Мақола

Enhanced Fusion-Evaporation Cross Sections in Neutron-Rich<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">S</mml:mi><mml:mi mathvariant="normal">n</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mn>132</mml:mn></mml:mmultiscripts></mml:math>on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">N</mml:mi><mml:mprescripts/><mml:none/><mml:mn mathvariant="normal">64</mml:mn></mml:mmultiscripts><mml:mi mathvariant="normal">i</mml:mi></mml:math>

J. F. LiangPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAD. ShapiraPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAC. J. GrossPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAJ. R. BeenePhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAJ. D. BiermanPhysics Department AD-51, Gonzaga University, Spokane, Washington 99258-0051, USAA. Galindo-UribarriPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAJ. Gómez del CampoPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAPaul HausladenPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAY. LarochelleDepartment of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USAW. LovelandDepartment of Chemistry, Oregon State University, Corvallis, Oregon 97331, USAP. E. MuellerPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAD. PetersonDepartment of Chemistry, Oregon State University, Corvallis, Oregon 97331, USAD. C. RadfordPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAD. W. StracenerPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAR. L. VarnerPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

2003lv

ABI

Аннотация

Evaporation residue cross sections have been measured with neutron-rich radioactive $^{132}\mathrm{S}\mathrm{n}$ beams on $^{\mathrm{64}}\mathrm{N}\mathrm{i}$ in the vicinity of the Coulomb barrier. The average beam intensity was $2\ifmmode\times\else\texttimes\fi{}{10}^{4}$ particles per second and the smallest cross section measured was less than 5 mb. Large sub-barrier fusion enhancement was observed. Coupled-channel calculations taking into account inelastic excitation significantly underpredict the measured cross sections below the barrier. The presence of several neutron transfer channels with large positive $Q$ values suggests that multinucleon transfer may play an important role in enhancing the fusion of $^{132}\mathrm{S}\mathrm{n}$ and $^{\mathrm{64}}\mathrm{N}\mathrm{i}$.

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Идентификаторлар

DOI: 10.1103/physrevlett.91.152701

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