0000000000297094

AUTHOR

K. Wallmeroth

showing 6 related works from this author

Laser resonant ionization of plutonium

1985

Resonance ionization mass spectrometry (RIMS) has been tested for the isotope-selective determination of trace amounts of plutonium. An atomic beam is formed by evaporating plutonium atoms from a rhenium-filament heated to 1800 °C. The radiation of a pulsed dye laser excites the atoms in a two-photon process (λ=595.2 nm) followed by photoionization of the excited atoms. Mass selectivity is obtained by use of a time-of-flight spectrometer. A resonant signal of239Pu was measured with 1013 atoms deposited on the filament.

Dye laserMaterials sciencePhysics and Astronomy (miscellaneous)SpectrometerGeneral EngineeringGeneral Physics and AstronomyResonancechemistry.chemical_elementPhotoionizationLaserMass spectrometrylaw.inventionPlutoniumchemistrylawIonizationPhysics::Atomic and Molecular ClustersPhysics::Atomic PhysicsAtomic physicsApplied Physics B Photophysics and Laser Chemistry
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Nuclear shape transition in neutron-deficient gold isotopes

1987

4 pages, 1 table, 4 figures.

Nuclear and High Energy PhysicsIsotopeChemistryPhotoionizationCondensed Matter PhysicsMass spectrometryAtomic and Molecular Physics and OpticsEffective nuclear chargeIonizationPhysics::Atomic and Molecular ClustersNuclear Physics - ExperimentNeutronPhysics::Atomic PhysicsIsotopes of goldPhysical and Theoretical ChemistryAtomic physicsNuclear ExperimentHyperfine structure
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Determination of the isotope shift in theD 1 line between197Au and195Au

1983

The isotope shift between197Au (stable) and195Au (T 1/2=183 d) was determined by resonance fluorescence and polarization spectroscopy in the 6s2 S 1/2 -6p 2 P 1/2, λ =267.6nm line. The result is δν195, 197=-2.9(2) GHz corresponding to a change of the mean-square charge radius by δ〈r 2〉195, 197=0.063(9) fm2. The sample was confined to a resonance cell heated to temperatures of up to 1500°C.

Nuclear and High Energy PhysicsMaterials scienceIsotopeResonance fluorescenceCharge radiusAnalytical chemistryNuclear fusionPolarization (waves)SpectroscopyD-1Zeitschrift f�r Physik A Atoms and Nuclei
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Isotope shifts of neutron-deficient gold isotopes with 193?A?190

1985

The isotope shift between197Au (stable) and the radioactive Au isotopes190Au,191Au,192Au and193Au were determined by resonance fluorescence spectroscopy in the 6s2S1/2–6p2P1/2.λ=267.6nm line. The unstable Au isotopes were produced at the ISOLDE mass separator at CERN. The nuclei were investigated semi on-line in a resonance vessel, heated to 1,400°C. The results areδν190,197=−11.12(39) GHz,δν191,197=−9.67(12) GHz,δν192,197=−8.32(15) GHz,δν193,197=−6.29(11) GHz, corresponding to a change of the mean-square charge radius byδ〈r2〉190,197 =0.261(12) fm2,δ〈r2〉191,197=0.227(5) fm2,δ〈r2〉192,197=0.195(5) fm2,δ〈r2〉193,197 =0.148(4) fm2.

PhysicsNuclear and High Energy PhysicsIsotopeResonance fluorescenceKinetic isotope effectAnalytical chemistryResonanceNeutronIsotopes of goldSpectroscopyMolecular electronic transitionZeitschrift f�r Physik A Atoms and Nuclei
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High-power pulsed dye laser with Fourier-limited bandwidth

1986

A high-peak-power, narrow-linewidth light source with a homogeneous beam profile has been constructed by modifications to a commercially available pulsed-dye-laser system. Output pulses of up to 10 mJ were generated with linewidths of about 50 MHz for 12-nsec pulses. The pulse-to-pulse frequency stability was better than the linewidth, and the center frequency could be scanned over a frequency range of 142.5 GHz at a wavelength of 600 nm. The performance of the system was demonstrated by observing the 6s2 1S0–6s7s1S0 transition in atomic mercury at 2λ = 312.8 nm and the 6s2S1/2–8s2S1/2 transition in atomic gold at 2λ = 308.9 nm using up to 1 mJ of frequency-doubled output for two-photon non…

Materials scienceDye laserbusiness.industryStatistical and Nonlinear PhysicsLaserAtomic and Molecular Physics and Opticslaw.inventionLaser linewidthWavelengthOpticslawExcited stateOptoelectronicsDetectors and Experimental TechniquesCenter frequencySpectroscopybusinessHyperfine structureJournal of the Optical Society of America B
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Sudden change in the nuclear charge distribution of very light gold isotopes

1987

4 pages, 3 tables, 2 figures.-- PACS nrs.: 21.10.Ft, 21.10.Ky, 27.70.+q.

PhysicsGeneral Physics and AstronomyCharge densityRadiusPhotoionizationEffective nuclear chargeTime of flight[PACS] Electromagnetic momentsIonization[PACS] Charge distribution150 ≤ A ≤ 189 [[PACS] Properties of specific nuclei listed by mass ranges]Nuclear Physics - ExperimentPhysics::Atomic PhysicsIsotopes of gold[PACS] Properties of specific nuclei listed by mass ranges:150 ≤ A ≤ 189Atomic physicsHyperfine structure
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