Measurement of. pi. /sup +//. pi. /sup -/ cross section ratio for the giant quadrupole resonance in /sup 208/Pb

Journal Article · Thu May 01 04:00:00 EDT 1986 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.33.1847· OSTI ID:5871948

Seestrom-Morris, S J; Morris, C L; Moss, J M; Carey, T A; Drake, D; Dousse, J H; Bland, L C; Adams, G S

Cross sections have been measured for ..pi../sup +/ and ..pi../sup -/ scattering to the giant resonance region of /sup 208/Pb with 162-MeV pions. The value of R = sigma(..pi../sup -/)/sigma(..pi../sup +/) measured for the giant quadrupole resonance is 2.72. A distorted wave impulse approximation analysis of these data using collective model form factors gives the ratio of neutron to proton matrix elements to be 3.8. This is much larger than expected from the hydrodynamical model which predicts a value of N/Z of 1.54.

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545; University of Minnesota, Minneapolis, Minnesota 55455
• OSTI ID: 5871948
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 33:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651925* -- Nuclear Properties & Reactions
A=190-219
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DISTORTED WAVE THEORY
DISTRIBUTION
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GIANT RESONANCE
HADRON REACTIONS
HEAVY NUCLEI
HYDRODYNAMIC MODEL
IMPULSE APPROXIMATION
INFORMATION
ISOTOPES
LEAD 208
LEAD 208 TARGET
LEAD ISOTOPES
MATHEMATICAL MODELS
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PARTICLE MODELS
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
RESONANCE
SCATTERING
STABLE ISOTOPES
STATISTICAL MODELS
TARGETS
THERMODYNAMIC MODEL