Rotational excitation of the Hoyle state in 12C
ISISOL Collaboration. (2018). Rotational excitation of the Hoyle state in 12C. In Nuclear Physics in Astrophysics VII (NPA7 2015) York, UK, May 18-22, 2015 (pp. 012043). Journal of Physics : Conference Series, 940. IOP Publishing. doi:10.1088/1742-6596/940/1/012043
Published inJournal of Physics : Conference Series;940
Garg, R. |
© the Authors, 2018. This is an open access article distributed under the terms of the Creative Commons License.
12C is synthesised in stars by fusion of three α particles. This process occurs through a resonance in the 12C nucleus, famously known as the Hoyle state. In this state, the 12C nucleus exists as a cluster of α particles. The state is the band-head for a rotational band with the 2+ rotational excitation predicted in the energy region 9 - 11 MeV. This rotational excitation can affect the triple-α process reaction rate by more than an order of magnitude at high temperatures (109 K). Depending on the energy of the resonance, the knowledge of the state can also help determine the structure of the Hoyle state. In the work presented here, the state of interest is populated by beta decay of radioactive 12N ion beam delivered by the IGISOL facility at JYFL, Jyväskylä.