Pion double charge exchange to the double dipole resonance

S. Mordechai, N. Auerbach, M. Burlein, H. T. Fortune, S. J. Greene, C. Fred Moore, C. L. Morris, J. M. O'Donnell, M. W. Rawool, J. D. Silk, D. L. Watson, S. H. Yoo, J. D. Zumbro

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62 Scopus citations

Abstract

We report the first observation of a double isovector giant dipole state in nuclei (i.e., an isovector giant dipole resonance built on another giant dipole). Two new resonances were observed in (±+,±-) double charge exchange (at T±=292 MeV) on Snat at excitation energies of 24.7 and 28.7 MeV. The energy centroid is very close to the energy at which the double dipole (J±=0+,2+;T=2) state is expected to appear. The angular distributions for the resonances have a clear quadrupole shape. The measured cross sections and the angular distribution agree well with a simple sequential two-step calculation in which single charge exchange through the giant dipole resonance to the double dipole is evaluated.

Original languageEnglish
Pages (from-to)531-534
Number of pages4
JournalPhysical Review Letters
Volume61
Issue number5
DOIs
StatePublished - 1 Jan 1988

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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