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Entrance-channel effects in heavy-ion capture: role of octupole phonons

Abstract : The introduction of the "experimental barrier distribution" d2(Eσfus)/dE2 gave a simple means of highlighting the dynamics of heavy-ion fusion reactions, as well as giving a demanding test of the quality of theoretical calculations. However, in many cases where data have been taken at deep sub-barrier energies, understanding the distribution is not sufficient. Here, the logarithmic derivative d[ln(Eσfus)]/dE provides a very useful additional test. It is suggested that high-lying octupole phonon states, long thought simply to give a global shift of the distribution downward in energy, may play a more complex role in the reaction dynamics, contributing much to the underlying physics of both the above functions.
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http://hal.in2p3.fr/in2p3-00785877
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Submitted on : Thursday, February 7, 2013 - 11:20:50 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:32 PM

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N. Rowley, K. Hagino. Entrance-channel effects in heavy-ion capture: role of octupole phonons. 10th International Conference on Nucleus-Nucleus Collisions (NN2009), Aug 2009, Beijing, China. pp.110c-116c, ⟨10.1016/j.nuclphysa.2009.12.018⟩. ⟨in2p3-00785877⟩

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