadrupole-transition). The measured values σl-mix (62F)=3.6+-2.2, σl-mix (72F)=4.2+-2.6 and σl-mix (82F)=8.0+-4.6 (in units of 10-13cm-1) are close to the corresponding values of the geometrical cross sections.

DOI: 10.12693/APhysPolA.98.353 PACS numbers: 34.50.Fa