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http://doi.org/10.25358/openscience-5111Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Block, Michael | - |
| dc.contributor.advisor | Blaum, Klaus | - |
| dc.contributor.author | Kaleja, Oliver T. | - |
| dc.date.accessioned | 2020-09-08T12:09:29Z | - |
| dc.date.available | 2020-09-08T12:09:29Z | - |
| dc.date.issued | 2020 | - |
| dc.identifier.uri | https://openscience.ub.uni-mainz.de/handle/20.500.12030/5115 | - |
| dc.description.abstract | In this work, the first successful application of the recently developed Phase-Imaging Ion-Cyclotron Resonance (PI-ICR) technique in the region of the heaviest elements is presented. For the first time, the atomic masses of several nobelium (No, Z=102), lawrencium (Lr, Z=103) and rutherfordium (Rf, Z=104) isotopes and isomers have been measured directly, reaching uncertainties on the order of few keV/c2 using the Penning-trap mass spectrometer SHIPTRAP. These heavy radionuclides were produced in fusion-evaporation reactions and separated from the primary beam by the velocity filter SHIP located at the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany. The mass measurements were carried out at production rates of few ions per second down to few ions per minute. To improve the overall efficiency on stopped and thermalized ions, the recently developed cryogenic gas-stopping cell was implemented into the existing beam line. Its performance with respect to purity and efficiency has been characterized and improved. The overall efficiency of SHIPTRAP is increased by about one order of magnitude with respect to previous measurements on heavy ions. | en_GB |
| dc.description.abstract | Diese Arbeit präsentiert die erste erfolgreiche Anwendung der phasenabbildenden Ionen-Zyklotron-Resonanz Methode (engl. Phase-Imaging Ion-Cyclotron-Resonance, kurz PI-ICR) in der Region der schwersten Elemente. Mit Hilfe des Penningfallen-Massenspektrometers SHIPTRAP wurden erstmalig die atomaren Massen mehrerer Nobelium- (No, Z=102), Lawrencium- (Lr, Z=103) und Rutherfordium- (Rf, Z=104) Isotope und Nobelium- und Lawrencium-Isomere direkt bestimmt und experimentelle Messunsicherheiten von wenigen keV/c2 erzielt. Dazu wurden die Radionuklide in Fusions-Evaporations-Reaktionen erzeugt und mittels des Geschwindigkeitsfilters SHIP an dem GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Deutschland, vom Primärstrahl getrennt. Die Massenmessungen wurden mit Produktionsraten von wenigen Ionen pro Sekunde bis hin zu wenigen Ionen pro Minute durchgeführt. Um die Gesamteffizienz des Abbremsens der Ionen zu steigern, wurde die kürzlich entwickelte kryogene Gaszelle in das bestehende System integriert. Ihre Effizienz und Reinheit wurde charakterisiert und optimiert, sodass die Gesamteffizienz des Systems, verglichen zu vorherigen Massenmessungen von SHIPTRAP an schweren Ionen, um etwa eine Größenordnung gesteigert werden konnte. | de_DE |
| dc.language.iso | eng | de |
| dc.rights | InCopyright | * |
| dc.rights.uri | https://rightsstatements.org/vocab/InC/1.0/ | * |
| dc.subject.ddc | 500 Naturwissenschaften | de_DE |
| dc.subject.ddc | 500 Natural sciences and mathematics | en_GB |
| dc.subject.ddc | 530 Physik | de_DE |
| dc.subject.ddc | 530 Physics | en_GB |
| dc.title | High-precision mass spectrometry of nobelium, lawrencium and rutherfordium isotopes and studies of long-lived isomers with SHIPTRAP | en_GB |
| dc.type | Dissertation | de |
| dc.identifier.urn | urn:nbn:de:hebis:77-openscience-e659421d-a8cd-4071-8862-4c40d7c996679 | - |
| dc.identifier.doi | http://doi.org/10.25358/openscience-5111 | - |
| jgu.type.dinitype | doctoralThesis | en_GB |
| jgu.type.version | Original work | de |
| jgu.type.resource | Text | de |
| jgu.date.accepted | 2020-08-17 | - |
| jgu.description.extent | xii, 148 Seiten | de |
| jgu.organisation.department | FB 09 Chemie, Pharmazie u. Geowissensch. | de |
| jgu.organisation.number | 7950 | - |
| jgu.organisation.name | Johannes Gutenberg-Universität Mainz | - |
| jgu.rights.accessrights | openAccess | - |
| jgu.organisation.place | Mainz | - |
| jgu.subject.ddccode | 500 | de |
| jgu.subject.ddccode | 530 | de |
| jgu.organisation.ror | https://ror.org/023b0x485 | |
| Appears in collections: | JGU-Publikationen | |
Files in This Item:
| File | Description | Size | Format | ||
|---|---|---|---|---|---|
 | kaleja_oliver_thomas-high-precision-20200907180812325.pdf | 19.81 MB | Adobe PDF | View/Open |