C12+16O molecular resonances at deep sub-barrier energy

The existence of C12+16O molecular resonances at sub-barrier energy has been a significant problem in nuclear astrophysics because they strongly affect the C12+16O fusion reaction rate in type Ia supernovae and heavy stars. However, experimental surveys have been limited to 4 MeV and cannot access t...

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Bibliographic Details
Main Authors: Yasutaka Taniguchi, Masaaki Kimura
Format: Article
Language:English
Published: Elsevier 2020-01-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269319308081
Description
Summary:The existence of C12+16O molecular resonances at sub-barrier energy has been a significant problem in nuclear astrophysics because they strongly affect the C12+16O fusion reaction rate in type Ia supernovae and heavy stars. However, experimental surveys have been limited to 4 MeV and cannot access the deep sub-barrier energy due to a very small fusion cross section. Here we predict a couple of resonances with Jπ=0+, 2+, and 4+ in the deep sub-barrier energy based on the antisymmetrized molecular dynamics calculation that reproduces the known resonances and low-lying spectrum of Si28. Keywords: Molecular resonance, Nucleosynthesis, Astrophysics, Cluster structure
ISSN:0370-2693