Статья

Mapping quasifission characteristics and timescales in heavy element formation reactions

R. du RietzDepartment of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, ACT 0200, AustraliaE. WilliamsDepartment of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, ACT 0200, AustraliaD. J. HindeDepartment of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, ACT 0200, AustraliaM. DasguptaDepartment of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, ACT 0200, AustraliaM. EversDepartment of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, ACT 0200, AustraliaC. J. LinDepartment of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, ACT 0200, AustraliaD. H. LuongDepartment of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, ACT 0200, AustraliaC. SimenelDepartment of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, ACT 0200, AustraliaA. WakhleDepartment of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, ACT 0200, Australia

2013en

ABI

Аннотация

Background: The formation of superheavy elements by fusion of two massive nuclei is severely inhibited by the competing quasifission process.Purpose: Through extensive mass-angle distribution measurements, we map out the systematic dependence of quasifission characteristics as a function of the identity of the colliding nuclei.Methods: The Australian National University's Heavy Ion Accelerator Facility and CUBE spectrometer have been used to measure mass-angle distributions for 42 reactions forming heavy elements. Beam energies above their respective capture barriers were used to minimize the known influence of nuclear structure effects.Results: Different mappings of mass-angle distribution characteristics (including timescales) over the nuclear landscape show a systematic dependence on entrance channel and compound nucleus fissilities.Conclusions: The results provide an empirical baseline to assess effects of nuclear structure at lower beam energies, and motivate the testing and validation of complete dynamical models of heavy element fusion through comparison of mass-angle distributions.

Перевод пока недоступен

Идентификаторы

DOI: 10.1103/physrevc.88.054618

Цитирования и источники

Цитирований: 5Использованных источников: 0

Показатели — AkademScholar