Pion double charge exchange and inelastic scattering on {sup 3}He
- Department of Physics and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Department of Physics, University of Wyoming, Laramie, Wyoming 82071 (United States)
Measurements were made of the doubly differential cross sections for three inclusive pion reactions on {sup 3}He: {pi}{sup {minus}} double charge exchange (DCX), and {pi}{sup +} and {pi}{sup {minus}} inelastic scattering. The cross sections for DCX were measured at incident pion energies of 120, 180, and 240 MeV, and at angles of 25{degree}, 50{degree}, 80{degree}, 105{degree}, and 130{degree}, while inelastic scattering cross sections were measured at 120, 180, and 240 MeV and scattering angles of 50{degree}, 80{degree}, 105{degree}, and 130{degree}. In each case the outgoing pion energy spectra were measured from 10 MeV up to the kinematic limit. The DCX spectra exhibit a double-peaked structure at forward angles that can be understood as a consequence of a sequential single charge exchange mechanism. Model calculations based on this mechanism are in rough agreement with the measured spectra. The doubly differential cross sections measured for the inelastic scattering reactions exhibit a prominent quasielastic peak. A distorted-wave impulse-approximation calculation of the quasielastic cross sections has been performed and a comparison made with the measurements. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 544254
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 55; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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