Search results for "Trap"

showing 10 items of 2144 documents

Study of radial motion phase advance during motion excitations in a Penning trap and accuracy of JYFLTRAP mass spectrometer

2021

Phase-imaging ion-cyclotron-resonance technique has been implemented at the Penning-trap mass spectrometer JYFLTRAP and is routinely employed for mass measurements of stable and short-lived nuclides produced at IGISOL facility. Systematic uncertainties that impose limitations on the accuracy of measurements are discussed. It was found out that the phase evolution of the radial motion of ions in a Penning trap during the application of radio-frequency fields leads to a systematic cyclotron frequency shift when more than one ion species is present in the trap during the cyclotron frequency measurement. An analytic expression was derived to correctly account for the shift. Cross-reference mass…

Nuclear and High Energy PhysicsmassaspektrometriaPhysics - Instrumentation and DetectorsCyclotrontutkimuslaitteetFOS: Physical sciencesnucl-exMass spectrometryResidual01 natural sciencesIonlaw.inventionTrap (computing)lawPhysics::Plasma Physics0103 physical sciencesNuclear fusionNuclear Physics - ExperimentNuclideDetectors and Experimental TechniquesNuclear Experiment (nucl-ex)010306 general physicsNuclear Experimentphysics.ins-detNuclear ExperimentPhysicssyklotronit010401 analytical chemistryInstrumentation and Detectors (physics.ins-det)Penning trap0104 chemical sciencesComputational physicsydinfysiikkaThe European Physical Journal A
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Conversion electron spectroscopy at IGISOL

2012

Conversion elecron spectroscopy has been an important part of the nuclear spectrocopy research at the Department of Physics of the University of Jyv¨askyl¨a since the commissioning of the first cyclotron in the mid 1970s. At the IGISOL facility a specialiced conversion electron spectrometer ELLI was developed in the late 1980s. The first results with ELLI were obtained using the beams from the old MC-20 cyclotron to study newly discovered isotopes of refractory fission products. In the present K130 cyclotron laboratory ELLI has been utilized in many decay-spectroscopy experiments both neutron-deficient and neutron-rich side of the valley of stability. In the early 2000s the new JYFLTRAP ion…

Nuclear and High Energy Physicson-line mass separatorElectron spectrometerChemistrytrap-assisted spectroscopyCyclotronCondensed Matter PhysicsPenning trapElectron spectroscopyAtomic and Molecular Physics and Opticslaw.inventionBeamlinelawValley of stabilityIon trapconversion electron spectroscopyPhysical and Theoretical ChemistryAtomic physicsSpectroscopy
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A compact linear Paul trap cooler buncher for CRIS

2020

A gas-filled linear Paul trap for the Collinear Resonance Ionisation Spectroscopy (CRIS) experiment at ISOLDE, CERN is currently under development. The trap is designed to accept beam from both ISOLDE target stations and the CRIS stable ion source. The motivation for the project along with the current design, simulations and future plans, will be outlined. peerReviewed

Nuclear and High Energy Physicsspektroskopiatutkimuslaitteet7. Clean energy01 natural sciencesTrap (computing)Nuclear physics0103 physical sciences3D-tulostusDalton Nuclear InstituteNuclear Experiment010306 general physicsInstrumentationPhysicsLarge Hadron Collider010401 analytical chemistryion trapping3D printingIon source0104 chemical sciencesResearchInstitutes_Networks_Beacons/dalton_nuclear_institutelaser spectroscopyPhysics::Accelerator PhysicsIon trapydinfysiikkaBeam (structure)Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Phase-Imaging Ion-Cyclotron-Resonance technique at the JYFLTRAP double Penning trap mass spectrometer

2018

The Phase-Imaging Ion-Cyclotron-Resonance (PI-ICR) technique has been commissioned at the JYFLTRAP double Penning trap mass spectrometer. This technique is based on projecting the ion motion in the Penning trap onto a position-sensitive multichannel-plate ion detector. Mass measurements of stable 85 Rb $ ^{+}$ and 87 Rb $ ^{+}$ ions with well-known mass values show that relative uncertainties $ \Delta m/m \leq 7\cdot 10^{-10}$ are possible to reach with the PI-ICR technique at JYFLTRAP. The significant improvement both in resolving power and in precision compared to the conventional Time-of-Flight Ion Cyclotron Resonance technique will enable measurements of close-lying isomeric states and …

