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A. Doron; J. Alster; A. Erell; S. Gilad; M. A. Moinester; R. A. Anderson; H. W. Baer; J. D. Bowman; M. D. Cooper; F. H. Cverna; C. M. Hoffman; N. S. P. King; M. J. Leitch; J. P. Piffaretti; P. R. Bevington; E. Winkelmann; C. D. Goodman

doi:10.1103/PhysRevLett.48.989

Energy Dependence of the Small-Angle Differential Cross Sections to Isobaric Analog States in ${}^{7}{Li} (π^{+}, π^{0}) {}^{7}{Be}$ and ${}^{13}C (π^{+}, π^{0}) {}^{13}N$

A. Doron, J. Alster, A. Erell, S. Gilad, M. A. Moinester, R. A. Anderson, H. W. Baer, J. D. Bowman, M. D. Cooper, F. H. Cverna, C. M. Hoffman, N. S. P. King, M. J. Leitch, J. P. Piffaretti, P. R. Bevington, E. Winkelmann, and C. D. Goodman

Phys. Rev. Lett. 48, 989 – Published 12 April 1982

Abstract

The forward-angle differential cross sections of pion single charge exchange on ${}^{7}{Li}$ and ${}^{13}C$ were measured at 70, 100, 150, 165, and 180 MeV. The cross sections rise steeply up to 150 MeV and remain almost constant between 150 and 180 MeV. Comparisons with theoretical calculations and with the free charge-exchange cross sections are presented. There is poor agreement with the data. Only phenomenological calculations can fit the resonance region. The isobaric analog excitation functions rise more steeply than the continuum single-charge-exchange cross sections.

Received 16 September 1981

DOI:https://doi.org/10.1103/PhysRevLett.48.989

Authors & Affiliations

A. Doron, J. Alster, A. Erell, S. Gilad^*, and M. A. Moinester

Department of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel

R. A. Anderson, H. W. Baer, J. D. Bowman, M. D. Cooper, F. H. Cverna, C. M. Hoffman, N. S. P. King, M. J. Leitch, and J. P. Piffaretti^†

Clinton P. Anderson Meson Physics Facility, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

P. R. Bevington^‡ and E. Winkelmann^§

Physics Department, Case Western Reserve University, Cleveland, Ohio 44106

C. D. Goodman

Indiana University Cyclotron Facility, Bloomington, Indiana 47401

^*Present address: Israel Aircraft Industry, Israel.
^†Permanent address: Institut de Physique, Université de Neuchatel, CH-2000 Neuchatel, Switzerland.
^‡Deceased.
^§Present address: Contraves AG, Zurich, Switzerland.