000347258 001__ 347258
000347258 005__ 20231206102621.0
000347258 0247_ $$2doi$$a10.11588/HEIDOK.00033938
000347258 0247_ $$2URN$$a urn:nbn:de:bsz:16-heidok-339389
000347258 0247_ $$2URN$$aurn:nbn:de:bsz:16-heidok-339389
000347258 037__ $$aGSI-2023-00967
000347258 041__ $$aEnglish
000347258 1001_ $$0P:(DE-HGF)0$$aSasidharan, Sangeetha$$b0$$eCorresponding author$$gfemale
000347258 245__ $$aHigh-precision atomic mass measurement of helium-4
000347258 260__ $$aHeidelberg$$bHeidelberg University Library$$c2023
000347258 300__ $$a154
000347258 3367_ $$2DataCite$$aOutput Types/Dissertation
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000347258 3367_ $$2BibTeX$$aPHDTHESIS
000347258 3367_ $$02$$2EndNote$$aThesis
000347258 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1701853009_2960485
000347258 3367_ $$2DRIVER$$adoctoralThesis
000347258 502__ $$aDissertation, Ruprecht-Karls-Universität Heidelberg, 2023$$bDissertation$$cRuprecht-Karls-Universität Heidelberg$$d2023$$o2023-10-18
000347258 520__ $$aPenning-trap mass spectrometry enables a precise determination of atomic masses, supporting sensitive tests of fundamental physics. LIONTRAP (Light Ion TRAP) is a specialized mass spectrometer focused on precise mass measurements of light ions. In this experiment, we currently reach a relative resolution of 10 parts-per-trillion (ppt) and beyond for atomic masses. The measurement principle involves comparing the cyclotron frequencies of the ions under investigation and a carbon ion, which are inversely proportional to their masses. In the scope of this thesis, a high-precision mass measurement of 4He2+ was performed. To this end, a source for gaseous species was developed, and an extensive investigation of the systematics affecting the mass measurements, including image charge shift, lineshape systematics, and others, was conducted. The mass determined herein has a relative precision of 12 ppt. Based on this, the atomic mass of the neutral atom is determined from the binding energies and the electron mass without loss of precision. The mass value exhibits a precision that is 1.3 times greater than the current literature value but deviates from it by 6.6 combined standard deviations. This result contributes to fundamental physics by potentially supporting the improvement of the electron mass via a g-factor determination of 4He+. Towards the end of the thesis, new developments are presented, including a test of the two-ion balance technique to improve the precision of the upcoming mass measurement.
000347258 536__ $$0G:(DE-HGF)POF4-631$$a631 - Matter – Dynamics, Mechanisms and Control (POF4-631)$$cPOF4-631$$fPOF IV$$x0
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000347258 650_7 $$2Other$$a530 Physics
000347258 693__ $$0EXP:(DE-Ds200)no_experiment-20200803$$1EXP:(DE-Ds200)theory-20200803$$5EXP:(DE-Ds200)no_experiment-20200803$$atheory$$eno experiment theory work (theory)$$x0
000347258 773__ $$a10.11588/HEIDOK.00033938
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000347258 9101_ $$0I:(DE-Ds200)20121206GSI$$6P:(DE-HGF)0$$aGSI Helmholtzzentrum für Schwerionenforschung GmbH$$b0$$kGSI
000347258 9131_ $$0G:(DE-HGF)POF4-631$$1G:(DE-HGF)POF4-630$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vMatter – Dynamics, Mechanisms and Control$$x0
000347258 9141_ $$y2023
000347258 920__ $$lyes
000347258 9201_ $$0I:(DE-Ds200)ATP-20051214OR020$$kATP$$lAtom-, Quanten- & Fundamentalphysik$$x0
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