B. Löher
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View article: An asymmetric fission island driven by shell effects in light fragments
An asymmetric fission island driven by shell effects in light fragments Open
Nuclear fission leads to the splitting of a nucleus into two fragments 1,2 . Studying the distribution of the masses and charges of the fragments is essential for establishing the fission mechanisms and refining the theoretical models 3,4 …
View article: Nuclear Astrophysics in the Storage Ring: Background Suppressed Simultaneous Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>n</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> Reactions
Nuclear Astrophysics in the Storage Ring: Background Suppressed Simultaneous Measurement of and Reactions Open
We report the application of the new elimination of Rutherford elastic scattering technique for the measurement of proton-induced reaction cross sections utilizing stored ions decelerated to astrophysical energies. This approach results in…
View article: Earthquake precursor measurements employing a network of radon sensors
Earthquake precursor measurements employing a network of radon sensors Open
Earthquakes, as one of the most prominent natural disasters, pose a severe threat to societies in regions near active fault lines. Being able to forecast when, where and how strong an earthquake will be is beyond current scientific capabil…
View article: Quantum Electrodynamics in Strong Electromagnetic Fields: Substate Resolved K$α$ Transition Energies in Helium-like Uranium
Quantum Electrodynamics in Strong Electromagnetic Fields: Substate Resolved K$α$ Transition Energies in Helium-like Uranium Open
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 of close to 90 eV. This allowed for an ac…
View article: Design and Testing of a new Tracking System for the Proton Charge Radius Measurement with the AMBER Experiment at CERN
Design and Testing of a new Tracking System for the Proton Charge Radius Measurement with the AMBER Experiment at CERN Open
The concept of the unified tracking station designed for the proton charge-radius measurement planned at the AMBER (NA66) fixed-target experiment at CERN is presented. Composed of scintillating-fiber hodoscope and silicon-pixel detectors, …
View article: Relativistic Coulomb Excitation of \(^{124}\)Sn
Relativistic Coulomb Excitation of \(^{124}\)Sn Open
The Coulomb excitation of 124, 128, 130, 132, 134Sn isotopes in the electric field of a Pb target have been studied using the R3B setup as a part of the FAIR Phase-0 program. The experiment was motivated by the possibility of using the nuc…
View article: Measurements of the Reaction Cross Sections of Neutron-rich Sn Isotopes at the R\(^3\)B Setup
Measurements of the Reaction Cross Sections of Neutron-rich Sn Isotopes at the R\(^3\)B Setup Open
A fundamental framework to describe nuclear matter as a function of pressure and nuclear isospin asymmetry is the nuclear Equation of State (EoS). Constraining the parameters of the EoS is one of the central issues in nuclear physics, espe…
View article: Quasi-free (p,2p) reactions in inverse kinematics for studying the fission yield dependence on temperature
Quasi-free (p,2p) reactions in inverse kinematics for studying the fission yield dependence on temperature Open
Despite the recent experimental and theoretical progress in the investigation of the nuclear fission process, a complete description still represents a challenge in nuclear physics because it is a very complex dynamical process, whose desc…
View article: Towards an Intrinsic Doppler Correction for X-ray Spectroscopy of Stored Ions at CRYRING@ESR
Towards an Intrinsic Doppler Correction for X-ray Spectroscopy of Stored Ions at CRYRING@ESR Open
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 a high spectral resolution with a broad bandwidth acceptance. T…
View article: Proton capture on stored radioactive <sup>118</sup>Te ions
Proton capture on stored radioactive <sup>118</sup>Te ions Open
Experimental determination of the cross sections of proton capture on radioactive nuclei is extremely difficult. Therefore, it is of substantial interest for the understanding of the production of the p-nuclei. For the first time, a direct…
View article: Fragmentation-induced fission reactions of <sup>236</sup>U in inverse kinematics to investigate the pre-fragment angular momentum parameterizations
