Double giant dipole resonance in the (. pi. sup minus ,. pi. sup + ) reaction

Journal Article · Mon Jun 01 04:00:00 EDT 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.45.2723· OSTI ID:7105714

Ward, H; Johnson, K; Kahrimanis, G; Saunders, D; Moore, C F ^[1]; Mordechai, S ^[2]; Morris, C L ^[3]; Fortune, H T; Kagarlis, M A; Smith, D A; O'Donnell, J M ^[4]; Auerbach, N ^[5]

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

The double isovector giant dipole state has been observed in the ({pi}{sup {minus}},{pi}{sup +}){Delta}{ital T}{sub {ital x}}=+2 double-charge-exchange reaction on {sup 13}C, {sup 27}Al, {sup 40}Ca, {sup 56}Fe, {sup 59}Co, and {sup 93}Nb. The resonances observed in the ({pi}{sup {minus}},{pi}{sup +}) reaction are closely related via Coulomb displacement energy and isospin symmetry to the resonances measured in the inverse ({pi}{sup +},{pi}{sup {minus}}) reaction on the same nuclei. The new observations provide a direct determination of the upper isospin component of the double giant dipole state, which is generally very weak in the ({pi}{sup +},{pi}{sup {minus}}) reaction. The comparison between the double dipole in the two double-charge-exchange modes gives valuable information on the isospin splitting and the Pauli-blocking effects for isotensor transitions.

• OSTI ID: 7105714
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 45:6; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
GIANT RESONANCE
HADRON REACTIONS
ISOSPIN
MESON REACTIONS
NUCLEAR REACTIONS
PARTICLE PROPERTIES
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
RESONANCE
TARGETS