<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "High-Precision Measurements of Single Molecular\r\nHydrogen Ions at ALPHATRAP"^^ . "The work of this thesis demonstrates single-ion nondestructive spectroscopy of molecules in\r\nPenning traps. Due to their rovibrational level structure and the close proximity of at least two nuclei, molecular ions exhibit unique sensitivities for tests of the Standard Model of particle physics. In\r\nparticular, a high-precision comparison of rovibrational transition energies of H2+ and its antimatter counterpart anti-H2+ promises to stringently test for violations of the fundamental charge-parity-time\r\nreversal symmetry [1, 2]. Here, a new method for nondestructive readout of the internal quantum\r\nstate of a single molecular hydrogen ion (MHI) was demonstrated, along with external production and several month-long confinement in a Penning trap, which are among the requirements for future measurements of anti-H2+. The internal quantum state - vibrational, rotational, hyperfine,\r\nZeeman - of the MHI was determined via millimeter wave-induced resonant electron spin flips (eSF) employing the continuous Stern-Gerlach effect [3]. This was applied for spectroscopy of all six eSF transitions in the rovibrational ground state of HD+, resulting in the determination of the\r\nbound-electron ge(0, 0) factor to 0.20 ppb and the spin-spin interaction coefficients of the hyperfine\r\nstructure (HFS), E4(0, 0) and E5(0, 0), to 44 ppb and 151 ppb, respectively. The experimental precision of ge(0, 0) exceeds the precision of the current theoretical prediction by almost three orders of magnitude [4]. Our value also shows agreement with a new, still unpublished calculation,\r\nwhich surpasses the experimental precision. Precise values of ge factors allow the unambiguous internal quantum state detection of MHI. E4(0, 0) and E5(0, 0) probe HFS theory below the ppm level, which enters the prediction of rovibrational transition frequencies. The near-agreement of the values does not explain deviations observed in rovibrational measurements [5]. Furthermore, efforts\r\ntowards applying the developed methods to high-precision rovibrational spectroscopy in Penning\r\ntraps are presented."^^ . "2025" . . . . . . . "Charlotte Maria"^^ . "König"^^ . "Charlotte Maria König"^^ . . . . . . "High-Precision Measurements of Single Molecular\r\nHydrogen Ions at ALPHATRAP (PDF)"^^ . . . "phdthesis_charlotte_opt_final.pdf"^^ . . . "High-Precision Measurements of Single Molecular\r\nHydrogen Ions at ALPHATRAP (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "High-Precision Measurements of Single Molecular\r\nHydrogen Ions at ALPHATRAP (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "High-Precision Measurements of Single Molecular\r\nHydrogen Ions at ALPHATRAP (Other)"^^ . . . . . . "preview.jpg"^^ . . . "High-Precision Measurements of Single Molecular\r\nHydrogen Ions at ALPHATRAP (Other)"^^ . . . . . . "medium.jpg"^^ . . . "High-Precision Measurements of Single Molecular\r\nHydrogen Ions at ALPHATRAP (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #36629 \n\nHigh-Precision Measurements of Single Molecular \nHydrogen Ions at ALPHATRAP\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .