VIBRATIONAL AND ROTATIONAL ENERGY TRANSFER IN A 2SIGMA+ STATE OF OH RADICALS MEASURED BY LASER INDUCED FLUORESCENCE

• Autoři: VORÁČ Jan; PROCHÁZKA Vojtěch; DVOŘÁK Pavel
• Rok publikování: 2012
• Druh: Článek v odborném periodiku
• Časopis / Zdroj: Chem Listy
• Fakulta / Pracoviště MU: Přírodovědecká fakulta
• www: http://www.chemicke-listy.cz/common/content-issue_s5-volume_106-year_2012.html
• Obor: Fyzika plazmatu a výboje v plynech
• Klíčová slova: LIF; OH; hydroxyl; plasma pencil
• Popis: Laser induced fluorescence was used for detection of OH radicals in atmospheric pressure RF discharge ignited in argon in the so-called plasma pencil. Vibrational and rotational energy transfers in the excited states A 2 Sigma (v=0,1) together with appropriate life-times were studied. Since argon is relatively uneffective quencher, lifetimes of the excited states in plasma pencil are in the order of tens of nanoseconds, which is appreciably longer than the laser pulse. It was shown that the RET rate in plasma pencil is very high. Therefore, the rotational energy distribution of the excited state can be considered to be well thermalized.

Související projekty

• CEPLANT - Regionální VaV centrum pro nízkonákladové plazmové a nanotechnologické povrchové úpravy