Giant dipole resonances built on isobaric analog states in pion double charge exchange
Giant resonances were observed in (..pi../sup +/,..pi../sup -/) double charge exchange (at T/sub ..pi../ = 292 MeV) on /sup 56/Fe, /sup 80/Se, and /sup 208/Pb at excitation energies of 28.5, 34.6, and 43.6 MeV, respectively. An angular distribution for /sup 56/Fe was measured and observed to have a dipole shape. The variation of excitation energy above the double isobaric analog state is consistent with an A/sup -1/3/ dependence, as expected for giant dipole resonances built on the isobaric analog states. The /sup 56/Fe angular distribution agrees well with a coupled-channels impulse-approximation calculation in which sequential single charge exchange through the isobaric analog to the giant dipole resonance is evaluated.
- Research Organization:
- Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
- OSTI ID:
- 5670514
- Journal Information:
- Phys. Rev. Lett.; (United States), Vol. 60:5
- Country of Publication:
- United States
- Language:
- English
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IRON 56 TARGET
PION PLUS REACTIONS
LEAD 208 TARGET
CHARGE EXCHANGE
RESONANCE SCATTERING
SELENIUM 80 TARGET
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EXPERIMENTAL DATA
GIANT RESONANCE
ISOBARIC ANALOGS
MEV RANGE 100-1000
PIONS MINUS
BOSONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
HADRON REACTIONS
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INELASTIC SCATTERING
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MESON REACTIONS
MESONS
MEV RANGE
NUCLEAR REACTIONS
NUMERICAL DATA
PION REACTIONS
PIONS
PSEUDOSCALAR MESONS
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