Abstract

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.

Details

Title
Rotational excitation of the Hoyle state in 12C
Author
Garg, R 1 ; Barton, C 1 ; C Aa Diget 1 ; Courtin, S 2 ; Fruet, G 2 ; Fynbo, H O U 3 ; Howard, A 3 ; Illana, A 4 ; Jenkins, D G 1 ; Marroquin, I 5 ; Kirsebom, O S 3 ; Lund, M V 3 ; Moore, I 6 ; Perea, A 5 ; Refsgaard, J 3 ; Riley, J E 1 ; Rinta-Antila, S 6 ; Sinclair, L 1 ; Tengblad, O 5 ; The IGISOL Collaboration 6 

 Department of Physics, University of York, YO10 5DD, UK 
 Institut Pluridisciplinaire Hubert Curien, 67037 Strasbourg Cedex 2, France 
 Department of Physics and Astronomy, University of Aarhus, 8000 Arhus C, Denmark 
 Instituto Estructura de la Materia, CSIC, Serrano 113bis, E-28006, Madrid, Spain; IKS, Leuven, Belgium 
 Instituto Estructura de la Materia, CSIC, Serrano 113bis, E-28006, Madrid, Spain 
 Department of Physics, University of Jyväskylä, FIN-40351 Jyväskylä, Finland 
Publication year
2018
Publication date
Jan 2018
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2571917710
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.