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Prog. Theor. Phys. Supplement No.140 (2000) pp. 51-67

[ Full Text PDF : FREE ACCESS (255K) ]

Heavy-Ion Resonance and Multi-Cluster Structure of Nuclei

Yukinori Sakuragi

Department of Physics, Osaka City University, Osaka 558-8585, Japan

(Received May 1, 2000)

Abstract:

New kind of heavy-ion resonances recently discovered in nuclear collisions of 12C+12C and 16O+16O systems leading to various multi-cluster exit channels, such as 12C+12C →3α+12C, 3α+3α, 2α+16O and 16O+16O → (α+12C)+16O, (α+12C)+(α+12C), are studied theoretically by the coupled-channel (CC) and coupled-channel Born approximation (CCBA) calculations using microscopic cluster-model wave functions of the colliding nuclei, 12C and 16O, and the nucleus-nucleus interactions based on the realistic G-matrix interaction. These resonance states correspond to highly excited states of the compound systems, 24Mg and 32S nuclei, at excitation energies more than 40∼55 MeV, having the associated multi-cluster structures and large decay widths to these reaction channels. In this talk, we show that characteristic features of these newly-found resonances as well as those of the classical resonances of di-nucleus molecular nature are well reproduced by the microscopic CC and CCBA calculations. The reaction mechanism leading to the formation of these exotic resonances is also discussed in some detail for the 16O+16O → (α+12C)+16O, (α+12C)+(α+12C) and 12C+12C → 8Be+16O reactions.


URL : http://ptp.ipap.jp/link?PTPS/140/51/
DOI : 10.1143/PTPS.140.51

[ Full Text PDF : FREE ACCESS (255K) ] Citation:

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