Nuclear and High Energy PhysicstutkimuslaitteetHadronCyclotronspektrometritdouble penning trap mass spectrometerMass spectrometry01 natural sciencesIonlaw.inventionPhysics::Plasma Physicslaw0103 physical sciencesJYFLTRAPNuclear fusionNuclear Experiment010306 general physicsPhysics010308 nuclear & particles physicssyklotronitPenning trapphase-imagingion-cyclotron-resonance techniqueNeutrinoAtomic physicsydinfysiikkaIon cyclotron resonanceThe European Physical Journal A
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Improvements on Decay Heat Summation Calculations by Means of Total Absorption Gamma-ray Spectroscopy Measurements

2011

The decay heat of fission products plays an important role in predictions of the heat released by nuclear fuel in reactors. In this contribution we present results of the analysis of the measurement of the beta decay of some refractory isotopes that were considered possible important contributors to the decay heat in reactors. The measurements presented here were performed at the IGISOL facility of the University of Jyvaeskylae, Finland. In our measurements we have combined for the first time a Penning trap (JYFLTRAP), which was used as a high resolution isobaric separator, with a total absorption spectrometer. The results of the measurements as well as their consequences for decay heat sum…

Nuclear physicsFission productsMaterials scienceNuclear fuelIsotopeSpectrometerIsotopes of samariumGeneral Physics and AstronomyGamma spectroscopyDecay heatNuclear ExperimentPenning trapJournal of the Korean Physical Society
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Upgrade and yields of the IGISOL facility

2008

The front end of the Jyvaskyla IGISOL facility was upgraded in 2003 by increasing its pumping capacity and by improving the radiation shielding. In late 2005, the skimmer electrode of the mass separator was replaced by a sextupole ion guide, which improved the mass separator efficiency up to an order of magnitude. The current design of the facility is described. The updated yield data, achieved with and without the additional JYFLTRAP purification, using both fusion evaporation reactions and particle induced fission is presented to give an overview of the capability of the facility. These data have been determined either by radioactivity measurements or by direct ion counting after the Penn…

Nuclear physicsFront and back endsNuclear and High Energy PhysicsUpgradeRadiation shieldingChemistryFissionMass spectrometryPenning trapInstrumentationIonSeparator (electricity)Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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A method of magnetic storage of ultra-cold neutrons for a precise measurement of the neutron lifetime

1999

The beta-decay lifetime of the free neutron has been determined most precisely using storage of ultra-cold neutrons (UCNs) in material bottles. The quantity measured is the storage time which is substantially smaller than due to spurious losses of UCNs at collisions with the bottle walls. The systematic uncertainty of the correction - to the true lifetime is presently the main obstacle towards higher precision in this measurement. In the alternative magnetic trapping of UCNs, storage conditions can be realized where this correction becomes vanishingly small. This paper gives a method to measure the neutron lifetime with very low systematic errors, using confinement of UCNs in vacuum by magn…

Nuclear physicsGravitationSystematic errorPhysicsNuclear and High Energy PhysicsVolume (thermodynamics)lawMagnetic storageNeutronTrappingNuclear ExperimentSpurious relationshiplaw.inventionJournal of Physics G: Nuclear and Particle Physics
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Extrapolation of nuclear properties to the region near Z = 184

2008

Nuclear physicsMass formulaPhysicsElectric potential energyExtrapolationLiquid dropNuclear matter
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Towards Shorter-Lived Nuclides in ISOLTRAP Mass Measurements

2001

Recently, the applicability of Penning trap mass spectrometry has been extended to nuclides with a half-life of less than one second. The mass of 33Ar(T 1/2 = 174 ms) was measured using the ISOLTRAP spectrometer with an accuracy of 4.2 keV. This measurement provided a stringent test of the Isobaric Multiplet Mass Equation (IMME) at mass number A = 33 and isospin T = 3/2. The fast measurement cycle that shows the way to other measurements of very-short-lived nuclides is presented. Furthermore, the results of the IMME test are displayed.

Nuclear physicsMass numberChemistryNuclideIon trapAtomic physicsMass spectrometryPenning trapISOLTRAPAtomic massHybrid mass spectrometer
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Positron Annihilation in Corroded Steels St20 and St3S

2006

The paper deals with examining the lifetimes of positrons emitted from Na source in corroded St20 and St3S steels. Influence of the method of defecting the sample surfaces on the spectrum of positron lifetimes was investigated. Influence of temperature of initial annealing of samples, plastic deformation, electrolytic hydrogenation and corrosion in HCl vapors on trapping positrons in the examined steels was also determined.

Nuclear physicsMaterials sciencePositronAnnealing (metallurgy)Astrophysics::High Energy Astrophysical PhenomenaMetallurgyPhysics::Accelerator PhysicsGeneral Physics and AstronomyElectrolyteTrappingPhysics::Chemical PhysicsCorrosionPositron annihilationActa Physica Polonica A
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