Banca de DEFESA: RONALDO SOUSA ALVES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RONALDO SOUSA ALVES
DATA : 22/11/2021
HORA: 14:00
LOCAL: Plataforma da conferência WEB RNP
TÍTULO:

PHOTOFRAGMENTATION OF FORMALDEHYDE IN THE VALENCIA REGION

PALAVRAS-CHAVES:

Formaldehyde, photofragmentation, mass spectrometry.

PÁGINAS: 63
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Física
RESUMO:

In this work, we studied the photofragmentation of formaldehyde in the gas phase and in the valence region. We fragment or ionize the sample with photons in the energy range of 10 to 21 eV. The technique used was time-of-flight mass spectrometry, associated with the technique photoelectrons and photoions coincidence, PEPICO. Experimental data were obtained at the National Synchrotron Light Laboratory, in the TGM beamline. We constructed partial ion production (PIY) curves for the main formaldehyde fragments (m/q = 30, 29, 28, 2 and 1) and around the opening energy of each channel. The spectra of the relative production of these ions were also presented in the energy range from 10.70 eV to 21.50 eV. We determined the appearance energies of the main fragments produced and the percentage of ions production in the studied energy range. Our results were analyzed and compared with theoretical and experimental results available in the literature. Overall, our results are in good agreement with the results found in the literature.

MEMBROS DA BANCA:
Interno - 664720 - ANTONIO FERREIRA DA SILVA
Externo à Instituição - CARLOS EDUARDO FELLOWS - UFF
Interno - 1194645 - FREDERICO VASCONCELOS PRUDENTE