Investigation of the Hoyle state in 12C and the related triple alpha reaction rate
The fusion of three alpha particles to form the excited Hoyle state in ¹²C, and subsequent electromagnetic decay to the ground state, is the only known pathway to synthesis of stable carbon in the Universe. This process takes place in red giant stars, in which the helium density and temperature are su ciently high for three α particles to fuse. The Hoyle state is located energetically above the ⁸Be + α and 3α energies, which makes it a resonance for the triple-α process, and thus greatly...[Show more]
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