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Determination of Scanning Efficiencies in Experiments Using Nuclear Emulsion Sheets

Abstract

During their exposure, nuclear emulsion sheets detect both tracks from experiment-related particles, as well as a considerable amount of background tracks, mainly due to cosmic rays. Unless the exposure has been fairly short, it is therefore fairly likely that a fraction of the tracks that have been identified as belonging to the particles the experiment is interested in, are really due to background. A method, which allows to measure this fraction reliably directly from the data, is described.Comment: 7 pages, uses elsart, to be published in NIMA 450, p 44

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