Energy dependence of double giant resonances in pion double charge exchange

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Bulletin of the American Physical Society

OSTI ID:243616

Moore, C F; Johnson, K; Johnson, J ^[1]

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1. and others

The energy dependence of the giant dipole resonance built on the isobaric analog state was measured in pion-induced double charge exchange on {sup 13}C at incident pion energies of 140-295 MeV. The cross-section increases with energy. The excitation function has a typical non-spin-flip signature, expected from simple considerations and verified by sequential model calculation. The results indicate that the pion DCX reaction excites this resonance predominantly via a two-step sequential process. Three narrower low-lying states in {sup 13}O (E{sub x}=2.9, 4.3 and 5.9 MeV) exhibit a clear spin=flip signature and most likely correspond to the giant Gamow-Teller strength built on the isobaric analog state. The authors will discuss the new results from LAMPF and the general features of these exotic nuclear states.

• OSTI ID: 243616
• Report Number(s): CONF-9304297--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 38; ISSN 0003-0503; ISSN BAPSA6
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CARBON 13 TARGET
CHARGE EXCHANGE
CROSS SECTIONS
ENERGY DEPENDENCE
GIANT RESONANCE
ISOBARIC ANALOGS
MEV RANGE 100-1000
PION REACTIONS