Reaction (. pi. /sup +/,. pi. /sup 0/p) in light nuclei at a meson energy 170 MeV

Journal Article · Wed Mar 01 04:00:00 EST 1978 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:6544383

Berdnikov, Y A; Gismatullin, Y R; Kalimov, A G; Ostroumov, V I

The nuclear emulsion method has been used to study the reaction (..pi../sup +/,..pi../sup 0/p) in the light nuclei C, N, O at an incident-meson energy 170 MeV. We have obtained the integrated cross section for the reaction, the momentum and angular spectra of the recoil nuclei, the angular and energy distributions of the protons, and the differential cross section for scattering of ..pi../sup 0/ mesons. The experimental results are compared with calculations based on the dispersion theory of direct nuclear reactions. It is shown that in the region of small momentum transfers to the residual nucleus, less than 150 MeV/c, the pole mechanism of charge-exchange knockout of a nucleon is dominant. In the region of high momenta an appreciable contribution is made by other mechanisms. An estimate is made of the admixture of the two-stage process and it is shown that the experimental cross-section ratios sigma (..pi../sup +/,..pi../sup +/p)/sigma (..pi../sup -/,..pi../sup -/p), sigma (..pi../sup +/,..pi../sup +/p)/sigma (..pi../sup +/,..pi../sup 0/p), and sigma (..pi../sup +/,..pi../sup 0/p)/sigma (..pi../sup -/,..pi../sup -/p) agree satisfactorily with calculations in the pole approximation if the contribution of other mechanisms is taken into account.

• Research Organization: Leningrad Polytechnic Institute
• OSTI ID: 6544383
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 27:3; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYONS
BOSONS
CARBON
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DIRECT REACTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
ENERGY SPECTRA
FERMIONS
FLUIDS
HADRON REACTIONS
HADRONS
INTEGRAL CROSS SECTIONS
KNOCK-OUT REACTIONS
LINEAR MOMENTUM TRANSFER
MESON REACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
MOMENTUM TRANSFER
NITROGEN
NONMETALS
NUCLEAR EMULSIONS
NUCLEAR REACTIONS
NUCLEONS
OXYGEN
PION PLUS REACTIONS
PION REACTIONS
PIONS
PIONS NEUTRAL
PROTONS
PSEUDOSCALAR MESONS
SPECTRA