1. Department of Physics, Federal University of Minas Gerais, PO Box 702, 30123-970 Belo Horizonte, Minas Gerais, Brazil
2. Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, ul. Grudzia̧dzka 5, Toruń 87-100, Poland
3. Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ 85721, USA
4. CEFET Minas Gerais, 30421-169 Belo Horizonte, Minas Gerais, Brazil
5. Groupe de Spectrométrie Moléculaire et Atmosphérique, UMR CNRS 7331, University of Reims Champagne-Ardenne, 51687 Reims Cedex 2, France