Excitation of isovector giant resonances in pion single-charge exchange at 120, 165, and 230 MeV

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

DOI:https://doi.org/10.1103/PhysRevC.34.2231· OSTI ID:6895326

Irom, F; Bowman, J D; Bolme, G O; Piasetzky, E; Sennhauser, U; Alster, J; Lichtenstadt, J; Moinester, M; Knudson, J N; Rokni, S H

We have measured doubly differential cross sections for the (..pi../sup +/,..pi../sup 0/) and (..pi../sup -/,..pi../sup 0/) reactions at 120- and 230-MeV kinetic energies for /sup 40/Ca, /sup 60/Ni, and /sup 120/Sn. Nuclear-excitation energies up to 60 MeV were observed. We have extracted excitation energies, widths, and maximum cross sections for the isospin components of the isovector monopole resonance and the isovector dipole resonance. The excitation energies and widths from the present data and from earlier measurements at 165 MeV are compared and found to be in agreement. The cross sections for the isovector monopole and isovector dipole resonances show the same increase with bombarding energy in all targets. No isovector quadrupole strength is required to fit the experimental data. We compare the energy dependences of the isovector-resonance cross sections with those of isobaric-analog states, and to distorted-wave impulse approximation calculations.

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 6895326
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 34:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651520* -- Nuclear Properties & Reactions
A=39-58
Experimental
651620 -- Nuclear Properties & Reactions
A=59-89
Experimental
651720 -- Nuclear Properties & Reactions
A=90-149
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOSONS
CALCIUM 40 TARGET
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY LEVELS
ENERGY RANGE
GIANT RESONANCE
HADRON REACTIONS
HADRONS
IMPULSE APPROXIMATION
ISOBARIC ANALOGS
ISOSPIN
MESON REACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
MONTE CARLO METHOD
NICKEL 60 TARGET
NUCLEAR REACTIONS
PARTICLE PROPERTIES
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
RESONANCE
TARGETS
TIN 120 TARGET