Search Results - "Märkisch, B."
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Measurement of the Weak Axial-Vector Coupling Constant in the Decay of Free Neutrons Using a Pulsed Cold Neutron Beam
Published in Physical review letters (21-06-2019)“…We present a precision measurement of the axial-vector coupling constant g_{A} in the decay of polarized free neutrons. For the first time, a pulsed cold…”
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Exotic decay channels are not the cause of the neutron lifetime anomaly
Published in Physics letters. B (10-04-2019)“…Since long neutron lifetimes measured with a beam of cold neutrons are significantly different from lifetimes measured with ultracold neutrons bottled in a…”
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Constraints on the Dark Matter Interpretation n→χ+e^{+}e^{-} of the Neutron Decay Anomaly with the PERKEO II Experiment
Published in Physical review letters (07-06-2019)“…Discrepancies from in-beam- and in-bottle-type experiments measuring the neutron lifetime are on the 4σ standard deviation level. In a recent publication…”
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Limit on the Fierz Interference Term b from a Measurement of the Beta Asymmetry in Neutron Decay
Published in Physical review letters (11-09-2020)“…In the standard model of particle physics, the weak interaction is described by vector and axial-vector couplings only. Nonzero scalar or tensor interactions…”
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A clean, bright, and versatile source of neutron decay products
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-11-2008)“…We present a case study on a new type of beam station for the measurement of angular correlations in the β-decay of free neutrons. This beam station, called…”
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Accurate Measurement of the Beta-Asymmetry in Neutron Decay Rules out Dark Decay Mode
Published in Surface investigation, x-ray, synchrotron and neutron techniques (01-10-2020)“…The question of the nature of dark matter is one of the major challenges of elementary particle physics. Not surprisingly, the recent suggestion of a dark…”
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Characterization of a ballistic supermirror neutron guide
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (15-06-2006)“…We describe the beam characteristics of the first ballistic supermirror neutron guide H113 that feeds the neutron user facility for particle physics PF1B of…”
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Measurement of the neutrino asymmetry parameter B in neutron decay
Published in Physical review letters (09-11-2007)“…A new measurement of the neutrino asymmetry parameter B in neutron decay, the angular correlation between neutron spin and antineutrino momentum, is presented…”
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Measurement of the proton asymmetry parameter in neutron beta decay
Published in Physical review letters (18-04-2008)“…The proton asymmetry parameter C in neutron decay describes the angular correlation between neutron spin and proton momentum. In this Letter, the first…”
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10
A non-depolarizing CuTi neutron supermirror guide for PERC
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-06-2022)“…Neutron guides are used to transport slow neutrons from sources to experiments. Conventional neutron supermirror guides use alternating thin layers based on…”
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4D Tomography for neutron depth profiling applications
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-08-2024)“…High-rate Neutron Depth Profiling (NDP) is a very efficient and precise probe for studying the evolution of lithium concentration in thin-layer structures,…”
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The new neutron depth profiling instrument N4DP at the Heinz Maier-Leibnitz Zentrum
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (11-12-2018)“…The cold neutron guide of the Prompt Gamma Activation Analysis (PGAA) instrument (Revay et al. 2015) at the Heinz Maier-Leibnitz Zentrum (MLZ) provides an…”
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Particle physics at the European Spallation Source
Published in Physics reports (2023)“…Presently under construction in Lund, Sweden, the European Spallation Source (ESS) will be the world’s brightest neutron source. As such, it has the potential…”
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Materials science applications of Neutron Depth Profiling at the PGAA facility of Heinz Maier-Leibnitz Zentrum
Published in Materials characterization (01-12-2018)“…Neutron depth profiling (NDP) is a non-destructive, isotope-sensitive profiling technique to monitor concentration profiles in almost any material matrix…”
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15
The point spread function of electrons in a magnetic field, and the decay of the free neutron
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-11-2014)“…Experiments in nuclear and particle physics often use magnetic fields to guide charged reaction products to a detector. Due to their gyration in the guide…”
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Determination of the Weak Axial Vector Coupling λ = g A / g V from a Measurement of the β -Asymmetry Parameter A in Neutron Beta Decay
Published in Physical review letters (01-04-2013)Get full text
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The new neutron decay spectrometer Perkeo III
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-12-2009)“…We present the new large neutron decay spectrometer Perkeo III designed to study neutron beta -decay in-beam. It offers largely improved statistics over its…”
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The Beta-, Neutrino- and Proton-Asymmetry in Neutron β-Decay
Published in Journal of research of the National Institute of Standards and Technology (01-07-2005)“…This article describes measurements of angular-correlation coefficients in the decay of free neutrons with the superconducting spectrometer PERKEO II. A method…”
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The new neutron decay spectrometer P erkeo III
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (2009)“…We present the new large neutron decay spectrometer P erkeo III designed to study neutron β -decay in-beam. It offers largely improved statistics over its…”
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Determination of the weak axial vector coupling λ = gA/gV from a measurement of the β-asymmetry parameter A in neutron beta decay
Published in Physical review letters (26-04-2013)“…We report on a new measurement of the neutron β-asymmetry parameter A with the instrument Perkeo II. The main enhancements are the high neutron polarization of…”
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