Status on $$^{\mathbf {12}}\mathbf {C}+{}^{\mathbf {12}}{\mathbf {C}}$$ fusion at deep subbarrier energies: impact of resonances on astrophysical $$S^{*}$$ factors
نویسندگان
چکیده
منابع مشابه
Fusion cross sections at deep subbarrier energies
A recent publication reports that heavy-ion fusion cross sections at extreme subbarrier 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...
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For a single potential barrier, the barrier penetrability can be inverted based on the WKB approximation to yield the barrier thickness. We apply this method to heavy-ion fusion reactions at energies well below the Coulomb barrier and directly determine the inter-nucleus potential between the colliding nuclei. To this end, we assume that fusion cross sections at deep subbarrier energies are gov...
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We perform semi-classical molecular dynamics simulations of screening by bound electrons in low energy nuclear reactions. In our simulations quantum effects corresponding to the Pauli and Heisenberg principle are enforced by constraints. In addition to the well known adiabatic and sudden limits, we propose a new ”dissipative limit” which is expected to be important not only at high energies but...
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We discuss the effects of double octupole and quadrupole phonon excitations in Sm on fusion reactions between O and Sm at subbarrier energies. The effects of anharmonicities of the vibrational states are taken into account by using the sdf -interacting boson model. We compare the results with those in the harmonic limit to show that anharmonicities play an essential role in reproducing the expe...
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ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2020
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/s10050-020-00075-2