Phys. Rev. C 67, 054603 (2003) [4 pages]Fusion cross sections at deep sub-barrier energiesReceived 12 February 2003; published 9 May 2003 A recent publication reports that heavy-ion fusion cross sections at extreme sub-barrier energies show a continuous change of their logarithmic slope with decreasing energy, resulting in a much steeper excitation function compared with theoretical predictions. We show that the energy dependence of this slope is partly due to the asymmetric shape of the Coulomb barrier; that is, its deviation from a harmonic shape. We also point out that the large low-energy slope is consistent with the surprisingly large surface diffusenesses required to fit recent high-precision fusion data. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.67.054603
DOI:
10.1103/PhysRevC.67.054603
PACS:
25.70.Jj, 24.10.Eq
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.