A5074092796- Atomic and Molecular Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear physics research studies
- Advanced Frequency and Time Standards
- Mass Spectrometry Techniques and Applications
- Advanced Chemical Physics Studies
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Laser-induced spectroscopy and plasma
- Ocular and Laser Science Research
- Quantum Chromodynamics and Particle Interactions
- Astronomical and nuclear sciences
- Quantum Information and Cryptography
- Cancer-related Molecular Pathways
- Solid State Laser Technologies
- Renal and related cancers
- Semantic Web and Ontologies
- Nuclear Physics and Applications
- Dark Matter and Cosmic Phenomena
- Epigenetics and DNA Methylation
- Quantum, superfluid, helium dynamics
- Quantum optics and atomic interactions
- Optical properties and cooling technologies in crystalline materials
- Particle accelerators and beam dynamics
- Fusion materials and technologies
Max Planck Institute for Nuclear Physics
2018-2025
Heidelberg University
2019-2020
Leibniz-Institute for Food Systems Biology at the Technical University of Munich
2011
Technische Universität Berlin
2011
Albstadt-Sigmaringen University
2008
Abstract Quantum electrodynamics (QED) is one of the most fundamental theories physics and has been shown to be in excellent agreement with experimental results 1–5 . In particular, measurements electron’s magnetic moment (or g factor) highly charged ions Penning traps provide a stringent probe for QED, which allows testing standard model strongest electromagnetic fields 6 When studying differences between isotopes, many common QED contributions cancel owing identical electron configuration,...
Inner-shell electrons naturally sense the electric field close to nucleus, which can reach extreme values beyond 1015 V cm-1 for innermost electrons1. Especially in few-electron, highly charged ions, interaction with electromagnetic fields be accurately calculated within quantum electrodynamics (QED), rendering these ions good candidates test validity of QED strong fields. Consequently, their Lamb shifts were intensively studied past several decades2,3. Another approach is measurement...
We present the measurements of individual bound electron $g$ factors ${^{20}\mathrm{Ne}}^{9+}$ and ${^{22}\mathrm{Ne}}^{9+}$ on relative level 0.1 parts per billion. The comparison with theory represents most stringent test bound-state QED in strong electric fields. A dedicated mass measurement results $m(^{20}\mathrm{Ne})=\phantom{\rule{0ex}{0ex}}19.992\text{ }440\text{ }168\text{ }77(9)\text{ }\text{ }\mathrm{u}$, which improves current literature value by a factor 18, disagrees 4 standard...
In this work, we demonstrate a new method for quantum state control and nondestructive internal readout of single HD^{+} ion in the rovibrational ground Penning trap. Furthermore, measurement magnetic trapping field with same to sub-ppb uncertainty. This could enable nondestructive, high-precision spectroscopy hyperfine, Zeeman, level structure molecular ions. particular, technique can be applied H_{2}^{+} as well its antimatter equivalent, H[over ¯]_{2}^{-}, potential tests...
Abstract The determination of the effective electron neutrino mass via kinematic analysis beta and capture spectra is considered to be model-independent since it relies on energy momentum conservation. At same time precise description expected spectrum goes beyond simple phase space term. In particular for processes, many-body electron-electron interactions lead additional structures besides main resonances in calorimetrically measured spectra. A $$^{163}$$ <mml:math...
First ever measurements of the ratios free cyclotron frequencies heavy highly charged ions with Z>50 relative uncertainties close to 1e-11 are presented. Such accurate have become realistic due construction novel cryogenic multi-Penning-trap mass spectrometer PENTATRAP. Based on measured frequency ratios, differences five pairs stable xenon isotopes, ranging from 126Xe 134Xe, been determined. Moreover, first direct measurement an electron binding energy in a ion, namely 37th atomic xenon,...
In the experiment, <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>g</a:mi></a:math> factor of boronlike <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:mmultiscripts><c:mrow><c:msup><c:mrow><c:mi>Sn</c:mi></c:mrow><c:mrow><c:mn>45</c:mn><c:mo>+</c:mo></c:mrow></c:msup></c:mrow><c:mprescripts/><c:none/><c:mrow><c:mn>118</c:mn></c:mrow></c:mmultiscripts></c:mrow></c:math> has been measured with a 0.5 ppb uncertainty. This is first...
Magnetic moments of bound-electron systems are a sensitive tool for testing fundamental interactions. The g factors lithium-like ions have been rigorously studied in recent years, enabling insights into the relativistic interelectronic effects. In this work, we present -factor measurement tin, accurate to 0.5 parts per billion, as well ab initio theoretical calculations that include an advanced treatment interaction. We further improved prediction by using experimental result hydrogen-like...
This paper reports on the development and testing of a novel, highly efficient technique for injection very rare species into electron beam ion traps (EBITs) production charged ions (HCI). It relies in-trap laser-induced desorption atoms from sample brought close to resulting in high capture efficiency EBIT. We have demonstrated steady HCI stable isotope 165Ho samples only 1012 (∼300 pg) charge states up 45+. these can be subsequently extracted use other experiments or stored trapping volume...
We discuss the coupling of motion two ion species in separate Penning traps via a common tank circuit. The enhancement assisted by circuit is demonstrated an avoided crossing behavior measurement motional modes coupled ions. propose intermittent laser cooling method for sympathetic and provide theoretical description. technique enables tuning strength between thus allows efficient arbitrary type single high-precision Penning-trap experiments.
The capture and confinement of a large pure sample anions into an ion trap is challenging due to the fragile nature these weakly bound atomic systems. We present results experimental study using ${\mathrm{Au}}^{\ensuremath{-}}$ in which from keV-energy continuous beam were loaded cylindrical Penning trap. Experimental parameters such as stopping potential axial depth found be crucial. transfer radial momentum ion--ion collisions was identified main contributing factor successful capture. A...
Inner-shell electrons naturally sense the electric field close to nucleus, which can reach extreme values beyond $10^{15}\,\text{V}/\text{cm}$ for innermost electrons. Especially in few-electron highly charged ions, interaction with electromagnetic fields be accurately calculated within quantum electrodynamics (QED), rendering these ions good candidates test validity of QED strong fields. Consequently, their Lamb shifts were intensively studied last decades. Another approach is measurement...
We present the measurements of individual bound electron $g$ factors $^{20}\text{Ne}^{9+}$ and $^{22}\text{Ne}^{9+}$ on relative level $0.1\,\text{parts}$ per billion. The comparison with theory represents most stringent test bound-state QED in strong electric fields. A dedicated mass measurement results $m\left(^{20}\text{Ne}\right)=19.992\,440\,168\,77\,(9)\,\text{u}$, which improves current literature value by a factor nineteen, disagrees $4$ standard deviations precisely measured atomic...