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# The search for the 2+ excitation of the 12C Hoyle state using the 12C(12C,12C[3alpha])12C reaction

Muñoz-Britton, Tomás (2011)
Ph.D. thesis, University of Birmingham.

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## Abstract

A search was conducted for the 2$$^+_2$$ excitation of the 7.65 MeV, 0$$^+_2$$, Hoyle state in $$^{12}$$C using the $$^{12}$$C($$^{12}$$C, $$^{12}$$C[3α]) $$^{12}$$C reaction. The analysis focussed primarily on the 9.7 MeV region in the $$^{12}$$C excitation energy spectrum and no evidence of a resonance was found. Monte Carlo simulations were used to investigate the minimum strength at which a resonance would need to exist in order to be resolved by the experimental setup used. The possibility was also investigated that the 2$$^+_2$$ resonance may be observed in the $$^{12}$$C($$^{12}$$C, $$^{12}$$C[$$^8$$Be*+α]) $$^{12}$$C reaction channel, though the methods contained within this thesis allowed only limited analysis of reaction channels involving non-zero spin states in the intermediate $$^8$$Be nucleus; no evidence of a resonance was found. Further analysis of the 9.6 MeV and 10 MeV regions of the $$^{12}$$C excitation energy spectrum also revealed no clear sign of a 2$$^+_2$$ resonance.

Type of Work: Ph.D. thesis. Freer, Martin Colleges (2008 onwards) > College of Engineering & Physical Sciences School of Physics and Astronomy QC Physics University of Birmingham 3050
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