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View article: News from the GBAR experiment: Improved positron accumulation in a buffer gas trap with a silicon carbide remoderator
News from the GBAR experiment: Improved positron accumulation in a buffer gas trap with a silicon carbide remoderator Open
The aim of the GBAR experiment is to measure the gravitational acceleration of antihydrogen by observing the free fall of ultracold anti-atoms. The experiment is installed at CERN’s Antiproton Decelerator/ELENA facility. Positrons are prod…
View article: Bayesian approach for strong-field QED tests with He-like ions
Bayesian approach for strong-field QED tests with He-like ions Open
International audience
View article: Socio-Demographic Correlates of Health and Nutrition Among Rural and Plantation Communities of the western Dooars, Jalpaiguri district, West Bengal, India
Socio-Demographic Correlates of Health and Nutrition Among Rural and Plantation Communities of the western Dooars, Jalpaiguri district, West Bengal, India Open
Health and nutrition outcomes are profoundly influenced by socio-demographic factors, particularly in economically and geographically marginalized communities. This study investigated the health and nutritional status of tea garden workers…
View article: Excited States in the Neutron Rich Nuclei \(^{46}\)S and \(^{47}\)S
Excited States in the Neutron Rich Nuclei \(^{46}\)S and \(^{47}\)S Open
Data on the structure of sulphur isotopes close to the neutron drip-line are rather scarce. The excited states of the very neutron-rich \(^{46}\)S and \(^{47}\)S nuclei have been investigated by in-beam gamma-ray spectroscopy at the Radioa…
View article: Towards Precision Spectroscopy of Antiprotonic Atoms for Probing Strong-field QED
Towards Precision Spectroscopy of Antiprotonic Atoms for Probing Strong-field QED Open
PAX (antiProtonic Atom X-ray spectroscopy) is a new experiment with the aim to test strong-field quantum electrodynamics (QED) effects by performing high-precision x-ray spectroscopy of antiprotonic atoms. By utilizing advanced microcalori…
View article: Towards Precision Spectroscopy of Antiprotonic Atoms for Probing Strong-field QED
Towards Precision Spectroscopy of Antiprotonic Atoms for Probing Strong-field QED Open
PAX (antiProtonic Atom X-ray spectroscopy) is a new experiment with the aim to test strong-field quantum electrodynamics (QED) effects by performing high-precision x-ray spectroscopy of antiprotonic atoms. By utilizing advanced microcalori…
View article: A Bayesian Approach for Strong Field QED Tests with He-like Ions
A Bayesian Approach for Strong Field QED Tests with He-like Ions Open
Detailed comparisons between theory and experiment for quantum electrodynamics (QED) effects in He-like ions have been performed in the literature to search for hints of new physics. Different frequentist statistical analyses of the existi…
View article: High-precision, reference-free measurements of 2p → 1s transitions in boron-like sulfur and argon
High-precision, reference-free measurements of 2p → 1s transitions in boron-like sulfur and argon Open
International audience
View article: Few-electron highly charged muonic Ar atoms verified by electronic $K$ x rays
Few-electron highly charged muonic Ar atoms verified by electronic $K$ x rays Open
Electronic $K$ x rays emitted by muonic Ar atoms in the gas phase were observed using a superconducting transition-edge-sensor microcalorimeter. The high-precision energy spectra provided a clear signature of the presence of muonic atoms a…
View article: Gamma-ray spectroscopy of <sup>55</sup>Sc
Gamma-ray spectroscopy of <sup>55</sup>Sc Open
The N = 34 isotope 55 Sc has been investigated using in-beam γ -ray spectroscopy at the RIKEN Radioactive Isotope Beam Factory. Spectra from the direct ( p , pn ) reaction as well as indirect reaction channels have been investigated. γ ray…
View article: High-precision, reference-free measurements of 2p $\rightarrow$ 1s transitions in boron-like sulfur and argon
High-precision, reference-free measurements of 2p $\rightarrow$ 1s transitions in boron-like sulfur and argon Open
We have measured several 2p $\rightarrow$ 1s transition energies in core-excited boron-like ions of sulfur and argon. The measurements are reference-free, with an accuracy of a few parts per million. The x-rays were produced by the plasma …
