Search results for "Ambient ionization"

showing 3 items of 13 documents

Selective laser ionization of radioactive Ni-isotopes

1997

Abstract A chemically selective laser ion source based on resonance ionization of atoms in a hot cavity has been applied in the study of Ni-isotopes at the CERN-ISOLDE on-line isotope separator. Laser ionization enhanced the yields of long-lived Ni-isotopes almost four orders of magnitude when compared to the yields obtained with the surface ionization mode of the source. As a result, high yields of long-lived Ni-isotopes were obtained. Separation efficiencies of 0.3 and 0.8% were obtained for Ni produced in uranium-carbide, produced from uranium-di-pthalocyanine, and Ta-foil targets, respectively. Ni was found to be released very slowly from the present target and ion source combination.

Nuclear and High Energy PhysicsChemical ionizationMatrix-assisted laser desorption electrospray ionizationChemistryRadiochemistryAnalytical chemistryThermal ionizationIon sourceAtmospheric-pressure laser ionizationIonizationPhysics::Atomic PhysicsNuclear ExperimentInstrumentationElectron ionizationAmbient ionizationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Radiation detected resonance ionization spectroscopy on208Tl and242fAm

1993

An ultra-sensitive laser spectroscopic method has been developed for the hyperfine spectroscopy of short-lived isotopes far off stability produced by heavy ion induced nuclear reactions at very weak intensity (> 1/s). It is based on resonance ionization spectroscopy in a buffer gas cell with radiation detection of the ionization process (RADRIS). As a first on-line application of RADRIS optical spectroscopy at242fAm fission isomers is in progress at the low target production rate of 10/s. The resonance ionization has been performed in two steps utilizing an excimer dye laser combination with a repetition rate of 300 Hz. The first resonant step proceeds through terms which correspond to wave…

Nuclear and High Energy PhysicsDye laserExcimer laserChemistrymedicine.medical_treatmentAnalytical chemistryResonanceCondensed Matter PhysicsAtomic and Molecular Physics and OpticsIon sourceAtmospheric-pressure laser ionizationIonizationmedicinePhysical and Theoretical ChemistryAtomic physicsSpectroscopyAmbient ionizationHyperfine Interactions
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Development of resonance ionization in a supersonic gas-jet for studies of short-lived and long-lived radioactive nuclei

2013

High-resolution resonance ionization spectroscopy (RIS) is required for laser spectroscopy and trace analysis of short-lived and long-lived radioactive nuclei. We have proposed high-resolution resonance ionization spectroscopy in a gas jet combined with a narrow band-width injection-locked Ti:Sapphire laser. Resonance ionization of stable 93Nb in a gas jet was demonstrated using a broad bandwidth Ti:Sapphire laser. In addition, a setup for high-resolution RIS in a gas-jet was designed using numerical simulations of the gas-jet conditions based on computational fluid dynamics.

Nuclear and High Energy PhysicsJet (fluid)ta114ChemistryThermal ionizationInstrumental chemistryIon sourceAtmospheric-pressure laser ionizationPhysics::Atomic PhysicsAtomic physicsSpectroscopyInstrumentationElectron ionizationAmbient ionizationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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