1. Institute de Physique Experimentale, Ecole Polytechnique Federale de Lausanne, PHB Ecublens, CH-1015 Lausanne, Switzerland
2. Institute de Chimie Physique, Ecole Polytechnique Federale de Lausanne, PHB Ecublens, CH-1015 Lausanne, Switzerland
3. Institute de Genie Atomique, Ecole Polytechnique Federale de Lausanne, PHB Ecublens, CH-1015 Lausanne, Switzerland
4. Laboratório Nacional de Luz Síncrotron (CNPq/MCT), Cx. Postal 6192, 13081-970 Campinas SP, Brazil