<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "The First Direct Q_EC Measurement in 163Ho\r\nand the Development of the High-Precision\r\nMass Spectrometer PENTATRAP for Neutrino\r\nPhysics"^^ . "An improvement of the upper limit of the electron neutrino mass to a sub eV/c2 level is the goal of the ECHo collaboration. The upper limit of the\r\nneutrino mass will be determined with cryogenic microcalorimetry from the analysis of the atomic de-excitation spectrum of 163Dy after the EC in\r\n163Ho. To check for systematic errors an independent measurement of the Q-value of the EC in 163Ho is required. For the first phase of ECHo the issue\r\nwith the discrepancy between the latest microcalorimetry measurements of the Q-value and its literature value needed to be fixed. For this, a first direct\r\nmeasurement of the Q-value of the EC in 163Ho with the Penning-trap mass\r\nspectrometer SHIPTRAP was accomplished in the context of this thesis using\r\nthe novel PI-ICR technique. Within the uncertainty, it agrees with the\r\nlatest microcalorimetry measurements. Furthermore, the achieved precision\r\nis sufficient for ECHo-1k to be able to improve the upper limit of the electron\r\nneutrino mass to 10 eV/c2 (95% C.L.). For further improvements on the\r\nneutrino mass, the Q-value needs to be improved, too. For this, the novel\r\nhigh precision Penning-trap mass spectrometer PENTATRAP has been developed\r\nand commissioned. PENTATRAP will utilize five Penning traps to\r\ntest new measurement schemes, which could make it possible to reach unv\r\ncertainties in the 10^12 regime. Currently, first mass-ratio measurements of\r\nthe nuclei pair 132Xe and 131Xe with known masses were carried out to test\r\nthe performance of PENTATRAP."^^ . "2018" . . . . . . . "Alexander"^^ . "Rischka"^^ . "Alexander Rischka"^^ . . . . . . "The First Direct Q_EC Measurement in 163Ho\r\nand the Development of the High-Precision\r\nMass Spectrometer PENTATRAP for Neutrino\r\nPhysics (PDF)"^^ . . . "Thesis_Alexander_Rischka.pdf"^^ . . . "The First Direct Q_EC Measurement in 163Ho\r\nand the Development of the High-Precision\r\nMass Spectrometer PENTATRAP for Neutrino\r\nPhysics (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "The First Direct Q_EC Measurement in 163Ho\r\nand the Development of the High-Precision\r\nMass Spectrometer PENTATRAP for Neutrino\r\nPhysics (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "The First Direct Q_EC Measurement in 163Ho\r\nand the Development of the High-Precision\r\nMass Spectrometer PENTATRAP for Neutrino\r\nPhysics (Other)"^^ . . . . . . "preview.jpg"^^ . . . "The First Direct Q_EC Measurement in 163Ho\r\nand the Development of the High-Precision\r\nMass Spectrometer PENTATRAP for Neutrino\r\nPhysics (Other)"^^ . . . . . . "medium.jpg"^^ . . . "The First Direct Q_EC Measurement in 163Ho\r\nand the Development of the High-Precision\r\nMass Spectrometer PENTATRAP for Neutrino\r\nPhysics (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #25153 \n\nThe First Direct Q_EC Measurement in 163Ho \nand the Development of the High-Precision \nMass Spectrometer PENTATRAP for Neutrino \nPhysics\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .