Maqola

Entrance channel dependence of quasifission in reactions forming<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Th</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>220</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

R. G. ThomasDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, AustraliaD. J. HindeDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, AustraliaD. DuniecDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, AustraliaFriedemann ZenkeDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, AustraliaM. DasguptaDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, AustraliaMichael D. BrownDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, AustraliaM. EversDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, AustraliaL. R. GasquesDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, AustraliaM. D. RodríguezDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, AustraliaA. Díaz-TorresDepartment of Nuclear Physics, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, Australia

2008lv

ABI

Annotatsiya

Mass-angle correlations of binary fragments produced in $^{16}\mathrm{O}+^{204}\mathrm{Pb}$, $^{34}\mathrm{S}+^{186}\mathrm{W}$, and $^{48,50}\mathrm{Ti}+^{166,170}\mathrm{Er}$ reactions have been measured for a range of bombarding energies around their Coulomb barriers. At above-barrier energies, the width of the mass distributions for the fission-like fragments in the $^{50}\mathrm{Ti}+^{170}\mathrm{Er}$ reaction are found to be higher than those from the same compound system at similar excitation energies populated via the more mass asymmetric entrance channel reaction $^{34}\mathrm{S}+^{186}\mathrm{W}$, which in turn is higher than those for the $^{16}\mathrm{O}+^{204}\mathrm{Pb}$ system. The width of the mass distributions of the $\mathrm{Ti}+\mathrm{Er}$ systems is found to increase with decreasing bombarding energies, in contrast with those of the $^{16}\mathrm{O}+^{204}\mathrm{Pb}$ and $^{34}\mathrm{S}+^{186}\mathrm{W}$ systems, which show a monotonic reduction in mass widths. This may be associated with the elongated contact configuration at sub-barrier energies.

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DOI: 10.1103/physrevc.77.034610

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