eprintid: 37515
rev_number: 12
eprint_status: archive
userid: 5014
dir: disk0/00/03/75/15
datestamp: 2025-11-06 10:56:38
lastmod: 2025-11-06 10:56:56
status_changed: 2025-11-06 10:56:38
type: doctoralThesis
metadata_visibility: show
creators_name: Unger, Daniel
title: High-Resolution X-ray Spectroscopy of Light Muonic Atoms
subjects: ddc-530
divisions: i-130700
adv_faculty: af-13
keywords: X-ray spectroscopy, Muonic atoms, QUARTET, Metallic magnetic calorimeter, Nuclear charge radius, Low-temperature detector, Exotic atoms
abstract: The low-lying energy levels of muonic atoms are highly sensitive to nuclear structure due to the strong overlap of the muon wavefunction with the nucleus. The energy of the muonic 2p-1s transition allows the determination of the nuclear charge radius, an essential quantity for establishing reliable nuclear models. The QUARTET collaboration aims to achieve an improvement by more than an order of magnitude in the precision of nuclear charge radii for light atoms from Li to Ne. This thesis focuses on the detector development within QUARTET for high-resolution X-ray spectroscopy of muonic atoms. A dedicated MMC-based detector array was designed, fabricated, and characterized. A cryostat sidearm was designed and assembled, a precise ADC calibration was established, and a data analysis library was developed. Two successful muon-beam measurements using Li, Be, and B as target materials were conducted. The results demonstrate the feasibility of QUARTET for significantly improving the accuracy of nuclear charge radii for light nuclei.
date: 2025
id_scheme: DOI
id_number: 10.11588/heidok.00037515
own_urn: urn:nbn:de:bsz:16-heidok-375150
date_accepted: 2025-10-29
advisor: HASH(0x55b513135038)
language: eng
bibsort: UNGERDANIEHIGHRESOLU20251029
full_text_status: public
place_of_pub: Heidelberg
citation:   Unger, Daniel  (2025) High-Resolution X-ray Spectroscopy of Light Muonic Atoms.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/37515/1/unger_dissertation.pdf