Fragmentation-induced fission reactions of <sup>236</sup>U in inverse kinematics to investigate the pre-fragment angular momentum parameterizations Open
In the last decades, measurements of spallation, fragmentation and Coulex induced fission reactions in inverse kinematics have provided valuable data to accurately investigate the fission dynamics and nuclear structure at large deformations …
View article: Exploitation of the Timing Capabilities of Metallic Magnetic Calorimeters for a Coincidence Measurement Scheme
Exploitation of the Timing Capabilities of Metallic Magnetic Calorimeters for a Coincidence Measurement Scheme Open
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 timing i…
View article: Integration of maXs-type microcalorimeter detectors for high-resolution x-ray spectroscopy into the experimental environment at the CRYRING@ESR electron cooler
Integration of maXs-type microcalorimeter detectors for high-resolution x-ray spectroscopy into the experimental environment at the CRYRING@ESR electron cooler Open
We report on the first integration of novel magnetic microcalorimeter detectors (MMCs), developed within SPARC (Stored Particles Atomic Physics Research Collaboration), into the experimental environment of storage rings at GSI 6 6 GSI Helm…
View article: VME Readout at and Below the Conversion Time Limit
VME Readout at and Below the Conversion Time Limit Open
The achievable acquisition rates of modern triggered nuclear physics experiments are heavily dependent on the readout software, in addition to the limits given by the utilized hardware. This paper presents an asynchronous readout scheme th…
View article: Multi-messenger investigation of the Pygmy Dipole Resonance in 140Ce
Multi-messenger investigation of the Pygmy Dipole Resonance in 140Ce Open
We report on the first (p, p'gamma) experiments at E-p = 80 MeV to investigate the Pygmy Dipole Resonance (PDR) in the semi-magic nucleus Ce-140. This experiment is the latest in a series of experiments to investigate the PDR with differen…
View article: Shape mixing in 0<i>νββ</i> candidates
Shape mixing in 0<i>νββ</i> candidates Open
Weak processes are typically observed through nuclear effects, as they mediate between different eigenstates of either one nucleus, or a pair of nuclei. Since the derivation of important parameters of the weak interaction and weakly-intera…
View article: Study of photon strength functions via (<i>γ<sup>→</sup></i>, <i>γ</i><sup>′</sup>, <i>γ</i><sup>″</sup>) reactions at the <i>γ</i><sup>3</sup>-setup
Study of photon strength functions via (<i>γ<sup>→</sup></i>, <i>γ</i><sup>′</sup>, <i>γ</i><sup>″</sup>) reactions at the <i>γ</i><sup>3</sup>-setup Open
One of the basic ingredients for the modelling of the nucleosynthesis of heavy elements are so-called photon strength functions and the assumption of the Brink-Axel hypothesis. This hypothesis has been studied for many years by numerous ex…
View article: Probing the <i>E2</i> properties of the scissors mode with real photons
Probing the <i>E2</i> properties of the scissors mode with real photons Open
The E2/M1 multipole mixing ratio δ 1→2 of the 1 + sc → 2 + 1 γ -ray transition of 156 Gd and 164 Dy has been measured using the linearly polarized photon beams of the HI γ S facility. The employed method of photonscattering experiments in …
View article: Nuclear structure of <sup>82</sup>Kr and <sup>82</sup>Se relevant for neutrinoless double-beta decay
Nuclear structure of <sup>82</sup>Kr and <sup>82</sup>Se relevant for neutrinoless double-beta decay Open
Nuclear Resonance Fluorescence (NRF) experiments on the nuclei 82Kr and 82Se were performed, that are a candidates for a mother-daughter pair for the hypothetical neutrinoless double-beta (0ν ββ ) decay. The experiment aimed at providing h…
View article: Capture cross sections on unstable nuclei
Capture cross sections on unstable nuclei Open
\nAccurate neutron-capture cross sections on unstable nuclei near the line of beta stability are crucial for understanding the s-process nucleosynthesis. However, neutron-capture cross sections for short-lived radionuclides are difficult t…
View article: Capture cross sections on unstable nuclei
Capture cross sections on unstable nuclei Open
Accurate neutron-capture cross sections on unstable nuclei near the line of beta stability are crucial for understanding the s-process nucleosynthesis. However, neutron-capture cross sections for short-lived radionuclides are difficult to …