Atomic Emission Spectra Using a UV-Vis Spectrophotometer and an Optical Fiber Guided Light Source

Manuel E. Minas da Piedade
Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, 1096 Lisboa Codex, Portugal
Mário N. Berberan-Santos
Centro de Química-Física Molecular, Complexo I, Instituto Superior Técnico, 1096 Lisboa Codex, Portugal
J. Chem. Educ., 1998, 75 (8), p 1013
DOI: 10.1021/ed075p1013
Publication Date (Web): August 1, 1998

Abstract

The use of an optical fiber guided light source in conjunction with a UV-Vis spectrophotometer to study the emission spectra of atomic hydrogen, sodium and helium in the undergraduate physical chemistry laboratory is described. The observed spectra have sufficient detail to allow an accurate calculation of the Rydberg constants and ionization energies of these elements. The obtained results also provide an opportunity to discuss energy level diagrams, selection rules for transitions, spin-orbit coupling magnitudes, and relative intensities of doublet lines.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Physical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Hydrogen

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This article has been cited by 3 ACS Journal articles (3 most recent appear below).

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  • Received: August 03, 2009

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