Esther Babette Menz
A5031636133- Atomic and Molecular Physics
- Nuclear physics research studies
- Nuclear Physics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Astronomical and nuclear sciences
- Advanced Chemical Physics Studies
- Radioactive contamination and transfer
- Mass Spectrometry Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Physics of Superconductivity and Magnetism
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Laser-induced spectroscopy and plasma
- Astro and Planetary Science
- Advanced NMR Techniques and Applications
- Plasma Applications and Diagnostics
- Superconducting and THz Device Technology
- Superconducting Materials and Applications
- Electron Spin Resonance Studies
- Nuclear reactor physics and engineering
- Nuclear and radioactivity studies
- Neutrino Physics Research
- Quantum and Classical Electrodynamics
GSI Helmholtz Centre for Heavy Ion Research
2020-2025
Friedrich Schiller University Jena
2019-2025
Helmholtz Institute Jena
2019-2025
Justus-Liebig-Universität Gießen
2023
We report the application of new elimination Rutherford elastic scattering technique for measurement proton-induced reaction cross sections utilizing stored ions decelerated to astrophysical energies. This approach results in a background reduction factor about 1 order magnitude, enabling first (p, n) section storage ring. Here, channels ^{124}Xe(p,n) and ^{124}Xe(p,γ) have been studied just above neutron threshold energy. The data provide valuable constraints Hauser-Feshbach theory...
The electron cooler of the CRYRING@ESR storage ring at GSI-FAIR accelerator complex is a unique instrument, which not only provides beam cooling stored ions, but also serves as low-energy target for Dielectronic Recombination experiments. minimisation vacuum contamination and response to rapid energy changes are key requirements in mode. Therefore, test bench was prepared study outgassing behaviour gun components setup constructed evaluate drift-electrode-modulation acceleration voltage...
Abstract Electron-ion collision spectroscopy at heavy-ion storage rings aims precision measurements of resonance features that occur in the cross sections electron processes such as electron-impact ionization ions or electron-ion recombination. As part international FAIR project low-energy ion ring CRYRING@ESR has been coupled with accelerators operated by GSI Helmholtz Center for Heavy-Ion Research Darmstadt, Germany. This opens up a new perspective testing strong field quantum...
We present the first nuclear cross-section measurements of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mo stretchy="false">(</a:mo><a:mi mathvariant="normal">p</a:mi><a:mo>,</a:mo><a:mi>γ</a:mi><a:mo stretchy="false">)</a:mo></a:mrow></a:math> and (p,n) reactions on <f:math xmlns:f="http://www.w3.org/1998/Math/MathML"...
Abstract Non-destructive Schottky detectors are indispensable devices widely used in experiments at heavy-ion storage rings. In particular, they can be to accurately determine the masses and lifetimes of short-lived exotic nuclear species. Single-ion sensitivity -- which enables highest has been regularly achieved past utilizing resonant cavity detectors. Recent designs analysis methods aim pushing limits measurement accuracy by increasing dimensionality acquired data, namely position...
Using novel metallic magnetic calorimeter detectors at the CRYRING@ESR, we recorded x-ray spectra of stored and electron cooled heliumlike uranium (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi mathvariant="normal">U</a:mi></a:mrow><a:mrow><a:mn>90</a:mn><a:mo>+</a:mo></a:mrow></a:msup></a:mrow></a:math>) with an unmatched spectral resolution close to 90 eV. This allowed for accurate determination energies all four components <d:math...
Abstract The application of software defined radio in on-line interaction with the beam processes heavy ion storage ring is presented. It discussed how this new technique can enhance time efficiency and open up measurement possibilities. Discussed a specific example to halt accelerator running case rare stored particle identified online.
For decelerated bare lead ions at a low beam energy of 10 MeV/u, the x-ray emission associated with radiative recombination (RR) threshold energies has been studied electron cooler CRYRING@ESR GSI, Darmstadt. In our experiment, we observed full pattern by utilizing dedicated detection chambers installed ${0}^{\ensuremath{\circ}}$ and ${180}^{\ensuremath{\circ}}$ observation geometry. Most remarkably, no line distortion effects due to delayed are present in well-defined spectra, spanning wide...
We report on the first integration of novel magnetic microcalorimeter detectors (MMCs), developed within SPARC (Stored Particles Atomic Physics Research Collaboration), into experimental environment storage rings at GSI, Darmstadt, namely electron cooler CRYRING@ESR. Two these detector systems were positioned 0$^\circ$ and 180$^\circ$ view ports section to obtain high-resolution x-ray spectra originating from a stored beam hydrogen-like uranium interacting with electrons. While previous test...
Abstract In the last decade nuclear reaction measurements using heavy ion storage rings became an important tool for astrophysics studies. The new CRYRING Array Reaction MEasurements (CARME), recently commissioned at low energy CRYRING@ESR ring (GSI/FAIR), is designed to take this novel approach one step further and perform direct stellar energies, as well indirect studies of properties interest astrophysics. unique worldwide in being able store high quality, isotopically pure, radioactive...
Radioactive nuclei with lifetimes on the order of millions years can reveal formation history Sun and active nucleosynthesis occurring at time place its birth. Among such whose decay signatures are found in oldest meteorites, $^{205}$Pb is a powerful example, as it produced exclusively by slow neutron captures (the s process), most being synthesized asymptotic giant branch (AGB) stars. However, making accurate abundance predictions for has so far been impossible because weak rates $^{205}$Tl...
