Статья

Barrier distributions from the fusion of oxygen ions with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Sm</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>1</mml:mn><mml:mn>4</mml:mn><mml:mn>4</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mn>4</mml:mn><mml:mn>8</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mn>5</mml:mn><mml:mn>4</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">W</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>186</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>

J. R. LeighDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaM. DasguptaDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaD. J. HindeDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaJ. C. MeinDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaC. R. MortonDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaR. C. LemmonDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaJ. P. LestoneDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaJ.O. NewtonDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaH. TimmersDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaJ. WeiDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaN. RowleyDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, Australia

1995lv

ABI

Аннотация

Fusion excitation functions for the reactions $^{144,148,154}\mathrm{Sm}$ and $^{186}\mathrm{W}$ + $^{16}\mathrm{O}$ and $^{144}\mathrm{Sm}$ + $^{17}\mathrm{O}$ have been measured with high precision, both in the cross sections and the small energy intervals, thus allowing meaningful fusion barrier distributions to be extracted. In this representation it is clearly seen that the excitation functions are not smooth and featureless; each is unique and is shown to depend on the details of the structure of the interacting nuclei. The effects of excitation of the collective single phonon states in $^{144}\mathrm{Sm}$ are evident. For the $^{17}\mathrm{O}$ projectile, the role of additional coupling to neutron stripping channels with positive Q values can be seen. As expected, the barrier distributions associated with $^{154}\mathrm{Sm}$ and $^{186}\mathrm{W}$ are dominated by deformation effects. However, the data appear to display sensitivity to additional couplings, even though they involve relatively weak inelastic and transfer channels.

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Идентификаторы

DOI: 10.1103/physrevc.52.3151

Цитирования и источники

Цитирований: 2Использованных источников: 0

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