Molybdenum electron impact width parameter measurement by laser-induced breakdown spectroscopy

Sternberg, E. M. A.; Rodrigues, N. A. S.; Amorim, J.

doi:10.1007/s00340-015-6298-3

Cited by 8 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To overcome this drawback, Sternberg et al. 18 suggested a simple approach to obtain the electron impact parameter directly from laser ablation experiments. Using laser-induced breakdown spectroscopy (LIBS), both SBA and StB methods are applied to the recorded emission spectra.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Dysprosium Stark Width and the Electron Impact Width Parameter

Santos

Neto²,

Rodrigues

et al. 2018

Appl Spectrosc

View full text Add to dashboard Cite

In this work, we suggest a methodology to determine the impact parameter for neutral dysprosium emission lines from the characterization of the plasma generated by laser ablation in a sealed chamber filled with argon. The procedure is a combination of known consistent spectroscopic methods for plasma temperature determination, electron density, and species concentration. With an electron density of 3.1 × 1018 cm–3 and temperature close to 104 K, we estimated the impact electron parameter for nine spectral lines of the neutral dysprosium atom. The gaps in the impact parameter data in the literature, mainly for heavy elements, stress the importance of the proposed method.

show abstract

Section: Introductionmentioning

confidence: 99%

Measurement of Dysprosium Stark Width and the Electron Impact Width Parameter

Santos

Neto²,

Rodrigues

et al. 2018

Appl Spectrosc

View full text Add to dashboard Cite

show abstract

“…The electron densities have been determined from Stark broadened line profile of an isolated line of neutral atoms using eq (1). From the experimental results of electron impact width parameter of Mo lines was measured as (0.01±0.02 nm) [17]. The electron density can be determined using the Stark broadening of the spectral lines.…”

Section: Measurement Of Plasma Electron Density (N E )mentioning

confidence: 99%

Spectroscopy Measurements of Laser-Induced Molybdenum Plasma

Abdrabou

Khedr

Fathi

et al. 2018

Arab Journal of Nuclear Sciences and Applications

View full text Add to dashboard Cite

Molybdenum plasma in air at atmospheric pressure was carried out by utilizing Nd-YAG laser at fundamental wavelength 1064 nm, 0.206 mJ input energy, 5 ns pulse duration and repetition rate 10 Hz. After plasma formation, the optical fiber was used to collect plasma emission. The spectral analysis was displayed in the Local Thermal Equilibrium (LTE) state. Electron temperature was estimated by Boltzmann plot method and electron density was calculated from Stark broadening and compared with electron density of Hα-line at 656.3 nm which has reliable values. The temperature of plasma and density were evaluated for different positions along the expansion axis. The influence of the input power on plasma was studied. The electron density varied from 5 ×10 18 to 3.5×10 19 cm -3 . These parameters are important in environmental and industrial application. At distance of 10 mm from the target, the electron temperature has a minimum value while the electron density shows a maximum value.

show abstract

“…If it can be reputable that the experimental line broadening is mainly due Stark and instrumental broadening mechanisms fitted by lorentzian profile and, once electron density was determined by Saha-Boltzmann equation, Stark broadening expression permits to determine the electron impact width parameter. For 273.339 nm molybdenum plasma emission line expanding on air at atmospheric pressure and temperature nearly 8000 K, the electron impact width parameter was measured equal to (0.017±0.008) nm [6].…”

Section: Introductionmentioning

confidence: 99%

“…A preliminary step to implement the suggested method is the generation and characterization of a laser-ablated plasma plume. Laser induced breakdown spectroscopy of molybdenum can determine expansion speed and lifetime [4] after laser pulse of plasma jet, the portion of neutral and ionized species which constitutes the plasma, electronic population distribution [5], dynamics of plume expansion [4], electron density, temperature and electron impact width parameter [6].…”

Section: Introductionmentioning

confidence: 99%