(. pi. ,. pi. N) reactions in /sup 48/Ca

Journal Article · Fri Feb 01 04:00:00 EST 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.31.510· OSTI ID:6159654

Ohkubo, Y; Orth, C J; Vieira, D J; Liu, L C

Excitation functions for the formation of /sup 47/Ca and /sup 47/K from /sup 48/Ca with 100-, 180-, and 300-MeV ..pi../sup + -/ have been determined by activation methods. The contributions of both quasifree and nonquasifree processes are observed in the excitation functions. Unlike (..pi..,..pi..N) reactions on /sup 12/C, final-state nucleon charge exchange is found to play only a minor role in /sup 48/Ca. This decreasing importance of nucleon charge exchange with increasing nuclear mass is explained by a newly-developed (..pi..,..pi..N) theory. In order to establish the magnitude of nucleon charge exchange in medium-mass nuclei, we have measured the cross section for the reaction /sup 45/Sc(..pi../sup -/,..pi..N)/sup 44/K at 180 MeV. An upper limit of 0.25 mb has been determined.

• Research Organization: Isotope and Nuclear Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 6159654
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 31:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651525* -- Nuclear Properties & Reactions
A=39-58
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 48 TARGET
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIRECT REACTIONS
ENERGY RANGE
EXCITATION FUNCTIONS
FUNCTIONS
HADRON REACTIONS
KNOCK-OUT REACTIONS
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
QUASI-FREE REACTIONS
SCANDIUM 45 TARGET
TARGETS