Influence of nuclear structure on subbarrier hindrance in Ni + Ni fusion

Feb, 2004

4 pages

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Abstract:

Fusion-evaporation cross sections for

^{64}

Ni+

^{64}

Ni have been measured down to the 10 nb level. For fusion between two open-shell nuclei, this is the first observation of a maximum in the

S

-factor, which signals a strong sub-barrier hindrance. A comparison with the

^{58}

Ni+

^{58}

Ni,

^{58}

Ni+

^{60}

Ni, and

^{58}

Ni+

^{64}

Ni systems indicates a strong dependence of the energy where the hindrance occurs on the stiffness of the interacting nuclei.

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