Nucleon-Nucleon Correlations in the Pionic Double Charge Exchange

  • Heinz Clement
Part of the NATO ASI Series book series (NSSB, volume 359)


Due to its isospin-one nature the pion exists in three charge states π+, π0 and π Hence, pion-induced nuclear reactions may lead to processes, where charges of up to two units are exchanged between pion and nucleus without changing the number of nucleons (N) in the nucleus. Such charge-exchange reactions are known also from light- and heavy-ion reactions, where in particular single-charge-exchange reactions have been studied since a long time. In nucleonic-induced reactions the charge exchange usually takes place by the exchange of nucleons between projectile and target and this process may involve either single nucleons or even clusters of them. Hence, a heavy-ion double-charge exchange reaction, where two units of charge are exchanged between target and projectile, may proceed both via cluster exchange in a single step and in a sequential process via successive exchange of single nucleons. Usually in such reactions at intermediate energies the cross section is found to be dominated by the one-step process.


Charge Exchange Valence Nucleon Single Nucleon Isobaric Analog Pion Energy 
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Copyright information

© Plenum Press, New York 1997

Authors and Affiliations

  • Heinz Clement
    • 1
  1. 1.Physikalisches InstitutUniversität TübingenTübingenGermany

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