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

Muñoz-Britton, Tomás (2011). The search for the 2+ excitation of the 12C Hoyle state using the 12C(12C,12C[3alpha])12C reaction. University of Birmingham. Ph.D.

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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: Thesis (Doctorates > Ph.D.)
Award Type: Doctorates > Ph.D.
Supervisor(s):
Supervisor(s)EmailORCID
Freer, MartinUNSPECIFIEDUNSPECIFIED
Licence:
College/Faculty: Colleges (2008 onwards) > College of Engineering & Physical Sciences
School or Department: School of Physics and Astronomy
Funders: None/not applicable
Subjects: Q Science > QC Physics
URI: http://etheses.bham.ac.uk/id/eprint/3050

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