Naslov
Collision cross sections for excitation energy transfer in Na* (3P 1/2)+K(4S 1/2)⇔Na*(3P 3/2)+K(4S 1/2) processes

Autori
Horvatic, Vlasta ; Veža, Damir ; Movre, Mladen ; Niemax, Kay ; Vadla, Čedomil

Izvornik
Zeitschrift für Physik. D, Atoms, molecules and clusters (0178-7683) 34 (1995), 3; 163-170

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
excitation transfer ; sodium ; potassium

Sažetak
The cross sections for the excitation energy transfer between the 3 2PJ states of sodium atoms by collisions with ground-state potassium atoms have been measured by resonant Doppler-free two-photon spectroscopy, where the population densities of directly pumped and collisionally excited Na(3PJ) (J=1/2, 3/2) levels were probed by counter- propagating Na(3PJ)->Na(4D3/2, 5/2) excitation and detected with the thermionic diode. Cross sections of sigma(3P1/2/>3P3/2)=190 Å ; 2± ; 20% and sigma(3P3/2/>3P1/2)=100 Å ; 2± ; 20% were found. The theoretical calculations taking into account the long- range interaction terms R– 6, R– 8 and R– 10 yield a value sigma(3P1/2/>3P3/2)=165 Å ; 2. On the basis of these long- range interaction potentials the differential cross section has been calculated and compared with recently published experimental data. Very good agreement between the theoretical and experimental data was found.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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