{"id":{"repo_id":"heid-diss","oai_identifier":"oai:archiv.ub.uni-heidelberg.de:5194"},"canonical_url":"https://search.dev.ndltd.org/etd/heid-diss/oai:archiv.ub.uni-heidelberg.de:5194","repository":{"repo_id":"heid-diss","name":"Universität Heidelberg","base_url":"http://archiv.ub.uni-heidelberg.de/volltextserver/cgi/oai2"},"display":{"title":"The mass of 22^Mg and a concept for a novel laser ion source trap","abstract":"Clean and high-quality radioactive ion beams can be prepared by combining ion trap and resonance laser ionization techniques. A feasibility study for such a laser ion source trap has been carried out which shows enormous improvement in the beam emittance, purity, and in addition allows for a variation of the ion beam time structure. Direct high-precision mass measurements around mass number A=22 are of utmost importance. First, the masses of the superallowed beta-emitter 22^Mg and its daughter 22^Na are needed to test the conserved-vector-current(CVC) hypothesis and the Cabibbo-Kobayashi-Maskawa(CKM) matrix unitarity, both being predictions of the Standard Model. Second, to calculate the reaction rate of 21^Na(p,gamma)22^Mg the involved masses are required very accurately. This rate is needed in order to extract an upper limit on the amount of a characteristic gamma-radiation emitted from classical nova bursts which has been searched for but not yet detected. At the triple trap mass spectrometer ISOLTRAP at ISOLDE/CERN, the masses of 21^Na, 22^Na, and 22^Mg have been measured with relative uncertainties of better than 1.5*10^{-8}. This solved a conflict between two available mass values for 22^Mg. The mass measurements as well as their impact are discussed. In addition a vivid description of the present ISOLTRAP setup along with the standard experimental procedure is described. Special emphasis has been made on the development of a carbon cluster ion source for absolute mass measurements at ISOLTRAP.","abstract_html":"Clean and high-quality radioactive ion beams can be prepared by combining ion trap and resonance laser ionization techniques. A feasibility study for such a laser ion source trap has been carried out which shows enormous improvement in the beam emittance, purity, and in addition allows for a variation of the ion beam time structure. Direct high-precision mass measurements around mass number A=22 are of utmost importance. First, the masses of the superallowed beta-emitter 22^Mg and its daughter 22^Na are needed to test the conserved-vector-current(CVC) hypothesis and the Cabibbo-Kobayashi-Maskawa(CKM) matrix unitarity, both being predictions of the Standard Model. Second, to calculate the reaction rate of 21^Na(p,gamma)22^Mg the involved masses are required very accurately. This rate is needed in order to extract an upper limit on the amount of a characteristic gamma-radiation emitted from classical nova bursts which has been searched for but not yet detected. At the triple trap mass spectrometer ISOLTRAP at ISOLDE/CERN, the masses of 21^Na, 22^Na, and 22^Mg have been measured with relative uncertainties of better than 1.5*10^{-8}. This solved a conflict between two available mass values for 22^Mg. The mass measurements as well as their impact are discussed. In addition a vivid description of the present ISOLTRAP setup along with the standard experimental procedure is described. Special emphasis has been made on the development of a carbon cluster ion source for absolute mass measurements at ISOLTRAP.","abstract_has_math":false,"creators":["Mukherjee, Manas"],"institution":"Universität Heidelberg","degree_name":null,"degree_level":"thesis.doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":["Kluge, H-Jürgen"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2004,"date_issued":"2004-12-15","date_published":"2004-12-15","updated_at":"2026-07-24T02:29:58Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://www.ub.uni-heidelberg.de/archiv/5194","outbound_label":"Repository record","outbound_source":"source_url"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Kluge, H-Jürgen"]},{"key":"dc:creator","label":"Author","values":["Mukherjee, Manas"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["Universitätsbibliothek Heidelberg"]},{"key":"dc:type","label":"Dc Type","values":["doctoralThesis"]},{"key":"thesis:degree_level","label":"Degree Level","values":["thesis.doctoral"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Universität Heidelberg"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Clean and high-quality radioactive ion beams can be prepared by combining ion trap and resonance laser ionization techniques. A feasibility study for such a laser ion source trap has been carried out which shows enormous improvement in the beam emittance, purity, and in addition allows for a variation of the ion beam time structure. Direct high-precision mass measurements around mass number A=22 are of utmost importance. First, the masses of the superallowed beta-emitter 22^Mg and its daughter 22^Na are needed to test the conserved-vector-current(CVC) hypothesis and the Cabibbo-Kobayashi-Maskawa(CKM) matrix unitarity, both being predictions of the Standard Model. Second, to calculate the reaction rate of 21^Na(p,gamma)22^Mg the involved masses are required very accurately. This rate is needed in order to extract an upper limit on the amount of a characteristic gamma-radiation emitted from classical nova bursts which has been searched for but not yet detected. At the triple trap mass spectrometer ISOLTRAP at ISOLDE/CERN, the masses of 21^Na, 22^Na, and 22^Mg have been measured with