Pion double charge exchange to the double dipole resonance

Journal Article · Mon Aug 01 04:00:00 EDT 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.61.531· OSTI ID:6853415

Mordechai, S; Auerbach, N; Burlein, M; Fortune, H T; Greene, S J; Moore, C F; Morris, C L; O'Donnell, J M; Rawool, M W; Silk, J D; others, and

We report the first observation of a double isovector giant dipole state in nuclei (i.e., an isovector giant dipole resonance built on another giant dipole). Two new resonances were observed in (..pi../sup +/,..pi../sup -/) double charge exchange (at T/sub ..pi../ = 292 MeV) on /sup nat/S at excitation energies of 24.7 and 28.7 MeV. The energy centroid is very close to the energy at which the double-dipole (J/sup ..pi../ = 0/sup +/,2/sup +/;T = 2) state is expected to appear. An angular distribution was measured for the resonances and observed to have a clear quadrupole shape. The measured cross sections and the angular distribution agree well with a simple sequential two-step calculation in which single charge exchange through the giant dipole resonance to the double dipole is evaluated.

• Research Organization: Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
• OSTI ID: 6853415
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:5; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

651420* -- Nuclear Properties & Reactions
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
COMPUTER CALCULATIONS
COUPLED CHANNEL THEORY
CROSS SECTIONS
DEFORMATION
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ENERGY RANGE
GIANT RESONANCE
HADRON REACTIONS
ISOVECTORS
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR DEFORMATION
NUCLEAR QUADRUPOLE RESONANCE
NUCLEAR REACTIONS
PION PLUS REACTIONS
PION REACTIONS
RESONANCE
SULFUR 32 TARGET
TARGETS
TENSORS
VECTORS