Contribution of the second kind of meson exchange current to pion-nucleus double-charge-exchange reactions /sup 18/O(. pi. /sup +/,. pi. /sup -/) /sup 18/N/sub e//sub (g. s)/ and /sup 14/C(. pi. /sup +/,. pi. /sup -/)/sup 14/O/sub g. s. /

Journal Article · Fri Jul 01 00:00:00 EDT 1988 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.38.272· OSTI ID:7232123

Zi-qiang, Yu; Chong-hai, Cai; Wei-hsing, Ma; Shu-ping, Zhao

Based on the Lagrangian of Olsson and Turner, contributions of the second kind of meson exchange current to pion-nucleus double-charge-exchange reactions /sup 18/O(..pi../sup +/,..pi../sup -/)/sup 18/N/sub e//sub (g.s))/ and /sup 14/C(..pi../sup +/,..pi../sup -/)/sup 14/O/sub g.s./ have been evaluated. The calculated results show that the second kind of meson exchange current makes the forward theoretical cross section closer to the experimental data but the long-standing puzzling problem of the location of the minimum of the angular distribution at the energy of 164 MeV has not been solved.

• Research Organization: Department of Physics, Nankai University, Tianjin, China
• OSTI ID: 7232123
• Journal Information: Phys. Rev. C; (United States), Vol. 38:1
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CARBON 14 TARGET
PION PLUS REACTIONS
OXYGEN 18 TARGET
CHARGE-EXCHANGE REACTIONS
ANGULAR DISTRIBUTION
BOSON-EXCHANGE MODELS
CROSS SECTIONS
LAGRANGIAN FUNCTION
MEV RANGE 100-1000
PIONS MINUS
S MATRIX
BOSONS
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
FUNCTIONS
HADRON REACTIONS
HADRONS
MATHEMATICAL MODELS
MATRICES
MESON REACTIONS
MESONS
MEV RANGE
NUCLEAR REACTIONS
PARTICLE MODELS
PERIPHERAL MODELS
PION REACTIONS
PIONS
PSEUDOSCALAR MESONS
TARGETS
653003* - Nuclear Theory- Nuclear Reactions & Scattering