Study of the photoionization and dissociation mechanisms of polyatomic molecules of atmospheric and biological interest using synchrotron radiation in the vacuum ultraviolet and X-rays regions

• Grant number: 05/04767-8
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: April 01, 2006
• End date: March 31, 2008
• Field of knowledge: Physical Sciences and Mathematics - Physics - Atomic and Molecular Physics
• Principal Investigator: Arnaldo Naves de Brito
• Grantee: Alexsandre Figueiredo Lago
• Host Institution: Associação Brasileira de Tecnologia de Luz Síncrotron (ABTLuS). Ministério da Ciência, Tecnologia e Inovação (Brasil). Campinas , SP, Brazil

Abstract

This proposal is concerned with the study of the electronic excitation and the ionic dissociation mechanisms of polyatomic molecules of atmospheric ( halogenated molecules and ozone) and biological ( amino acids and small organic molecules) interest by using synchrotron radiation at the LNLS as ionizing agent, in the energy range from VUV to X-rays. The combination of this powerful radiation source with the TOF-MS and electron-ion coincidence experimental techniques represents the basic tools for the proposed studies. We also propose the development and construction of an experimental set-up based on the Threshold Photoelectron Photoion coincidence technique (TPEPICO) for dissociation dynamics investigations. This project is also intended for application to the new ondulator based beamline under construction at the LNLS, which will provide new perspectives on the investigation of the dissociation mechanisms of polyatomic molecules and make possible the identification and study of relevant processes associated with low intensity channels. (AU)