Temperature and Electron Density Determination on Laser-Induced Breakdown Spectroscopy (LIBS) Plasmas: A Physical Chemistry Experiment

Autor:	Maya L. Najarian, Rosemarie C. Chinni
Rok vydání:	2012
Předmět:	Electron density Chemistry General Chemistry Atomic spectroscopy Plasma Laser Education law.invention symbols.namesake Stark effect Physics::Plasma Physics law symbols Physical chemistry Plasma diagnostics Laser-induced breakdown spectroscopy Spectroscopy
Zdroj:	Journal of Chemical Education. 90:244-247
ISSN:	1938-1328 0021-9584
DOI:	10.1021/ed3003385
Popis:	This laboratory is designed for physical chemistry students to gain experience using laser-induced breakdown spectroscopy (LIBS) in understanding plasma diagnostics. LIBS uses a high-powered laser that is focused on the sample causing a plasma to form. The emission of this plasma is then spectrally resolved and detected. Temperature and electron number density of the plasma can be determined from the characteristics of the spectrum. Temperature was calculated using the Boltzmann plot method, whereas electron density was determined from Stark broadening considerations. Students learned how to use the information provided by the LIBS spectrum to obtain plasma temperatures and electron densities for various samples. This experiment is appropriate for a physical chemistry course.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3d7f71d066fa1f4602a5a0dad67c3143 https://doi.org/10.1021/ed3003385 Zobrazit plný text záznamu