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Application of laser-induced plasma spectroscopy to the measurement of transition probabilities of Ca I
Alonso Medina, Aurelia
Application of laser-induced plasma spectroscopy to the measurement of transition probabilities of Ca I.
"Journal of Spectroscopy and Dynamics", v. 4
||Application of laser-induced plasma spectroscopy to the measurement of transition probabilities of Ca I
|Título de Revista/Publicación:
||Journal of Spectroscopy and Dynamics
||Laser-induced plasma spectroscopy, Transition probabilities, Calcium, Plasma diagnostic
||E.U.I.T. Industrial (UPM)
||Física Aplicada [hasta 2014]
|Creative Commons Licenses:
||Recognition - No derivative works - Non commercial
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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