Elsevier

Physics Letters B

Volume 115, Issue 6, 23 September 1982, Pages 445-449
Physics Letters B

Measurement of the total and partial K-X-ray yields for the pnn- and dn-reaction channels of the π-absorption in 3He

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Abstract

The total K-X-ray yield YK in pionic 3He has been determined to (27 ± 7)% by measuring a ratio of 3.44 ± 0.29 for the simultaneously detected numbers of K-X-rays and deuterons emitted after pion absorption. Partial K-X-ray yields YKd and YKp corresponding to the dn- and pnn-absorption channels, respectively, have been measured by detecting coincidences between K-X-rays and deuterons or protons above 20 MeV, respectively resulting in YKd=(49 ± 5)% and YKp (Tp⩾20 MeV) = (29 ± 4)%.

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The work was supported in part by the Swiss National Science Foundation and the German Bundesministerium für Forschung und Technologie.

It is a pleasure to thank H. Krause and M. Dröge for technical assistance and to acknowledge the support of the cyclotron group and the technical staff of SIN.

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