Polarization of the BaO* chemiluminescence from the Ba(hyperthermal) + N2O - BaO* + N2 reaction: rotational alignment effects

M. ROSSA; C. A. RINALDI; J. C. FERRERO

Salvador, Brasil

Congreso; XXVI Congreso Latinoamericano de Química / 27a Reunião Anual da Sociedade Brasileira de Química; 2004

Sociedade Brasileira de Química

A beam of excited Ba atoms, with kinetic energies in the range 0.5 - 0.7 eV, produced by laser ablation reacts with N₂0, in a gas-beam configuration. The reaction product is BaO(¹S⁺). The analysis of the emission from this species shows that it corresponds to the transition A ¹S⁺ ¬ X  ¹S⁺. The parallel and perpendicular components of the chemiluminescence was studied as a function of the laser fluence and shows a strong polarization. The results are analysed in terms of the kinetic energy and the electronic states of Ba.