relative uncertainties of better than 1.5*10^{-8}. This solved a conflict between two available mass values for 22^Mg. The mass measurements as well as their impact are discussed. In addition a vivid description of the present ISOLTRAP setup along with the standard experimental procedure is described. Special emphasis has been made on the development of a carbon cluster ion source for absolute mass measurements at ISOLTRAP.","Reine radioaktive Ionenstrahlen mit hoher Strahlqualität können präpariert werden, indem man Ionenfallen mit der Laser-Resonanzionisationstechnik kombiniert. Eine Machbarkeitsstudie für eine solche Laser-Ionenfallenquelle, die eine deutliche Verbesserung der Emittanz und darüber hinaus eine variable Zeitstruktur des Ionenstrahls ermöglicht, wurde durchgeführt. Direkte, hochpräsise Massenmessungen um die Massenzahl A=22 sind von besonderem Interesse: Erstens wird die Masse des übererlaubten beta-Emitters 22^Mg und seiner Tochter 22^Na zum Test der Vektorstromerhaltungs(CVC)-Hypothese und der Unitarität der Quarkmischungsmatrix(CKM) - beides Vorhersagen des Standardmodells - benötigt. Zweitens sind die Massenwerte wichtige Parameter, um die Reaktionsrate 21^Na(p,gamma)22^Mg zu berechnen. Diese Rate wird benötigt, um eine obere Grenze für die charakteristische gamma-Strahlung, die in klassischen Nova-Bursts emittiert wird, zu extrahieren. Diese Strahlung wurde zwar gesucht, aber bisher noch nicht beobachtet. Mit dem Dreifallen-Massenspektrometer ISOLTRAP wurden die Massen von 21^Na, 22^Na, und 22^Mg mit einer relativen Massengenauigkeit von besser als 1,5*10^{-8} gemessen. Dies löste einen Konflikt zweier vorhandener Massenwerte für 22^Mg. Die Massenmessungen und ihre Konsequenzen werden vorgestellt. Ein besonderes Augenmerk wurde auf die Entwicklung einer Kohlenstoff-Cluster-Laserionenquelle für absolute Massenmessungen bei ISOLTRAP gelegt."]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["The mass of 22^Mg and a concept for a novel laser ion source trap","Die Masse von 22^Mg und ein Konzept für eine neuartige Laser-Ionenquelle"]}]}],"canonical_facts":{"dc:contributor":["Kluge, H-Jürgen"],"dc:creator":["Mukherjee, Manas"],"dc:description.abstract":["Clean and high-quality radioactive ion beams can be prepared by combining ion trap and resonance laser ionization techniques. A feasibility study for such a laser ion source trap has been carried out which shows enormous improvement in the beam emittance, purity, and in addition allows for a variation of the ion beam time structure. Direct high-precision mass measurements around mass number A=22 are of utmost importance. First, the masses of the superallowed beta-emitter 22^Mg and its daughter 22^Na are needed to test the conserved-vector-current(CVC) hypothesis and the Cabibbo-Kobayashi-Maskawa(CKM) matrix unitarity, both being predictions of the Standard Model. Second, to calculate the reaction rate of 21^Na(p,gamma)22^Mg the involved masses are required very accurately. This rate is needed in order to extract an upper limit on the amount of a characteristic gamma-radiation emitted from classical nova bursts which has been searched for but not yet detected. At the triple trap mass spectrometer ISOLTRAP at ISOLDE/CERN, the masses of 21^Na, 22^Na, and 22^Mg have been measured with relative uncertainties of better than 1.5*10^{-8}. This solved a conflict between two available mass values for 22^Mg. The mass measurements as well as their impact are discussed. In addition a vivid description of the present ISOLTRAP setup along with the standard experimental procedure is described. Special emphasis has been made on the development of a carbon cluster ion source for absolute mass measurements at ISOLTRAP.","Reine radioaktive Ionenstrahlen mit hoher Strahlqualität können präpariert werden, indem man Ionenfallen mit der Laser-Resonanzionisationstechnik kombiniert. Eine Machbarkeitsstudie für eine solche Laser-Ionenfallenquelle, die eine deutliche Verbesserung der Emittanz und darüber hinaus eine variable Zeitstruktur des Ionenstrahls ermöglicht, wurde durchgeführt. Direkte, hochpräsise Massenmessungen um die Massenzahl A=22 sind von besonderem Interesse: Erstens wird die Masse des übererlaubten beta-Emitters 22^Mg und seiner Tochter 22^Na zum Test der Vektorstromerhaltungs(CVC)-Hypothese und der Unitarität der Quarkmischungsmatrix(CKM) - beides Vorhersagen des Standardmodells - benötigt. Zweitens sind die Massenwerte wichtige Parameter, um die Reaktionsrate 21^Na(p,gamma)22^Mg zu berechnen. Diese Rate wird benötigt, um eine obere Grenze für die charakteristische gamma-Strahlung, die in klassischen Nova-Bursts emittiert wird, zu extrahieren. Diese Strahlung wurde zwar gesucht, aber bisher noch nicht beobachtet. Mit dem Dreifallen-Massenspektrometer ISOLTRAP wurden die Massen von 21^Na, 22^Na, und 22^Mg mit einer relativen Massengenauigkeit von besser als 1,5*10^{-8} gemessen. Dies löste einen Konflikt zweier vorhandener Massenwerte für 22^Mg. Die Massenmessungen und ihre Konsequenzen werden vorgestellt. Ein besonderes Augenmerk wurde auf die Entwicklung einer Kohlenstoff-Cluster-Laserionenquelle für absolute Massenmessungen bei ISOLTRAP gelegt."],"dc:format.medium":["application/pdf"],"dc:publisher":["Universitätsbibliothek Heidelberg"],"dc:title":["The mass of 22^Mg and a concept for a novel laser ion source trap","Die Masse von 22^Mg und ein Konzept für eine neuartige Laser-Ionenquelle"],"dc:type":["doctoralThesis"],"thesis:degree_level":["thesis.doctoral"],"thesis:institution_name":["Universität Heidelberg"]},"updated_at":"2026-07-24T02:29:58Z"}