Coloquio Extraordinario ICF - Dr. Marcelo M. Sant'Anna скачать в хорошем качестве

Coloquio Extraordinario ICF - Dr. Marcelo M. Sant'Anna

Título: "Infrared Light Revealing Vibrations on Solid Materials: From the Laboratory to Space" Ponente: Dr. Marcelo M. Sant'Anna - Universidad Federal de Rio de Janeiro Resumen: Observing infrared radiation interacting with a solid allows us to probe characteristic vibrational modes of that solid. This makes it possible to access the structure of a solid even if it is outside planet Earth. The analysis of this information, collected by telescopes operating in the infrared range, depends on previous experiments carried out in a laboratory. In this seminar we will examine how measurements of electromagnetic radiation absorption in the infrared range can reveal information about the structure of molecular ices. In these materials, each site of the crystal lattice contains a molecule, and not simply an atom. Their spectra show characteristics of solid samples combined with those of gaseous samples. The degree of disorder [1] in these samples is studied in the laboratory by combining two approaches: (i) varying the growth temperature of films of these ices and (ii) irradiating these films with beams of energetic ions produced by an ion accelerator [2]. Videoconferencia grabada en vivo en el Auditorio del Instituto de Ciencias Físicas de la UNAM Campus Morelos el viernes 07 de noviembre de 2025. Más información en: www.fis.unam.mx/coloquios/754