0000000001269566

AUTHOR

I. Strachnov

showing 3 related works from this author

Periodic unmixing of a binary metallic vapor

2005

We report on a type of surface structuring after short pulse laser ablation of a binary alloy. We observe the emergence of a concentric ring structure with changing elemental composition. The composition changes are interpreted by condensation of the ambient ablation vapor due to stress wave excitations in the ablation spot.

Materials sciencemedicine.medical_treatmentPhysics::Medical Physics: Physics [G04] [Physical chemical mathematical & earth Sciences]Binary numberElectromagnetic radiationMolecular physicsMetalOpticsPhysics::Plasma PhysicsPhysics::Atomic and Molecular Clustersmedicineskin and connective tissue diseasesSurface statesLaser ablationbusiness.industryCondensationtechnology industry and agricultureequipment and suppliesCondensed Matter PhysicsAblationElectronic Optical and Magnetic Materials: Physique [G04] [Physique chimie mathématiques & sciences de la terre]visual_artvisual_art.visual_art_mediumsense organsbusinessExcitationPhysical Review B
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Multi-color resonance ionization of laser ablated gadolinium at high laser power

2005

Abstract Spectroscopic and analytical properties of a trace analytical method using multi-step resonance ionization at high laser intensities (>kW/cm 2 ) have been investigated with gadolinium as a test element. Strongly saturated transitions are observed, which have been used for a temperature determination of the atoms in the laser ablated plume. Regimes of multi-step resonance ionization and multiphoton ionization could be distinguished. Analytical performances due to resonance enhancement and resulting discrimination against non-resonant background, precision in isotope ratio determination and overall detection efficiency are discussed.

Materials scienceMatrix-assisted laser desorption electrospray ionizationLaser ablationPhotoionizationLaserAtomic and Molecular Physics and OpticsIon sourceElectronic Optical and Magnetic Materialslaw.inventionAtmospheric-pressure laser ionizationlawIonizationPhysics::Atomic and Molecular ClustersPhysics::Atomic PhysicsLaser power scalingElectrical and Electronic EngineeringPhysical and Theoretical ChemistryAtomic physicsOptics Communications
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A laser desorption/resonance enhanced photoionisation TOF-system for the spatially resolved trace analysis of elements

2004

Abstract A novel method for direct and spatially resolved elemental trace analysis with high sensitivity and elemental selectivity is presented. The concept is based on the combination of a commercial MALDI-TOF mass spectrometer with a pulsed laser system for resonant postionisation of neutrals. While the MALDI method is usually applied for investigations of large organic compounds and biomolecules, the technique discussed here concerns the low mass range around 1 ⩽ A ⩽ 300. The analytical performances of the setup with respect to mass analysis, spatial resolution and overall detection efficiency are discussed.

MALDI imagingNuclear and High Energy PhysicsResolution (mass spectrometry)SpectrometerChemistryAnalytical chemistryResonancePhotoionizationMass spectrometryLaserlaw.inventionlawDesorptionInstrumentationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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