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Measurements on isovector giant resonances in pion charge exchange

Journal Article · · Phys. Rev. C; (United States)
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We measured the energies, widths, and cross sections of the isovector monopole and dipole resonances in various nuclei between /sup 40/Ca and /sup 208/Pb with the reactions (..pi../sup +- /,..pi../sup 0/). Both resonances exhaust approximately the same substantial fraction of the cross section calculated in a random-phase-approximation--distorted-wave-impulse-approximation model. The excitation energies and widths of the monopole and dipole are in good agreement with random-phase-approximation calculations and for the dipole they are also in agreement with other data. No isovector quadrupole resonance was observed, and the upper limits for the cross sections for the light elements are well below the sum rule strength for the isovector monopole and giant dipole resonance.
Research Organization:
School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel
OSTI ID:
7244004
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 34:5; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
BOSONS
CALCIUM 40
CALCIUM 40 TARGET
CALCIUM ISOTOPES
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIPOLE MOMENTS
DISTORTED WAVE THEORY
ELEMENTARY PARTICLES
EQUATIONS
EVEN-EVEN NUCLEI
GIANT RESONANCE
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
IMPULSE APPROXIMATION
ISOSPIN
ISOTOPES
LEAD 208
LEAD 208 TARGET
LEAD ISOTOPES
LIGHT NUCLEI
MESON REACTIONS
MESONS
MONOPOLES
NUCLEAR REACTIONS
NUCLEI
PARTICLE PROPERTIES
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
RANDOM PHASE APPROXIMATION
RESONANCE
STABLE ISOTOPES
SUM RULES
TARGETS