Limitation of Heavy-Ion Fusion: Fusion of Aligned <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Na</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>23</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> with <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Na</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>23</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

K. Blatt; K. Becker; B. Heck; H. Jänsch; H. Leucker; D. Fick; R. Čaplar; R. Butsch; D. Krämer; K. -H. Möbius; Z. Moroz; W. Ott; P. Paul; E. Steffens; G. Tungate; Irena M. Turkiewicz; A. Weller

doi:10.1103/PhysRevLett.57.819

Limitation of Heavy-Ion Fusion: Fusion of Aligned ${}^{23}{Na}$ with ${}^{23}{Na}$

K. Blatt, K. Becker, B. Heck, H. Jänsch, H. Leucker, D. Fick, R. Čaplar, R. Butsch, D. Krämer, K. -H. Möbius, Z. Moroz, W. Ott, P. Paul, E. Steffens, G. Tungate, Irena M. Turkiewicz, and A. Weller

Phys. Rev. Lett. 57, 819 – Published 18 August 1986

Abstract

The excitation function for fusion of ${}^{23}{Na}$ with ${}^{23}{Na}$ was measured in the energy range $40 <~ E_{c . m .} <~ 88.5$ MeV. Additionally, the tensor analyzing power $T_{20}$ was determined to be $T_{20} = - 0.0060 \pm 0.0125$ at $E_{c . m .} = 85$ MeV. The results are discussed in terms of an entrance-channel versus a compound-nucleus model for the observed limitation of fusion. A typical entrance-channel model, the surface-friction model, which is able to describe all fusion excitation functions leading to ${}^{46}{Ti}$ , fails to reproduce the observed value of $T_{20}$ . The data are consistent, on the other hand, with the compound-nucleus interpretation.

Received 10 December 1985

DOI:https://doi.org/10.1103/PhysRevLett.57.819

Authors & Affiliations

K. Blatt, K. Becker, B. Heck, H. Jänsch, H. Leucker, and D. Fick

Fachbereich Physik, Philipps-Universität, 3550 Marburg, West Germany

R. Čaplar

Rudjer Bošković Institute, 41001 Zagreb, Yugoslavia

R. Butsch, D. Krämer, K. -H. Möbius, Z. Moroz^*, W. Ott, P. Paul^†, E. Steffens, G. Tungate, Irena M. Turkiewicz, and A. Weller

Max-Planck-Institut für Kernphysik, 6900 Heidelberg, West Germany

^*On leave of absence from Institute of Nuclear Studies, Swierk, Poland.
^†On leave of absence from Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, New York 11794.