Pion absorption on nuclei at 65 MeV

Journal Article · Sat Mar 01 04:00:00 EST 1986 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.33.1002· OSTI ID:6093447

Nakayama, K; Yokota, H; Ichimaru, K; Takahata, Y; Suekane, F; Chiba, R; Nakai, K; Arai, I; En'yo, H; Sasaki, S

Proton-proton and proton-neutron angular correlations as well as proton and deuteron inclusive spectra from pion absorption on C, Al, Cu, and Ta were measured at T/sub ..pi../ = 65 MeV. We compared the results with the prediction of the intranuclear cascade model, assuming that pion absorption proceeds only through two-nucleon absorption processes. The differential cross sections of the (..pi../sup +/,p) and (..pi../sup +/,pp) reactions were fairly well reproduced by the calculation in a wide angular range. Ratios R of the pion absorption cross section on a pn pair to that on a pp or nn pair, were in agreement between the inclusive and exclusive measurements for C and Al, but for Cu, the inclusive measurement gave a smaller R value. The internuclear cascade calculations for the (..pi../sup + -/,pn) and (..pi../sup -/,pp) reactions revealed the importance of the pion charge exchange process before absorption, even at T/sub ..pi../ = 65 MeV.

• Research Organization: Department of Physics, Tokyo Institute of Technology, Ohokayama, Meguro-ku, Tokyo, Japan
• OSTI ID: 6093447
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 33:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM
ANGULAR CORRELATION
ANGULAR MOMENTUM
BARYONS
CAPTURE
CARBON
CHARGE-EXCHANGE REACTIONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COPPER
CORRELATIONS
COULOMB FIELD
CROSS SECTIONS
DEUTERONS
DIFFERENTIAL CROSS SECTIONS
ELECTRIC FIELDS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EXCLUSIVE INTERACTIONS
FERMIONS
HADRON REACTIONS
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
ISOSPIN
MESON REACTIONS
METALS
MEV RANGE
MEV RANGE 10-100
NEUTRONS
NONMETALS
NUCLEAR CASCADES
NUCLEAR REACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
PROTONS
SPIN
TANTALUM
TRANSITION ELEMENTS