skip to main content

Title: Muon detection studied by pulse-height energy analysis: Novel converter arrangements

Muons are conventionally measured by a plastic scintillator–photomultiplier detector. Muons from processes in ultra-dense hydrogen H(0) are detected here by a novel type of converter in front of a photomultiplier. The muon detection yield can be increased relative to that observed with a plastic scintillator by at least a factor of 100, using a converter of metal, semiconductor (Ge), or glass for interaction with the muons penetrating through the metal housing of the detector. This detection process is due to transient formation of excited nuclei by the well-known process of muon capture, giving beta decay. The main experimental results shown here are in the form of beta electron energy spectra detected directly by the photomultiplier. Events which give a high-energy tail in the energy spectra are probably due to gamma photons from the muons. Sharp and intense x-ray peaks from a muonic aluminium converter or housing material are observed. The detection conversion in glass and Ge converters has a time constant of the order of many minutes to reach the final conversion level, while the process in metal converters is stabilized faster. The time constants are not due to lifetimes of the excited nuclei or neutrons but are due tomore » internal charging in the insulating converter material. Interaction of this charging with the high voltage in the photomultiplier is observed.« less
Authors:
 [1] ;  [2]
  1. Atmospheric Science, Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Göteborg (Sweden)
  2. Faculty of Physical Sciences, University of Iceland, Reykjavik (Iceland)
Publication Date:
OSTI Identifier:
22482732
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALUMINIUM; BETA DECAY; ENERGY SPECTRA; MUON DETECTION; MUONS; NEUTRONS; NUCLEI; PLASTIC SCINTILLATION DETECTORS; PLASTICS; PULSES; SEMICONDUCTOR MATERIALS; X RADIATION