The role of Fission in the search of the Super Heavy Land: Fission modes in heavy and superheavy nuclei. Case study of 180Hg

E. Vardaci; A. Di Nitto; T. Banerjee; A. Pulcini; P.A. Setaro; G. Alifano; G. La Rana; N. Carjan; A. Cicchella; S. Spinosa; E.M. Kozulin; W.H. Trzaska; I.M. Itkis; G.N. Knyazheva; D. Kumar; K.V. Novikov; I.V. Vorobiev; S.V. Khlebnikov; M. Cheralu; N.I. Kozulina; I.V. Pchelintsev; C. Borcea; S. Calinescu; D.M. Filipescu; I.M. Harca; C. Petrone

doi:10.1051/epjconf/202430401003

All issues

Volume 304 (2024)

EPJ Web Conf., 304 (2024) 01003

Abstract

Open Access

Issue		EPJ Web Conf. Volume 304, 2024 HINPw7 – 7^th International Workshop of the Hellenic Institute of Nuclear Physics on Nuclear Structure, Astrophysics and Reaction Dynamics


Article Number		01003
Number of page(s)		5
Section		Reaction Dynamics
DOI		https://doi.org/10.1051/epjconf/202430401003
Published online		08 October 2024

EPJ Web of Conferences 304, 01003 (2024)
https://doi.org/10.1051/epjconf/202430401003

The role of Fission in the search of the Super Heavy Land: Fission modes in heavy and superheavy nuclei. Case study of ¹⁸⁰Hg

E. Vardaci¹^,2^*, A. Di Nitto¹^,2, T. Banerjee¹^,2, A. Pulcini¹^,2, P.A. Setaro¹^,2, G. Alifano¹^,2, G. La Rana¹^,2, N. Carjan³^,6, A. Cicchella¹^,2, S. Spinosa¹^,2, E.M. Kozulin³, W.H. Trzaska⁴, I.M. Itkis³, G.N. Knyazheva³, D. Kumar³, K.V. Novikov³, I.V. Vorobiev³, S.V. Khlebnikov⁵, M. Cheralu³, N.I. Kozulina³, I.V. Pchelintsev³, C. Borcea⁶, S. Calinescu⁶, D.M. Filipescu⁶, I.M. Harca⁶ and C. Petrone⁶

¹ Dipartimento di Fisica, Università degli Studi di Napoli “Federico II”, Napoli, Italy
² Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy
³ Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Russia
⁴ Accelerator Laboratory of University of Jyväskylä, Jyväskylä, Finland
⁵ Khlopin Radium Institute, St.Petersburg, Russia
⁶ IFIN-HH, Bucharest Magurele, Romania

^* e-mail: vardaci@na.infn.it

Published online: 8 October 2024

Abstract

Many observations strongly support the hypothesis that nuclei may fission through several independent fission modes (multimodal fission) interpreted as different prescission shapes and fission paths in a multidimensional potential energy landscape where shell effects are dominant. Mass distributions of the fission fragments are sensitive to the potential energy landscape and appear to be single humped (symmetric) or double humped (asymmetric). In many cases a mixture of both modes is observed.

We propose here our study on ¹⁸⁰Hg. Binary fission fragments formed in the reaction ⁶⁸Zn + ¹¹²Sn → ¹⁸⁰Hg at different excitation energies around the Coulomb barrier were detected using the double-arm time-of-flight technique with the spectrometers CORSET. The experiment was performed at JYFL (Jyvaskyla, Finland). We will discuss an analysis of the mass distributions in terms of fission modes predicted by a five-dimensional fission model. We have found out that the mass distributions can be well reproduced by considering a symmetric fission mode and two asymmetric modes at (A_L ≈ 80, A_H ≈ 100) and (A_L ≈ 70 and A_H ≈ 110).

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