Elsevier

Nuclear Physics B

Volume 102, Issue 3, 19 January 1976, Pages 429-438
Nuclear Physics B

Experimental test for the ΔI ⩽ 1 (isospin) rule in electromagnetic transitions

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Abstract

At the Bonn 500 MeV synchrotron the differential cross sections for the photoproduction of neutral pions on protons and neutrons have been measured in a single experiment using a target of liquid deuterium. The final state has been completely determined by measuring the outgoing pion and one nucleon in coincidence. Measurements of the ratio R = π0n/π0p have been done at different angles and energies. The possible existence of an isotensor contribution has been limited to (−2 ± 3)% of the isovector amplitude.

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Cited by (2)

  • Twenty-five years experience with Cherenkov detectors in Bonn

    1986, Nuclear Inst. and Methods in Physics Research, A

The authors would like to thank P. Haas, J. Karthaus and K. Küffner for operating the synchrotron. The assistance of Dr. Hahn for the preparation of the neutron counter efficiency measurements is gratefully acknowledged. This work has been supported by the German Bundesministerium für Forschung und Technologie, Bonn.

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