We present an experimental and theoretical study of symmetric ${\text{Xe}}^{54+}+\text{Xe}$ collisions at 50, 30, 15 MeV/u, corresponding to strong perturbations with ${v}_{K}/{v}_{\text{p}}=1.20$, 1.55, 2.20, respectively (${v}_{K}$ is the classical $K$-shell orbital velocity ${v}_{\text{p}}$ projectile velocity), as well ${\text{Xe}}^{53+}+\text{Xe}$ MeV/u. For each these systems, x-ray spectra are measured under a forward angle ${35}^{\ensuremath{\circ}}$ respect beam. Target satellite...
Experimental determination of the cross sections proton capture on radioactive nuclei is extremely difficult. Therefore, it substantial interest for understanding production p-nuclei. For first time, a direct measurement proton-capture stored, ions became possible in an energy range nuclear astrophysics. The experiment was performed at Storage Ring (ESR) GSI by making use sensitive method to measure (p, γ ) and (p,n) reactions inverse kinematics. These reaction channels are high relevance...
We report on a new experimental approach for the Doppler correction of X-rays emitted by heavy ions, using novel metallic magnetic calorimeter detectors which uniquely combine high spectral resolution with broad bandwidth acceptance. The measurement was carried out at electron cooler CRYRING@ESR GSI, Darmstadt, Germany. X-ray emission associated radiative recombination electrons and stored hydrogen-like uranium ions investigated two microcalorimeter positioned under 0∘ 180∘ respect to ion...
We report on double differential cross sections of cusp electrons obtained in MeV/u collisions open-shell He-like oxygen ions with helium. use zero-degree electron spectroscopy and our measurement technique, involving ${\mathrm{O}}^{6+}(1{s}^{2})$ ground-state ${\mathrm{O}}^{6+}(1{s}^{2},1s2s)$ mixed-state beams, to extract the contribution from only excited ${\mathrm{O}}^{6+}(1s2s)$ beam. Theoretical calculations based continuum distorted wave eikonal initial state are very good agreement...
The low-energy heavy ion storage ring CRYRING was transported from Stockholm to Darmstadt, modernized and reconfigured, recommissioned as CRYRING@ESR. machine is now in operation with all installations service available a user facility for experiments proposed through the SPARC collaboration. During 2020–2022 period, we brought number of experimental into used them measure first data: ultra-cold electron cooler merged-beam electron–ion collisions, gas jet target atomic next-generation...
Using novel metallic magnetic calorimeter detectors at the CRYRING@ESR, we recorded X-ray spectra of stored and electron cooled helium-like uranium (U$^{90+}$) with an unmatched spectral resolution close to 90 eV. This allowed for accurate determination energies all four components K$\alpha$ transitions in U$^{90+}$. We find good agreement state-of-the-art bound-state QED calculations strong-field regime. Our results do not support any systematic deviation between experiment theory systems,...
Stable $^{205}$Tl ions have the lowest known energy threshold for capturing electron neutrinos ($\nu_e$) of ${ E}_{\nu_e}\ge50.6$\,keV. The Lorandite Experiment (LOREX), proposed in 1980s, aims at obtaining longtime averaged solar neutrino flux by utilizing natural deposits Tl-bearing lorandite ores. To determine $\nu_e$ capture cross section, it is required to know strength weak transition connecting ground state and 2.3 keV first excited $^{205}$Pb. only way experimentally address this...
We present a recently established setup for laser spectroscopy at CRYRING@ESR the GSI Helmholtz Centre Heavy Ion Research. Here, can be performed on stored and cooled ion bunches coasting beams. First spectra of $^{24,25}$Mg$^+$ ions are presented that were recorded by classical Doppler-limited fluorescence as well $\Lambda$-spectroscopy using counter- copropagating beams Doppler-shifted several nm.
In this report, we compare two filter algorithms for extracting timing information using novel metallic magnetic calorimeter detectors, applied to the precision X-ray spectroscopy of highly charged ions in a storage ring. Accurate is crucial when exploiting coincidence conditions background suppression obtain clean spectra. For X-rays emitted by charge-changing interactions between and target, well-established technique relying on conventional semiconductor detectors that offer good temporal...
With the unprecedented range of ion species and energies offered by newly commissioned CRYRING facility, availability single detectors is significant importance as part standard instrumentation well for novel experiments. A detector system was constructed on basis YAP:Ce crystal scintillator, which at once radiation‐hard, fast, affordable. Results a characterization experiment confirmed feasibility setup incident rates order MHz found critical fluence some 10 13 cm −2 upon rendered locally...
Synopsis A detector based on the scintillator material YAP:Ce and capable of counting single ions is present-ed. The consists a crystal light guide operating in ultra high vacuum convention-al photomultiplier outside vauum. demonstrated necessary radiation hardness against heavy ion irradiation. has been commissioned at CRYRING@ESR its detection capabilities have confirmed with beam from local source.
Synopsis CRYRING was moved from Stockholm to Darmstadt, modernized and integrated into the GSI/FAIR beamline topology behind ESR. As CRYRING@ESR, it will receive store heavy, highly charged ions all species present accelerator chain is capable of producing. An extensive research program on low-energy atomic collisions, spectroscopy nuclear reactions proposed. The facility gradually completing commissioning, ion beams local injector branch have already been stored prototype experiments...