Giant dipole resonances built on isobaric analog states in pion double charge exchange

S. Mordechai, N. Auerbach, G. R. Burleson, K. S. Dhuga, M. Dwyer, J. A. Faucett, H. T. Fortune, R. Gilman, S. J. Greene, C. Laymon, C. Fred Moore, C. L. Morris, D. S. Oakley, M. A. Plum, S. J. Seestrom-Morris, Peter A. Seidl, M. J. Smithson, Z. F. Wang, J. D. Zumbro

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


Giant resonances were observed in (+,-) double charge exchange (at T=292 MeV) on Fe56, Se80, and Pb208 at excitation energies of 28.5, 34.6, and 43.6 MeV, respectively. An angular distribution for Fe56 was measured and observed to have a dipole shape. The variation of excitation energy above the double isobaric analog state is consistent with an A-1/3 dependence, as expected for giant dipole resonances built on the isobaric analog states. The Fe56 angular distribution agrees well with a coupled-channels impulse-approximation calculation in which sequential single charge exchange through the isobaric analog to the giant dipole resonance is evaluated.

Original languageEnglish
Pages (from-to)408-411
Number of pages4
JournalPhysical Review Letters
Issue number5
StatePublished - 1 Jan 1988

ASJC Scopus subject areas

  • Physics and Astronomy (all)


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