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MOLECULAR RESONANCES AND THE JACOBI SHAPE TRANSITION: THE CASE OF $^{24}$Mg+$^{24}$Mg AND $^{48}$Cr

Abstract : fast rotating 48Cr is predicted to be highly prolate and deformed after a Jacobi shape transition and just before fission. In this article, it is proposed that a narrow and high spin 24Mg+24Mg resonance corresponds to the formation of this exotic 48Cr. Moreover the 24Mg+24Mg reaction has been studied at the Legnaro Tandem at a CM bombarding energy of 45.7 MeV, where a narrow and high spin resonance has been reported previously. To establish the connection between the resonance and a molecular state of 48Cr, the decay of the resonance into the inelastic and fusion-evaporation channels has been investigated. The ON and OFF resonance decay yields have been measured using, for the inelastic channels, the fragment spectrometer PRISMA and the γ array CLARA, and, for the fusion-evaporation channels, the Si array EUCLIDES and the γ array GASP. Strong resonant effects have been observed in the inelastic channels involving the 2+ and 4+ states of the 24Mg ground state (g.s.) band. Weaker effects are also seen in certain fusion-evaporation channels. Both results will be discussed here.
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http://hal.in2p3.fr/in2p3-00353273
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Submitted on : Thursday, January 15, 2009 - 11:31:17 AM
Last modification on : Friday, May 8, 2020 - 1:10:10 AM

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M.-D. Salsac, F. Haas. MOLECULAR RESONANCES AND THE JACOBI SHAPE TRANSITION: THE CASE OF $^{24}$Mg+$^{24}$Mg AND $^{48}$Cr. THE WORKSHOP ON THE STATE OF THE ART IN NUCLEAR CLUSTER PHYSICS (SOTANCP2008), May 2008, Strasbourg, France. pp.2029 - 2033, ⟨10.1142/S0218301308011033⟩. ⟨in2p3-00353273⟩

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