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Nuclear structure dependence of fusion hindrance in heavy element synthesis

J. KhuyagbaatarGSI Helmholtzzentrum für Schwerionenforschung, 64291, Darmstadt, GermanyH. M. DavidGSI Helmholtzzentrum für Schwerionenforschung, 64291, Darmstadt, GermanyD. J. HindeDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaI. P. CarterDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaK. J. CookDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaM. DasguptaDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaCh. E. DüllmannGSI Helmholtzzentrum für Schwerionenforschung, 64291, Darmstadt, GermanyD. Y. JeungDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaB. KindlerGSI Helmholtzzentrum für Schwerionenforschung, 64291, Darmstadt, GermanyB. LommelGSI Helmholtzzentrum für Schwerionenforschung, 64291, Darmstadt, GermanyD. H. LuongDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaE. PrasadDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaD. C. RaffertyDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaC. SenguptaDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaC. SimenelDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaE. C. SimpsonDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaJ. F. SmithDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaK. Vo-PhuocDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaJ. WalsheDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaA. WakhleDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaE. WilliamsDepartment of Nuclear Physics, RSPE, Australian National University, Canberra, ACT 2601, AustraliaA. YakushevGSI Helmholtzzentrum für Schwerionenforschung, 64291, Darmstadt, Germany

2018en

ABI

Annotatsiya

The production of the heaviest elements in fusion-evaporation reactions is substantially limited by very low cross sections, as fusion cross sections (including fusion-fission) are greatly reduced by the competing quasifission mechanism. Using the Australian National University Heavy Ion Accelerator Facility and CUBE detector array, fission fragments from the $^{48}\mathrm{Ti}+^{204,208}\mathrm{Pb}$ and $^{50}\mathrm{Ti}+^{206,208}\mathrm{Pb}$ reactions have been measured, with the aim to investigate how the competition between quasifission and fusion-fission evolves with small changes in entrance-channel properties associated mainly with the nuclear structure. Analysis of mass-distribution widths of strongly mass-angle-correlated fission fragments within the framework of the compound-nucleus fission theory demonstrates significant differences in quasifission (and therefore fusion) probabilities among the four reactions. The impact of nuclear structure on fusion highlights the importance of future radioactive beams.

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Identifikatorlar

DOI: 10.1103/physrevc.97.064618

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