Application of laser-induced plasma spectroscopy to the measurement of transition probabilities of Ca I

Alonso Medina, Aurelia (2014). Application of laser-induced plasma spectroscopy to the measurement of transition probabilities of Ca I. "Journal of Spectroscopy and Dynamics", v. 4 (n. 15); pp. 1-9. ISSN 2249-2704.

Descripción

Título: Application of laser-induced plasma spectroscopy to the measurement of transition probabilities of Ca I
Autor/es:
  • Alonso Medina, Aurelia
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of Spectroscopy and Dynamics
Fecha: 2014
Volumen: 4
Materias:
Palabras Clave Informales: Laser-induced plasma spectroscopy, Transition probabilities, Calcium, Plasma diagnostic
Escuela: E.U.I.T. Industrial (UPM) [antigua denominación]
Departamento: Física Aplicada [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

We present improved experimental transition probabilities for the optical Ca I 4s4p-4s4d and 4s4p-4p2multiplets. The values were determined with an absolute uncertainty of 10%. Transition probabilities have been determined by the branching ratios from the measurement of relative line intensities emitted by laser-induced plasma (LIP). The line intensities were obtained with the target (leadcalcium) placed in argon atmosphere at 6 Torr, recorded at a 2.5 µs delay from the laser pulse, which provides appropriate measurement conditions, and analysed between 350.0 and 550.0 nm. They are measured when the plasma reaches local thermodynamic equilibrium (LTE). The plasma is characterized by electron temperature (T) of 11400 K and an electron number density (Ne) of 1.1 x 1016 cm-3. The influence self-absorption has been estimated for every line, and plasma homogeneity has been checked. The values obtained were compared with previous experimental values in the literature. The method for measurement of transition probabilities using laser-induced plasma as spectroscopic source has been checked.

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Depositado por: Memoria Investigacion
Depositado el: 25 Oct 2013 08:46
Ultima Modificación: 31 Ene 2016 23:56
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