Interaction of positive and negative pions with Al27 and Si28

D. Ashery*, M. Zaider, Y. Shamai, S. Cochavi, M. A. Moinester, A. I. Yavin, J. Alster

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The interaction of low-energy positive and negative pions with Al27 and Si28 was studied by the detection of γ radiation emitted from residual nuclei formed in the reaction. Large cross sections for the removal of α clusters were found for both nuclei and both pion charges. A large asymmetry is observed between the cross sections for the (π-,π-p) and (π+,π+n) on Si28 leading to mirror states in Al27 and Si27. The ratio of π+ to π- cross sections for proton knockout is about a third of the value predicted by a simple impulse approximation.

Original languageEnglish
Pages (from-to)943-946
Number of pages4
JournalPhysical Review Letters
Volume32
Issue number17
DOIs
StatePublished - 1974

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