Pion double-charge exchange on O16 and O18

R. L. Burman, M. P. Baker, M. D. Cooper, R. H. Heffner, D. M. Lee, R. P. Redwine, J. E. Spencer, T. Marks, D. J. Malbrough, B. M. Preedom, R. J. Holt, and B. Zeidman
Phys. Rev. C 17, 1774 – Published 1 May 1978
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Abstract

The zero-degree differential cross section for pion double-charge exchange on O18(π+,π+)Ne18 was measured at three incident pion energies and found to be 2.00±0.34, 2.19±0.44, and 1.67±0.38 μb/sr at 139, 126, and 95 MeV, respectively. A similar measurement for O16 at an energy of 145 MeV resulted in a value of 0.87 ± 0.21 μb/sr. The ratio of the ground-state transitions near 140 MeV is σ(O18)σ(O16)=2.3±0.7. The mass excess determined for Ne16 is 24.4 ± 0.5 MeV. The experimental setup and data analysis are discussed in detail. Results are compared with various calculations and discussed from the standpoint of their implications for learning about reaction dynamics and nuclear structure. The reaction appears to be quite sensitive to ground-state correlations of the target.

NUCLEAR REACTIONS O18(π+,π), E=95139 MeV; measured σ(E,θ=0°). O16(π+,π), E=145 MeV; measured σ(θ=0°), deduced ΔM(Ne16).

  • Received 31 October 1977

DOI:https://doi.org/10.1103/PhysRevC.17.1774

©1978 American Physical Society

Authors & Affiliations

R. L. Burman, M. P. Baker, M. D. Cooper, R. H. Heffner, D. M. Lee, R. P. Redwine, and J. E. Spencer

  • Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545

T. Marks, D. J. Malbrough, and B. M. Preedom

  • University of South Carolina, Columbia, South Carolina 29208

R. J. Holt and B. Zeidman

  • Argonne National Laboratory, Argonne, Illinois 60439

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Vol. 17, Iss. 5 — May 1978

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