Properties of the giant dipole resonance built on the isobaric analog state

Journal Article · Tue Aug 01 00:00:00 EDT 1989 · Physical Review (Section) C: Nuclear Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevC.40.850· OSTI ID:5665835

Mordechai, S ^[1]; Auerbach, N ^[1]; Greene, S ^[1]; Morris, C L ^[2]; O'Donnell, J M ^[2]; Fortune, H T ^[2]; Liu, G ^[2]; Burlein, M ^[2]; Wuosmaa, A ^[3]; Yoo, S H ^[3]; others, and

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1. Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel (IL) University of Texas at Austin, Austin, Texas 78712
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545
3. University of Pennsylvania, Philadelphia, Pennsylvania 19104

Resonances were observed in pion-induced double charge exchange (at {ital T}{sub {pi}}=292 MeV) on {sup 13}C, {sup 59}Co, {sup 93}Nb, {sup 138}Ba, and {sup 197}Au in the continuum at excitation energies of 8.4, 27.5, 33.2, 38.7, and 44.2 MeV, respectively ({ital Q}={minus}27.4, {minus}32.3, {minus}35.8, {minus}38.4, and {minus}46.0 MeV). An angular distribution was measured for the resonance on {sup 93}Nb and observed to have a dipole shape. The measured cross sections and the angular distribution agree well with a simple sequential two-step calculation in which the intermediate states arise from single charge exchange to the isobaric analog state and to the giant dipole resonance. Based on their excitation energies, angular distribution for {sup 93}Nb, and cross sections we identify the resonances as the giant dipoles built on the isobaric analog states. The new data together with the recent observation of the resonance in three other nuclei indicate that the excitation energies, widths, and cross sections for these resonances have a simple mass dependence.

• OSTI ID: 5665835
• Journal Information: Physical Review (Section) C: Nuclear Physics; (USA), Vol. 40:2; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARIUM 138 TARGET
PION REACTIONS
CARBON 13 TARGET
COBALT 59 TARGET
GOLD 197 TARGET
NIOBIUM 93 TARGET
CHARGE-EXCHANGE REACTIONS
ANGULAR DISTRIBUTION
CROSS SECTIONS
DIPOLE MOMENTS
EXPERIMENTAL DATA
GIANT RESONANCE
ISOBARIC ANALOGS
LAMPF LINAC
MEV RANGE 100-1000
PHASE SHIFT
Q-VALUE
ACCELERATORS
CHARGED-PARTICLE REACTIONS
DATA
DISTRIBUTION
ENERGY
ENERGY LEVELS
ENERGY RANGE
HADRON REACTIONS
INFORMATION
LINEAR ACCELERATORS
MESON FACTORIES
MESON REACTIONS
MEV RANGE
NUCLEAR REACTIONS
NUMERICAL DATA
RESONANCE
TARGETS
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