Measurements of pion single charge exchange cross sections in deuterium

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Bulletin of the American Physical Society

OSTI ID:374777

Matthews, J L; Park, H T; Pate, S F ^[1]

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1. and others

Cross sections for the d({pi}{sup {minus}},{pi}{sup 0})nn reaction at incident pion energies of 164, 263, and 371 MeV have been measured. One crate of the LAMPF Neutral Meson Spectrometer, composed of 60 CsI crystals, was used to detect both photons from the {pi}{sup 0} decay. The acceptance of the detector was obtained by comparing measured p({pi}{sup {minus}}, {pi}{sup 0})n yields to the known cross sections. No previous measurement of single charge exchange cross sections for deuterim exists between 164 MeV and 500 MeV. An impulse approximation calcuation including a realistic nucleon momentum distribution describes the energy spectra in the doubly differential cross section well. The low energy tail deviating from the calculation can be attributed to multiple-scattering effects. A Faddeev calculation at 164 MeV incorporating Pauli-blocking and multiple-scattering agrees well with the measured angular distribution. At the two higher energies the d({pi}{sup {minus}},{pi}{sup 0})nn differential cross section is essentially identical to that for p({pi}{sup {minus}},{pi}{sup 0})n, except at forward angles where the former is suppressed by the Pauli principle.

• OSTI ID: 374777
• Report Number(s): CONF-9304297--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 40; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHARGE EXCHANGE
CROSS SECTIONS
DEUTERIUM TARGET
MEV RANGE 100-1000
PION MINUS REACTIONS
PIONS NEUTRAL
PROTONS