First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer
| Autor: | A. Knecht, X. Fabian, Ferenc Glück, E. Traykov, P. Finlay, C. Couratin, M. Tandecki, P. Friedag, S. Van Gorp, T. Porobic, Marcus Beck, Ch. Weinheimer, V. Kozlov, Xavier Flechard, D. Zákoucký, G. Ban, Nathal Severijns, E. Liénard, G. Soti, Alexander Herlert, M. Breitenfeldt, E. Wursten |
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| Přispěvatelé: | Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Westfälische Wilhelms-Universität Münster (WWU), Karlsruher Institut für Technologie (KIT), FAIR, Planckstr. 1, 64291, Darmstadt, Germany (FAIR), TRIUMF [Vancouver], Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Atomic Physics Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan, Czech Academy of Sciences [Prague] (CAS), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Westfälische Wilhelms-Universität Münster = University of Münster (WWU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
Nuclear and High Energy Physics Spectrometer 010308 nuclear & particles physics Physics::Instrumentation and Detectors WITCH Penning trap Hadron Detector [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] beta-neutrino correlation 01 natural sciences Ion Nuclear physics Recoil Data acquisition weak interaction retardation spectrometer 0103 physical sciences Nuclear fusion Nuclear Physics - Experiment beta decay 010306 general physics |
| Zdroj: | European Physical Journal A European Physical Journal A, EDP Sciences, 2016, 52 (7), ⟨10.1140/epja/i2016-16206-y⟩ European Physical Journal A, 2016, 52 (7), ⟨10.1140/epja/i2016-16206-y⟩ The European Physical Journal A |
| ISSN: | 1434-6001 1434-601X |
| DOI: | 10.1140/epja/i2016-16206-y⟩ |
| Popis: | The first high-statistics and high-resolution data set for the integrated recoil-ion energy spectrum following the β+ decay of 35Ar has been collected with the WITCH retardation spectrometer located at CERN-ISOLDE. Over 25 million recoil-ion events were recorded on a large-area micro-channel plate (MCP) detector with a time-stamp precision of 2 ns and position resolution of 0.1mm due to the newly upgraded data acquisition based on the LPC Caen FASTER protocol. The number of recoil ions was measured for more than 15 different settings of the retardation potential, complemented by dedicated background and half-life measurements. Previously unidentified systematic effects, including an energy-dependent efficiency of the main MCP and a radiation-induced time-dependent background, have been identified and incorporated into the analysis. However, further understanding and treatment of the radiation-induced background requires additional dedicated measurements and remains the current limiting factor in extracting a beta-neutrino angular correlation coefficient for 35Ar decay using the WITCH spectrometer. ispartof: European Physical Journal A, Hadrons and Nuclei vol:52 issue:7 pages:1-16 status: published |
| Databáze: | OpenAIRE |
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