View article: MMC Array to Study X-Ray Transitions in Muonic Atoms
MMC Array to Study X-Ray Transitions in Muonic Atoms Open
The QUARTET collaboration aims to significantly improve the precision of the absolute nuclear charge radii of light nuclei from Li to Ne by using an array of metallic magnetic calorimeters to perform high-precision X-ray spectroscopy of lo…
View article: Towards Precision Muonic X-ray Measurements of Charge Radii of Light Nuclei
Towards Precision Muonic X-ray Measurements of Charge Radii of Light Nuclei Open
We, the QUARTET Collaboration, propose an experiment to measure the nuclear charge radii of light elements with up to 20 times higher accuracy. These are essential both for understanding nuclear physics at low energies, and for experimenta…
View article: Publisher Erratum: Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud
Publisher Erratum: Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud Open
We report on the first production of an antihydrogen beam by charge exchange of 6.1 keV antiprotons with a cloud of positronium in the GBAR experiment at CERN.The antiproton beam was delivered by the AD/ELENA facility.The positronium targe…
View article: MMC Array to Study X-ray Transitions in Muonic Atoms
MMC Array to Study X-ray Transitions in Muonic Atoms Open
The QUARTET collaboration aims to significantly improve the precision of the absolute nuclear charge radii of light nuclei from Li to Ne by using an array of metallic magnetic calorimeters to perform high-precision X-ray spectroscopy of lo…
View article: Diffusion of muonic hydrogen in hydrogen gas and the measurement of the 1$s$ hyperfine splitting of muonic hydrogen
Diffusion of muonic hydrogen in hydrogen gas and the measurement of the 1$s$ hyperfine splitting of muonic hydrogen Open
The CREMA collaboration is pursuing a measurement of the ground-state hyperfine splitting (HFS) in muonic hydrogen ( \mu p) with 1 ppm accuracy by means of pulsed laser spectroscopy. In the proposed experiment, the \mu p atom is excite…
View article: X-ray spectroscopy of few-electron uranium ions for tests of QED
X-ray spectroscopy of few-electron uranium ions for tests of QED Open
International audience
View article: Proof-of-Principle Experiment for Testing Strong-Field Quantum Electrodynamics with Exotic Atoms: High Precision X-Ray Spectroscopy of Muonic Neon
Proof-of-Principle Experiment for Testing Strong-Field Quantum Electrodynamics with Exotic Atoms: High Precision X-Ray Spectroscopy of Muonic Neon Open
To test bound-state quantum electrodynamics (BSQED) in the strong-field regime, we have performed high precision x-ray spectroscopy of the 5g-4f and 5f- 4d transitions (BSQED contribution of 2.4 and 5.2 eV, respectively) of muonic neon ato…
View article: Report on 2211.08297v2
Report on 2211.08297v2 Open
The CREMA collaboration is pursuing a measurement of the ground-state hyperfine splitting (HFS) in muonic hydrogen (µp) with 1 ppm accuracy by means of pulsed laser spectroscopy.In the proposed experiment, the µp atom is excited by a laser…
View article: Absolute measurement of the relativistic magnetic dipole transition in He-like sulfur
Absolute measurement of the relativistic magnetic dipole transition in He-like sulfur Open
We have made the first absolute, reference-free measurement of the 1s2s 3 S1 $\rightarrow$ 1s 2 1 S0 relativistic magnetic dipole transition in He-like sulfur. The highly-charged S ions were provided by an electron-cyclotron resonance ion …
View article: Muonic-Atom Spectroscopy and Impact on Nuclear Structure and Precision QED Theory
Muonic-Atom Spectroscopy and Impact on Nuclear Structure and Precision QED Theory Open
Recent progress in laser and x-ray spectroscopy of muonic atoms offers promising long-term possibilities at the intersection of atomic, nuclear and particle physics. In muonic hydrogen, laser spectroscopy measurements will determine the gr…
View article: First Direct Measurement of C 12 (C 12,n) Mg 23 at Stellar Energies
First Direct Measurement of C 12 (C 12,n) Mg 23 at Stellar Energies Open
Neutrons produced by the carbon fusion reaction C12(C12,n)Mg23 play an important role in stellar nucleosynthesis. However, past studies have shown large discrepancies between experimental data and theory, leading to an uncertain cross sect…