Titre du document

The use of gas proportional counters to distinguish protons from pions in the cosmic radiation at energies of near or greater than 100 GeV

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Nom du Corpus

AstroConcepts

Auteur(s)
  • P.V. Ramana Murthy 1
  • G.D. Demeester 1
Affiliation(s)
  • Department of Physics, University of Michigan, Ann Arbor, Michigan, U.S.A.
Résumé

Several possible methods to distinguish protons and pions in the cosmic radiation at energies of over 100 GeV are discussed. One of these methods based on multiple sampling of ionization losses in an array of gas proportional counters together with a measurement of energy in an ionization calorimeter or momentum in a magnet spectrograph is discussed in greater detail.Fluctuations in ionization losses (“Landau” fluctuations) make the method difficult but not impossible. Experimental results on Landau fluctuations with a variety of incident particles and energies are presented and it is shown that they are in better agreement with the theory of Blunck and Leisegang than with that of Landau.Artificial events in which the sampled ionization losses obeyed the Landau and Blunck and Leisegang distributions are generated on a computer by a Monte Carlo program. Based on an analysis of a sample of 20000 such events by likelihood ratio method the attainable proton-pion separation in the cosmic radiation at 100 GeV energy is presented.

Langue(s) du document
Anglais
Année de publication
1967
Revue

Nuclear Instruments and Methods

Éditeur
Elsevier
Type de publication
journal
Type de document
research-article
Présence de XML structuré
Non
Version de PDF
1.2
Score de qualité du texte
8.956
Nom du concept
  • Landau fluctuations
Catégories Inist
  • 1 - sciences appliquees, technologies et medecines ; 2 - sciences exactes et technologie ; 3 - terre, ocean, espace ; 4 - geophysique externe
Catégories Scopus
  • 1 - Health Sciences ; 2 - Medicine ; 3 - General Medicine
Identifiant ISTEX
C92CC0B55B4B2C8D896DBB3F0F093184CA9F7769
ark:/67375/6H6-7704XFNW-N
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