0000000000523750

AUTHOR

F. Kern

showing 3 related works from this author

Mass measurements of very high accuracy by time-of-flight ion cyclotron resonance of ions injected into a penning trap

1989

Abstract The possibility of absolute mass measurements using time-of-flight detection of ion cyclotron resonance on ions injected into a Penning trap has been demonstrated. Resolving powers of 2 million have been achieved, with accuracies of about 0.5 ppm. Absolute accuracy is obtained by direct observation of the sum frequency of the cyclotron and the magnetron motions through the use of an azimuthal quadrupole r.f. field to transform initial magnetron motion into cyclotron motion. Imperfections of the Penning trap leading to systematic errors are discussed. The system has been designed specifically to measure the masses of radionuclides produced at the on-line isotope separator ISOLDE. Wi…

ChemistryCyclotronPenning trapFourier transform ion cyclotron resonancelaw.inventionIonTime of flightlawQuadrupoleDetectors and Experimental TechniquesAtomic physicsNuclear ExperimentSpectroscopyRadioactive decayIon cyclotron resonanceInternational Journal of Mass Spectrometry and Ion Processes
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First absolute mass measurements of short-lived isotopes

1987

Absolute mass measurements of short-lived isotopes have been performed at the on-line mass separator ISOLDE at CERN by determining the cyclotron frequencies of ions confined in a Penning trap. The cyclotron frequencies for77,78,85,86,88Rb and88Sr ions could be determined with a resolving power of 3×105 and an accuracy of better than 10−6, which corresponds to 100 keV for massA=100. The shortest-lived isotope under investigation was77Rb with a half-life of 3.7 min. The resonances obtained for the isobars88Rb and88Sr were clearly resolved.

Nuclear and High Energy PhysicsLarge Hadron ColliderIsotopeChemistryShort lived isotopesCyclotronCondensed Matter PhysicsPenning trapAtomic and Molecular Physics and OpticsFourier transform ion cyclotron resonanceIonlaw.inventionlawNuclear Physics - ExperimentPhysical and Theoretical ChemistryAtomic physicsIon cyclotron resonanceHyperfine Interactions
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Accurate mass determination of short-lived isotopes by a tandem Penning-trap mass spectrometer

1990

A mass spectrometer consisting of two Penning traps has been set up for short-lived isotopes at the on-line mass separator ISOLDE at CERN. The ion beam is collected and cooled in the first trap. After delivery to the second trap, high-accuracy direct mass measurements are made by determining the cyclotron frequency of the stored ions. Measurements have been performed for $^{118}--^{137}$Cs. A resolving power of over ${10}^{6}$ and an accuracy of 1.4\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}7}$ have been achieved, corresponding to about 20 keV.

PhysicsIon beamCyclotronCyclotron resonanceGeneral Physics and AstronomyMass spectrometryPenning trapISOLTRAPlaw.inventionNuclear physicslawMass spectrumPhysics::Atomic PhysicsDetectors and Experimental TechniquesNuclear ExperimentHybrid mass spectrometerPhysical Review Letters
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