Extending the Hoyle-State Paradigm to 12 C + 12 C Fusion
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Date
2022
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
Carbon burning is a key step in the evolution of massive stars, Type 1a supernovae and superbursts in
x-ray binary systems. Determining the 12C þ 12C fusion cross section at relevant energies by extrapolation
of direct measurements is challenging due to resonances at and below the Coulomb barrier. A study of the
24Mgðα; α0Þ24Mg reaction has identified several 0þ states in 24Mg, close to the 12C þ 12C threshold, which
predominantly decay to 20Neðground stateÞ þ α. These states were not observed in 20Neðα; α0
Þ20Ne
resonance scattering suggesting that they may have a dominant 12C þ 12C cluster structure. Given the
very low angular momentum associated with sub-barrier fusion, these states may play a decisive role
in 12C þ 12C fusion in analogy to the Hoyle state in helium burning. We present estimates of updated
12C þ 12C fusion reaction rates.
Description
Keywords
Hoyle-State, Paradigm, 12C+ 12C, Fusion, supernovae, superbursts
Citation
@article{PhysRevLett.129.102701, title = {Extending the Hoyle-State Paradigm to $^{12}\mathrm{C}+^{12}\mathrm{C}$ Fusion}, author = {Adsley, P. and Heine, M. and Jenkins, D. G. and Courtin, S. and Neveling, R. and Br\"ummer, J. W. and Donaldson, L. M. and Kheswa, N. Y. and Li, K. C. W. and Mar\'{\i}n-L\'ambarri, D. J. and Mabika, P. Z. and Papka, P. and Pellegri, L. and Pesudo, V. and Rebeiro, B. and Smit, F. D. and Yahia-Cherif, W.}, journal = {Phys. Rev. Lett.}, volume = {129}, issue = {10}, pages = {102701}, numpages = {6}, year = {2022}, month = {Sep}, publisher = {American Physical Society}, doi = {10.1103/PhysRevLett.129.102701}, url = {https://link.aps.org/doi/10.1103/PhysRevLett.129.102701} }