0000000000223667

AUTHOR

J. E. Bastin

showing 5 related works from this author

In-beam spectroscopy of $^{253,254}$No

2002

In-beam conversion electron spectroscopy experiments have been performed on the transfermium nuclei 253,254No using the conversion electron spectrometer SACRED in nearly collinear geometry in conjunction with the gas-filled separator RITU at the University of Jyvaskyla. The experimental setup is discussed and the spectra are compared to Monte Carlo simulations. The implications for the ground-state configuration of 253No are discussed.

PhysicsElectron spectrometer010308 nuclear & particles physics[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex]Monte Carlo methodSeparator (oil production)[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]7. Clean energy01 natural sciencesElectron spectroscopySpectral line0103 physical sciencesAtomic physicsNuclear ExperimentSpectroscopy010303 astronomy & astrophysicsBeam (structure)
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Structure of rotational bands in 253No

2009

In-beam gamma-ray and conversion electron spectroscopic studies have been performed on the 253 No nucleus. A strongly coupled rotational band has been identified and the improved statistics allows an assignment of the band structure as built on the $\ensuremath 9/2^-[734]_{\nu}$ ground state. The results agree with previously known transition energies but disagree with the tentative structural assignments made in earlier work.

PhysicsStrongly coupledNuclear and High Energy Physics[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]010308 nuclear & particles physicsHadronStructure (category theory)Electron01 natural sciences0103 physical sciencesStrong couplingNuclear fusion21.10.-k Properties of nuclei; nuclear energy levels - 23.20.Lv γ transitions and level energies - 29.30.Dn Electron spectroscopy - 27.90.+b A ≤ 220Atomic physics010306 general physicsGround stateElectronic band structure
Eur. Phys. J. A 42, 333 (2009)

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In-beam electron spectrometer used in conjunction with a gas-filled recoil separator

2004

The conversion-electron spectrometer SACRED has been redesigned for use in conjunction with the RITU gas-filled recoil separator. The system allows in-beam recoil-decay-tagging (RDT) measurements of internal conversion electrons. The performance of the system using standard sources and in-beam is described.

PhysicsNuclear physicsNuclear and High Energy PhysicsInternal conversionSpectrometerPhysics::Instrumentation and DetectorsConjunction (astronomy)Physics::Accelerator PhysicsElectronNuclear ExperimentBeam electronInstrumentationRecoil separatorNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Recoil-isomer tagging techniques at RITU

2003

Techniques have been developed to study isomeric states in nuclei with the use of RITU (gas filled separator) at the University of Jyvaskyla. The first was the recoil-isomer tagging technique initially, utilised by D.M. Cullen to study the K π = 8− isomeric state in 138Gd [1]. The juro-sphere array was employed in conjunction with ritu and a focal plane array which consisted of several Compton-suppressed Germanium detectors, placed in close geometry around a multi wire proportional counter (mwpc) and a silicon strip detector used for the implantation of recoiling nuclei. This technique correlates prompt and delayed γ-ray transitions across isomeric states and identifies the lifetime of the …

PhysicsSpectrometer010308 nuclear & particles physicsProportional counter7. Clean energy01 natural sciencesParticle detectorParticle identificationCharged particleSemiconductor detectorNuclear physicsRecoil0103 physical sciencesNeutron010306 general physics
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High K bands in mid-supershell nuclei

2003

The spectrum of prompt conversion electrons emitted by excited 254No nuclei has been measured, revealing discrete lines arising from transitions within the ground state band. A striking feature is a broad distribution that peaks near 100 keV and comprises high multiplicity electron cascades, probably originating from M1 transitions within rotational bands built on high K states. Evidence for the existence of isomeric states in 254No is presented. peerReviewed

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