Selection of Events in the Absorption Reactions of π–-Meson Nuclei

A description of a procedure for selecting events during the absorption of stopped pions in thin targets is presented. This approach is based on the use of two monitor Si-detectors and a “live” target, which is also an Si-detector, as the last layers of the moderator. Setting the thresholds on monit...

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Bibliographic Details
Published in:Instruments and experimental techniques (New York) 2021-07, Vol.64 (4), p.516-519
Main Authors: Gurov, Yu. B., Lapushkin, S. V., Rozov, S. V., Sandukovsky, V. G., Chernyshev, B. A.
Format: Article
Language:English
Subjects:
Absorption
Detectors
Electrical Engineering
Measurement Science and Instrumentation
Mesons
Nuclear Experiment Technique
Physical Chemistry
Physics
Physics and Astronomy
Pions
Target thickness
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Summary:A description of a procedure for selecting events during the absorption of stopped pions in thin targets is presented. This approach is based on the use of two monitor Si-detectors and a “live” target, which is also an Si-detector, as the last layers of the moderator. Setting the thresholds on monitor detectors and analyzing signals from a “live” target allow one to select pions with a residual range corresponding to the target thickness and reliably exclude the background from stops in the monitor system. It is shown that this method provides an efficiency of identifying stopped π – -mesons of 90%.
ISSN:0020-4412
1608-3180
DOI:10.1134/S0020441221040163