2023-04-202023-04-202016VALVERDE, C.; BASEIA, B.; BAGNATO, V. S. Mecanismos de alargamento de linhas espectrais atômicas. Revista Brasileira de Ensino de Física, São Paulo, v. 38, n. 4, e4302, 2016. DOI: 10.1590/1806-9126-RBEF-2016-0092. Disponível em: https://www.scielo.br/j/rbef/a/QkLc3KWzBSykj4fdnhVnHLf/?format=pdf&lang=pt. Acesso em: 18 abr. 2023.1806-1117e- 1806-9126http://repositorio.bc.ufg.br/handle/ri/22369The energy spectra of idealized atoms (isolated, at rest and temperature 0K) are constituted by a set of very narrow lines. However, in the real world one verifies that each of these lines are enlarged by the action of various types of external influences. A simplified discussion is presented about their mechanisms and how each type of them acts isolated upon a thin spectral line. The case of two or more types of these mechanisms acting conjunctly is also considered. Line narrowing techniques for relevant applications are mentioned, including others using the control of the widths and the shapes of a laser line.porAcesso Abertohttp://creativecommons.org/licenses/by-nc-nd/4.0/Alargamento de linhaLinha do laserAfinamento de linhaLine broadeningLine narrowingLaser lineArtigohttps://doi.org/10.1590/1806-9126-RBEF-2016-0092