Giant resonances in single and double charge exchange

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5368029

Mordechai, S ^[1]; Moore, C F ^[2]

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1. Ben-Gurion Univ. of the Negev, Beersheba (Israel) Texas Univ., Austin, TX (United States)
2. Texas Univ., Austin, TX (United States)

A long-standing issue in nuclear physics is whether or not multiple excitations of the giant-dipole resonance do exist. Recent studies at LAMPF using pion-induced double-charge exchange reactions show the existence of previously unobserved giant resonances in the continuum at high-excitation energies. Based on their energies, characteristic angular distributions, and the cross sections at which the resonances are observed, they have been identified as two different types of double-collective-excitation modes of the nucleus: (1) The isovector giant-dipole resonance built on the isobaric analog state and (2) the isovector giant-dipole resonance built on the giant dipole. In this report we will discuss the general features of the new resonances as they have emerged from DCX experiments performed recently at LAMPF. 12 refs., 7 figs.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5368029
• Report Number(s): LA-UR-91-2564; CONF-9106194--2; ON: DE91017822
• Country of Publication: United States
• Language: English

Related Subjects

651000* -- Nuclear Physics
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BOSONS
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
GIANT RESONANCE
HADRON REACTIONS
HADRONS
ISOBARIC ANALOGS
ISOVECTORS
MESON REACTIONS
MESONS
NUCLEAR REACTIONS
PION REACTIONS
PIONS
PSEUDOSCALAR MESONS
RESONANCE
TENSORS
VECTORS