384 citations · 2.8k across the 120 of their papers we have counts for
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Upgrade of the positron system of the ASACUSA-Cusp experiment
A. Lanz, C. Amsler, H. Breuker +35
The ASACUSA-Cusp collaboration has recently upgraded the positron system to improve the production of antihydrogen. Previously, the experiment suffered from contamination of the va…
Measurement of the Principal Quantum Number Distribution in a Beam of Antihydrogen Atoms
B. Kolbinger, C. Amsler, S. Arguedas Cuendis +35
The ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) collaboration plans to measure the ground-state hyperfine splitting of antihydrogen in a beam at the CERN An…
A hydrogen beam to characterize the ASACUSA antihydrogen hyperfine spectrometer
C. Malbrunot, M. Diermaier, M. C. Simon +19
The antihydrogen programme of the ASACUSA collaboration at the antiproton decelerator of CERN focuses on Rabi-type measurements of the ground-state hyperfine splitting of antihydro…
Hyperfine spectroscopy of hydrogen and antihydrogen in ASACUSA
E. Widmann, C. Amsler, S. Arguedas Cuendis +31
The ASACUSA collaboration at the Antiproton Decelerator of CERN aims at a precise measurement of the antihydrogen ground-state hyperfine structure as a test of the fundamental CPT…
Velocity selected production of metastable positronium
C. Amsler, M. Antonello, A. Belov +52
Positronium in the metastable state exhibits a low electrical polarizability and a long lifetime (1140 ns) making it a promising candidate for interferometry experiments wit…
Experimental search for the violation of Pauli Exclusion Principle
H. Shi, E. Milotti, S. Bartalucci +25
The VIolation of Pauli exclusion principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for x-rays from copper atomic transition that are…
Producing long-lived Ps via laser excitation in magnetic and electric fields
S. Aghion, C. Amsler, M. Antonello +62
Producing positronium (Ps) in the metastable state is of interest for various applications in fundamental physics. We report here about an experiment in which Ps atom…
The ASACUSA antihydrogen and hydrogen program : results and prospects
C. Malbrunot, C. Amsler, S. Arguedas Cuendi +23
The goal of the ASACUSA-CUSP collaboration at the Antiproton Decelerator of CERN is to measure the ground-state hyperfine splitting of antihydrogen using an atomic spectroscopy bea…
Line shape analysis of the K transition in muonic hydrogen
D. S. Covita, D. F. Anagnostopoulos, H. Fuhrmann +19
The K transition in muonic hydrogen was measured with a high-resolution crystal spectrometer. The spectrum is shown to be sensitive to the ground-state hyperfine splitting, the…
In-beam measurement of the hydrogen hyperfine splitting - towards antihydrogen spectroscopy
M. Diermaier, C. B. Jepsen, B. Kolbinger +6
Antihydrogen, the lightest atom consisting purely of antimatter, is an ideal laboratory to study the CPT symmetry by comparison to hydrogen. With respect to absolute precision, tra…
Measurement of the hyperfine structure of antihydrogen in a beam
E. Widmann, M. Diermaier, B. Juhasz +10
A measurement of the hyperfine structure of antihydrogen promises one of the best tests of CPT symmetry. We describe an experiment planned at the Antiproton Decelerator of CERN to…
First observation of two hyperfine transitions in antiprotonic He-3
S. Friedreich, D. Barna, F. Caspers +11
We report on the first experimental results for microwave spectroscopy of the hyperfine structure of antiprotonic He-3. Due to the helium nuclear spin, antiprotonic He-3 has a more…
Line shape of the muH(3p - 1s) hyperfine transitions
D. S. Covita, D. F. Anagnostopoulos, H. Gorke +13
The (3p - 1s) X-ray transition to the muonic hydrogen ground state was measured with a high resolution crystal spectrometer. A Doppler effect broadening of the X-ray line was estab…
Highly charged ion X-rays from Electron-Cyclotron Resonance Ion Sources
Paul Indelicato, S. Boucard, D. S. Covita +13
Radiation from the highly-charged ions contained in the plasma of Electron-Cyclotron Resonance Ion Sources constitutes a very bright source of X-rays. Because the ions have a relat…
High Resolution He-like Argon And Sulfur Spectra From The PSI ECRIT
Martino Trassinelli, Sandor Biri, Stephane Boucard +12
We present new results on the X-ray spectroscopy of multicharged argon, sulfur and chlorine obtained with the Electron Cyclotron Resonance Ion Trap (ECRIT) in operation at the Paul…
On the characterisation of a Bragg spectrometer with X-rays from an ECR source
D. F. Anagnostopoulos, S. Biri, D. Gotta +8
Narrow X-ray lines from helium-like argon emitted from a dedicated ECR source have been used to determine the response function of a Bragg crystal spectrometer equipped with large…
Measurement of the Resonant Molecular Formation Rate in Solid HD
T. A. Porcelli, A. Adamczak, J. M. Bailey +17
Measurements of muon-catalyzed dt fusion () in solid HD have been performed. The theory describing the energy dependent resonant molecular formation rate for th…
X-ray emission during the muonic cascade in hydrogen
B. Lauss, P. Ackerbauer, W. H. Breunlich +13
We report our investigations of X rays emitted during the muonic cascade in hydrogen employing charge coupled devices as X-ray detectors. The density dependence of the relative X-r…