0000000000501367

AUTHOR

Harri Toivonen

showing 4 related works from this author

Production of pure samples of 131mXe and 135Xe

2011

Pure samples of (131m)Xe, (133m)Xe, (133)Xe and (135)Xe facilitate the calibration and testing of noble gas sampler stations and related laboratory instrumentation. We have earlier reported a Penning trap-based production method for pure (133m)Xe and (133)Xe samples. Here we complete the work by reporting the successful production of pure (131m)Xe and (135)Xe samples using the same technique. In addition, we present data on xenon release from graphite.

RadiationXenonchemistryta114Analytical chemistryNoble gaschemistry.chemical_elementGraphitePenning trapApplied radiation and isotopes
researchProduct

The decay of 133mXe.

2007

The decay of (133m)Xe has been re-measured using an electron-transporter spectrometer and a planar HPGe detector. The sample of (133m)Xe was produced by means of proton-induced fission using an ion-guide based on-line mass separator. The deduced K and L+M+... shell conversion coefficients, alpha(Kappa)=6.5(9) and alpha(L+M+...)=2.9(4), agree within the uncertainty limits with the theoretical values and remove the inconsistencies between the previous experimental studies of (133m)Xe.

RadiationSpectrometer010308 nuclear & particles physicsChemistryFissionAnalytical chemistrychemistry.chemical_element01 natural sciencesXenon0103 physical sciencesConversion coefficientsAtomic physicsNuclear Experiment010306 general physicsHpge detectorApplied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
researchProduct

Comparison of gamma-ray coincidence and low-background gamma-ray singles spectrometry

2011

Aerosol samples have been studied under different background conditions using gamma-ray coincidence and low-background gamma-ray singles spectrometric techniques with High-Purity Germanium detectors. Conventional low-background gamma-ray singles counting is a competitive technique when compared to the gamma-gamma coincidence approach in elevated background conditions. However, measurement of gamma-gamma coincidences can clearly make the identification of different nuclides more reliable and efficient than using singles spectrometry alone. The optimum solution would be a low-background counting station capable of both singles and gamma-gamma coincidence spectrometry.

Astrophysics::High Energy Astrophysical Phenomena[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]010403 inorganic & nuclear chemistryMass spectrometry01 natural sciencesComprehensive Nuclear-Test-Ban TreatyCoincidence030218 nuclear medicine & medical imagingNuclear physics03 medical and health sciences0302 clinical medicineBackground RadiationAir Pollution RadioactiveNuclideGamma ray spectrometryBackground radiationNuclear PhysicsPhysicsAerosolsRadiation surveillanceRadiationta114GermaniumGamma rayGamma-ray spectrometry0104 chemical sciencesSpectrometry GammaGamma Rays22Na
researchProduct

Ultra-high resolution mass separator—Application to detection of nuclear weapons tests

2009

Abstract A Penning trap-based purification process having a resolution of about 1 ppm is reported. In this context, we present for the first time a production method for the most complicated and crucially important nuclear weapons test signature, 133mXe. These pure xenon samples are required by the Comprehensive Nuclear-Test-Ban Treaty Organization to standardize and calibrate the worldwide network of xenon detectors.

Nuclear physicsRadiationXenonChemistryNuclear engineeringDetectorComprehensive Nuclear-Test-Ban Treatychemistry.chemical_elementSeparator (oil production)Nuclear weaponPenning trapUltra high resolutionApplied Radiation and Isotopes
researchProduct