title: Mass measurements on highly charged lead and uranium ions  with the Penning-trap mass spectrometer Pentatrap
creator: Kromer, Kathrin
subject: ddc-530
subject: 530 Physics
description: With the Penning-trap mass spectrometer Pentatrap it is possible to carry out mass ratio determinations with a relative uncertainty of a few times 10^(−12). This is achieved by using a stack of five cylindrical Penning traps in a strong, homogeneous 7T magnetic field, stabilized  against environmental influences, which allows phase-sensitive detection methods on single highly charged ions. The core of this thesis are three peer-reviewed publications that present measurements with the mass spectrometer Pentatrap. The first and second publication present the determination of the atomic mass of lead-208 and uranium-238 to an unparalleled precision in the heavy mass sector of 7 and 6*10^(−11), respectively. These results directly  contribute to the mass “backbone”, a number of nuclides whose mass is known to high precision, allowing one to improve relative mass measurements in the range of heavy and  superheavy nuclides as well as to determine the g-factor of the bound electron in heavy, hydrogenlike ions. In the third article, a metastable state with an excitation energy of around 31 eV was measured in 208Pb41+ as a mass difference on top of the absolute mass of the lead ion of ≈194 GeV/c^2 and compared to two ab initio multiconfiguration Dirac-Hartree-Fock atomic-structure calculations.
date: 2024
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/34939/1/PhD_Thesis_Kromer.pdf
identifier: DOI:10.11588/heidok.00034939
identifier: urn:nbn:de:bsz:16-heidok-349392
identifier:   Kromer, Kathrin  (2024) Mass measurements on highly charged lead and uranium ions with the Penning-trap mass spectrometer Pentatrap.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/34939/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng