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Probing Quasifission In Reactions Forming Rn Nucleus

A. ShamlathBLTP, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna 141980, RussiaE. PrasadN. MadhavanDepartment of Nuclear Physics, Andhra University, Visakhapatnam 530003, IndiaP. V. LaveenInter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, 110067, IndiaJ. GehlotDipartimento MIFT dell' Universit à di Messina, Salita Sperone 31, 98166 Messina, ItalyA. K. NasirovNational University of Uzbekistan, 100174, Tashkent, UzbekistanG. GiardinaDipartimento MIFT dell' Universit à di Messina, Salita Sperone 31, 98166 Messina, ItalyG. MandaglioInstituto Nazionale di Fisica Nucleare, Sezione di Catania, ItalyS. NathDepartment of Nuclear Physics, Andhra University, Visakhapatnam 530003, IndiaTathagata BanerjeeDepartment of Physics Astrophysics, University of Delhi, New Delhi 110007, IndiaA. M. VinodkumarDipartimento ChiBioFarAm dell' Universit à di Messina, Salita Sperone 31, 98166 Messina, ItalyM. ShareefDepartment of Physics, University of Calicut, Calicut 673635, IndiaA. JhinganDepartment of Physics Astrophysics, University of Delhi, New Delhi 110007, IndiaT. VarugheseDipartimento ChiBioFarAm dell' Universit à di Messina, Salita Sperone 31, 98166 Messina, ItalyDvgrks KumarDipartimento MIFT dell' Universit à di Messina, Salita Sperone 31, 98166 Messina, ItalyP. DeviDepartment of Physics Astrophysics, University of Delhi, New Delhi 110007, IndiaMs. KhushbooDepartment of Physics, University of Calicut, Calicut 673635, IndiaP. JishaDepartment of Physics, University of Calicut, Calicut 673635, IndiaNeeraj KumarDepartment of Physics, School of Physical Sciences, Central University of Kerala, Kasaragod 671314, IndiaM. M. HosamaniBLTP, Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna 141980, RussiaS. KailasUM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Mumbai 400098, India

Proceedings of The 26th International Nuclear Physics Conference — PoS(INPC2016)conference2017en

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Litsenziya: cc-by-nc-nd

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Annotatsiya

We studied the competition between fusion and quasifission by populating the compound nucleus (CN) $^{210}$Rn through different entrance channels - $^{16}$O+$^{194}$Pt and $^{30}$Si+$^{180}$Hf, at energies around the Coulomb barrier. The larger widths of the fission fragment mass distribution in the $^{30}$Si+$^{180}$Hf reaction which could not be explained by using transition state models, indicated the onset of quasifission in this reaction. Further, the evaporation residues (ERs) produced in these reactions were measured using the gas-filled recoil mass separator HYRA at IUAC. The measurements showed reduced ER cross sections for the $^{30}$Si+$^{180}$Hf reaction when compared with that of $^{16}$O+$^{194}$Pt at similar excitation energies, confirming the presence of quasifission in the $^{30}$Si+$^{180}$Hf reaction. The experimental results are analysed using the dinuclear system (DNS) and statistical models to understand the possible influence of potential energy surfaces (PES) and different entrance channel conditions in heavy ion fusion reactions.

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Nuclear physics research studies Astronomical and nuclear sciences Atomic and Molecular Physics

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DOI: 10.22323/1.281.0194

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