A5102796930- Laser-induced spectroscopy and plasma
- Atomic and Molecular Physics
- Analytical chemistry methods development
- Advanced Chemical Physics Studies
- Spectroscopy and Laser Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Laser Design and Applications
- Mass Spectrometry Techniques and Applications
- Mercury impact and mitigation studies
- Spectroscopy and Quantum Chemical Studies
- Ion-surface interactions and analysis
- Photochemistry and Electron Transfer Studies
- Laser-Ablation Synthesis of Nanoparticles
- Quantum Mechanics and Non-Hermitian Physics
- Scientific Measurement and Uncertainty Evaluation
- Plasma Applications and Diagnostics
- Molecular Spectroscopy and Structure
- Synthesis and bioactivity of alkaloids
- Diamond and Carbon-based Materials Research
- Luminescence and Fluorescent Materials
- Various Chemistry Research Topics
- Cultural Heritage Materials Analysis
- Metal complexes synthesis and properties
- Laser Material Processing Techniques
Western Illinois University
2024
Universidad Autónoma de Madrid
2011-2023
Large-scale plasma produced in nitrogen gas at room temperature and pressures ranging from 4 × 10 3 to 1.2 5 Pa by high-power laserinduced dielectric breakdown (LIDB) has been investigated.Time-integrated optical spectra excited a CO 2 laser have measured analysed.The spectrum of the generated is dominated emission strong N + very weak 2+ atomic lines molecular features ofand B g -A u .The relative intensities 0-0 band heads (C-B) (B-X) systems are as compared with chemiluminescence formed...
Time-resolved optical emission spectroscopy (OES) is used to analyze a mesh-initiated air breakdown plasma induced by transverse excitation atmospheric CO2 pulsed laser (λ=10.591 μm, 64 ns (full width at half maximum), 70–160 J/cm2). Emission from excited N, O, C, H, and Ar; ionic fragment N+, O+, N2+, O2+, C+, molecular band systems of N2+(B Σ2u+−X Σ2g+; D Π2g−A Π2u), N2(C Π3u−B Π3g), OH(A Σ2+−X Π2) observed. Plasma characteristics are examined in detail on the lines C time-resolved OES...
Optical emission spectroscopy studies, in the spectral range ultraviolet–visible–near infrared (UV–Vis–NIR), were performed to investigate thermal and dynamical properties of a plume produced by laser ablation graphite target. Ablation is carried out using high-power IR CO2 pulsed at λ = 9.621 µm, power density ranging from 0.22 5.36 GW cm−2 air pressures around 4 Pa. The strong observed plasma region mainly due electronic relaxation excited C, ionic fragments C+, C2+ C3+ molecular features...
Laser-induced breakdown (LIB) spectroscopy in oxygen at room temperature and pressures ranging from 4.6 to 75 kPa was studied using a high-power transverse excitation atmospheric CO 2 laser (λ = 9.621 10.591 µm; τ FWHM 64 ns; power densities 0.87 6.31 GW cm -2 ).The spectrum of the generated plasma is dominated by emission strong O, O + weak 2+ atomic lines.Excitation temperatures 31 500 ± 1600 K 23 000 3000 were estimated means ionic lines, respectively.Electron number order (3.5-16.5)× 10...
Time-resolved optical emission measurements have been made in laser-induced plasma plumes following CO2 pulsed-laser (10.591 μm, 64 ns and intensity from 0.27 to 4.9 GW cm−2) irradiation of germanium targets. The temporal behavior Ge atoms ionized excited species Ge3+, Ge2+, Ge+ is reported. results show a faster decay the continuum Ge2+ ionic than case neutral atoms. velocity distributions for Ge+, are obtained time-of-flight measurements. Electron density was estimated analysis spectral...
Spatially and temporally resolved optical emission spectroscopy has been used to study plasmas formed by 1064 nm pulsed laser ablation of silver targets in a vacuum.
Spectroscopic studies on the hydrogen-bonding interactions of norharmane with acetic acid (AcH), a proton acceptor/donor molecule, have been carried out in two non-polar solvents (benzene and p-dioxane) polar solvent (acetonitrile). The steady non-steady photophysical results show three different kinds norharmane/AcH hydrogen-bonded complexes first excited state depending nitrogen implied complex formation: 1 ∶ pyridinic complex, pyrrolic 2 pyridinic–pyrrolic complex. In from dependence...
We report here an analysis of the B1Πu → X1Σ+g band system sodium dimer. The body data includes laser-induced emission Na2 consisting discrete molecular fluorescence (107 series) excited by visible lines from argon ion laser and rotational relaxation for strong transitions. In order to enlarge set transitions within this system, which cover both states up dissociation, results were combined with spectroscopic experimental available in literature. obtained Dunham coefficients used derive...
Time-resolved optical emission analysis was carried out for the plasma plume, produced by high-power tunable IR CO2 pulsed laser ablation of graphite, at λ=10.591 μm and in a regime relatively high fluences (123–402 J/cm2). Wavelength-dispersed spectra medium-vacuum conditions (4 Pa) 9.0 mm from target, show ionized species (C+, C2+, C3+, C4+, N2+ , N+, O+), neutral atoms (C, H, N, O), diatomic molecules (C2, CN, OH, CH, N2). In this work, we focus our attention on temporal evolution...
This paper reports studies on time-resolved laser induced breakdown spectroscopy (LIBS) of plasmas by Nd:YAG pulses a sample lyophilized from swine muscle tissue.