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Role of deformed shell effects on the mass asymmetry in nuclear fission of mercury isotopes

Abstract : Until now, the mass asymmetry in the nuclear fission process has been understood in terms of the strong influence of the nuclear structure of the nascent fragments. Recently, a surprising asymmetric fission has been discovered in the light mercury region and has been interpreted as the result of the influence of the nuclear structure of the parent nucleus, totally discarding the influence of the fragments' structure. To assess the role of the fragment shell effects in the mass asymmetry in this particular region, a scission-point model, based on a full energy balance between the two nascent fragments, has been developed using one of the best theoretical descriptions of microscopic nuclear structure. As for actinides, this approach shows that the asymmetric splitting of the 180Hg nucleus and the symmetric one of 198Hg can be understood on the basis of only the microscopic nuclear structure of the fragments at scission.
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https://hal.archives-ouvertes.fr/hal-01119386
Contributor : Valerie Poyeton Connect in order to contact the contributor
Submitted on : Monday, February 23, 2015 - 10:19:31 AM
Last modification on : Monday, December 13, 2021 - 9:14:53 AM

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Stefano Panebianco, Jean-Luc Sida, Héloise Goutte, Jean-François Lemaître, Noël Dubray, et al.. Role of deformed shell effects on the mass asymmetry in nuclear fission of mercury isotopes. Physical Review C, 2012, 86 (6), pp.064601. ⟨10.1103/PhysRevC.86.064601⟩. ⟨hal-01119386⟩

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