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Resonantly laser induced plasmas in gases : The role of energy pooling and exothermic collisions in plasma breakdown and heating (CROSBI ID 151860)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Vadla, Čedomil ; Horvatić, Vlasta ; Veža, Damir ; Niemax, Kay Resonantly laser induced plasmas in gases : The role of energy pooling and exothermic collisions in plasma breakdown and heating // Spectrochimica acta. Part B, Atomic spectroscopy, 65 (2010), 1; 33-45. doi: 10.1016/j.sab.2009.10.010

Podaci o odgovornosti

Vadla, Čedomil ; Horvatić, Vlasta ; Veža, Damir ; Niemax, Kay

engleski

Resonantly laser induced plasmas in gases : The role of energy pooling and exothermic collisions in plasma breakdown and heating

The present work is a systematic experimental study of the plasma formation in cesium vapor induced by a continuous laser tuned to the resonance transition 6S1/2 – 6P3/2. Taking into account the measured absolute population densities of Cs ground and excited state atoms as well as the electron densities derived from Stark broadening of the Cs lines, complete local thermodynamic equilibrium in the laser produced plasma was found for laser power densities ~10 Wcm^-2 at cesium ground state number densities of about 10^17 cm^-3. Direct conversion of the excitation energy or parts of the excitation energy in exothermic collisions of laser-excited atoms is concluded to be the major process for atomic vapor heating and subsequent formation of LTE plasmas.

laser produced plasma; resonance pumping; resonant LIBS

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Podaci o izdanju

65 (1)

2010.

33-45

objavljeno

0584-8547

10.1016/j.sab.2009.10.010

Povezanost rada

Fizika

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