All-Experimental Values of Self-Quenching Cross-Sections for nf States (n = 5-8) of Potassium Atoms

M. Głódź a, A. Huzandrov a, I. Sydoryk a, J. Szonert a and J. Klavins b a Institute of Physics, Polish Academy of Sciences al. Lotników 32/46, 02-668 Warszawa, Poland b Institute of Atomic Physics and Spectroscopy University of Latvia, Riga, 1586, Latvia

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Received: 17 10 2007; In final form: 27 11 2007;

All-experimental self-quenching cross-sections σnfq are reported for K(nf) states (n=5, 6, 7, 8). The experiment was performed at varied temperatures of K vapour in a spectral cell. Time-resolved fluorescence was observed following pulsed step-wise excitation with dipole and quadrupole transitions K(4s)→ K(4p)→ K(nf). The values: σ5fq=2.4±1.7, σ 6fq=4.5±1.4, σ 7fq=8.1±1.8, and σ 8fq=18.2±3.0 (in units of 10-13 cm-1) were obtained from Stern-Volmer-type plots.

DOI: 10.12693/APhysPolA.112.1185 PACS numbers: 32.50.+d, 32.80.Cy