eprintid: 14006
rev_number: 18
eprint_status: archive
userid: 157
dir: disk0/00/01/40/06
datestamp: 2012-11-22 09:35:40
lastmod: 2012-12-10 11:41:36
status_changed: 2012-11-22 09:35:40
type: doctoralThesis
metadata_visibility: show
creators_name: Roux, Christian-Eric
title: High-resolution mass spectrometry: The trap design and detection system of Pentatrap and new Q-values for neutrino studies
subjects: ddc-530
divisions: i-130001
adv_faculty: af-13
abstract: The novel Penning-trap mass spectrometer Pentatrap aims for mass-ratio measure- ments of highly-charged ions with a relative precision of a few parts in 10^12. As the key part, an innovative trap assembly was designed. It consists of five cylindrical traps allowing for simultaneous measurements of two ion species and for continuous moni- toring of the trapping conditions. This promises a substantial reduction of systematic errors. Moreover, in the course of this thesis a detection system was developed and characterized, which will enable fast and accurate measurements through its single-ion sensitivity and high signal-to-noise ratio.
In neutrino physics, the detection of neutrinoless double-electron capture would un- ambiguously prove the Majorana nature of neutrinos. In search for a suitable nuclide for the observation of this process, precise information about the total decay energy (Q-value) is needed in order to find a transition with a resonant enhancement of the decay rate. The mass ratios of 152Sm/152Gd and 164Dy/164Er were measured to a relative uncertainty of ∼ 10^−9 at Shiptrap. This presents the first directly determined Q-values for the corresponding transitions.
date: 2012-04-30
id_scheme: DOI
id_number: 10.11588/heidok.00014006
ppn_swb: 1651926506
own_urn: urn:nbn:de:bsz:16-heidok-140069
date_accepted: 2012-11-05
advisor: HASH(0x55d997b90fb0)
language: eng
bibsort: ROUXCHRISTHIGHRESOLU20120430
full_text_status: public
citation:   Roux, Christian-Eric  (2012) High-resolution mass spectrometry: The trap design and detection system of Pentatrap and new Q-values for neutrino studies.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/14006/1/PhD_ChristianRoux_2012.pdf