Institution
Paul Scherrer Institute
Facility•Villigen, Switzerland•
About: Paul Scherrer Institute is a facility organization based out in Villigen, Switzerland. It is known for research contribution in the topics: Neutron & Large Hadron Collider. The organization has 9248 authors who have published 23984 publications receiving 890129 citations. The organization is also known as: PSI.
Topics: Neutron, Large Hadron Collider, Scattering, Catalysis, Aerosol
Papers published on a yearly basis
Papers
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01 Jun 2007-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
TL;DR: The mini radiocarbon dating system (MICADAS) as mentioned in this paper is based on a vacuum insulated acceleration unit that uses a commercially available 200kV power supply to generate acceleration fields in a tandem configuration.
Abstract: A novel tabletop AMS system with overall dimensions of only 2.5 × 3 m 2 has been built and tested. The mini radiocarbon dating System (MICADAS) is based on a vacuum insulated acceleration unit that uses a commercially available 200 kV power supply to generate acceleration fields in a tandem configuration. At the high-energy end, ions in charge state 1 + are selected and interfering molecules of mass 14 amu are destroyed in multiple collisions. The new system is now fully operational. It is the prototype of a new generation of radiocarbon spectrometers which fulfill the requirements for radiocarbon dating applications as well as for the less demanding 14 C/ 12 C isotopic ratio measurements as needed, e.g. in biomedical applications. A detailed description of the system is given and results of performance tests are discussed.
497 citations
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TL;DR: A direct stepwise method for converting methane into methanol with high selectivity over a copper-containing zeolite, based on partial oxidation with water, involving methane oxidation at CuII oxide active centers, followed by CuI reoxidation by water with concurrent formation of hydrogen.
Abstract: Direct functionalization of methane in natural gas remains a key challenge. We present a direct stepwise method for converting methane into methanol with high selectivity (~97%) over a copper-containing zeolite, based on partial oxidation with water. The activation in helium at 673 kelvin (K), followed by consecutive catalyst exposures to 7 bars of methane and then water at 473 K, consistently produced 0.204 mole of CH3OH per mole of copper in zeolite. Isotopic labeling confirmed water as the source of oxygen to regenerate the zeolite active centers and renders methanol desorption energetically favorable. On the basis of in situ x-ray absorption spectroscopy, infrared spectroscopy, and density functional theory calculations, we propose a mechanism involving methane oxidation at CuII oxide active centers, followed by CuI reoxidation by water with concurrent formation of hydrogen.
495 citations
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TL;DR: In this paper, four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the minimal supersymmetric standard model (MSSM).
Abstract: The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric standard model (MSSM). The data of the four collaborations are statistically combined and examined for their consistency with the background hypothesis and with a possible Higgs boson signal. The combined LEP data show no significant excess of events which would indicate the production of Higgs bosons. The search results are used to set upper bounds on the cross-sections of various Higgs-like event topologies. The results are interpreted within the MSSM in a number of “benchmark” models, including CP-conserving and CP-violating scenarios. These interpretations lead in all cases to large exclusions in the MSSM parameter space. Absolute limits are set on the parameter cosβ and, in some scenarios, on the masses of neutral Higgs bosons.
494 citations
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TL;DR: In this article, the hygroscopic properties of freshly produced carbon and diesel soot particles at subsaturations (i.e. at relative humidity < 100%) were investigated. And the results showed that freshly emitted combustion particles are unlikely to act as cloud condensation nuclei whereas an aging of the particles will enhance their nucleation ability.
493 citations
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University of Sussex1, Paul Scherrer Institute2, Rutherford Appleton Laboratory3, University of Caen Lower Normandy4, Jagiellonian University5, German National Metrology Institute6, University of Fribourg7, Katholieke Universiteit Leuven8, University of Grenoble9, University of Mainz10, ETH Zurich11, University of Paris-Sud12
TL;DR: In this paper, a detailed and comprehensive analysis of the experimental results that set the current world sensitivity limit on the magnitude of the electric dipole moment (EDM) of the neutron is presented.
Abstract: We present for the first time a detailed and comprehensive analysis of the experimental results that set the current world sensitivity limit on the magnitude of the electric dipole moment (EDM) of the neutron. We have extended and enhanced our earlier analysis to include recent developments in the understanding of the effects of gravity in depolarizing ultracold neutrons; an improved calculation of the spectrum of the neutrons; and conservative estimates of other possible systematic errors, which are also shown to be consistent with more recent measurements undertaken with the apparatus. We obtain a net result of dn=−0.21±1.82×10−26 e cm, which may be interpreted as a slightly revised upper limit on the magnitude of the EDM of 3.0×10−26 e cm (90% C.L.) or 3.6×10−26 e cm (95% C.L.).
492 citations
Authors
Showing all 9348 results
Name | H-index | Papers | Citations |
---|---|---|---|
Andrea Bocci | 172 | 2402 | 176461 |
Tobin J. Marks | 159 | 1621 | 111604 |
Wolfgang Wagner | 156 | 2342 | 123391 |
David D'Enterria | 150 | 1592 | 116210 |
Andreas Pfeiffer | 149 | 1756 | 131080 |
Christoph Grab | 144 | 1359 | 144174 |
Maurizio Pierini | 143 | 1782 | 104406 |
Alexander Belyaev | 142 | 1895 | 100796 |
Ajit Kumar Mohanty | 141 | 1124 | 93062 |
Felicitas Pauss | 141 | 1623 | 104493 |
Chiara Mariotti | 141 | 1426 | 98157 |
Luc Pape | 141 | 1441 | 130253 |
Rainer Wallny | 141 | 1661 | 105387 |
Roland Horisberger | 139 | 1471 | 100458 |
Emmanuelle Perez | 138 | 1550 | 99016 |