SMITH, Robin, BISHOP, Jack, WHELDON, Carl and KOKALOVA, Tzany (2019). Theoretical approaches to the 3α break-up of 12C. Journal of Physics: Conference Series, 1308 (1), 012021.
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Smith_theorectical_approaches_to_the_3a_break-up.pdf - Published Version
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Smith_theorectical_approaches_to_the_3a_break-up.pdf - Published Version
Available under License Creative Commons Attribution.
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Abstract
Abstract Two recent experiments have indicated that the break-up of the 12C Hoyle state is dominated by the sequential 8Be(g.s.) + α decay channel. The rare direct 3α decay was found to contribute with a branching ratio of less than 0.047% (95% C.L.). However, the ability of experimentalists to successfully disentangle these two competing decay channels relies on accurate theoretical predictions of how they each manifest in phase space distribution of the three break-up α-particles. The following paper reviews the current theoretical approaches to calculating the break-up of the Hoyle state and introduces a semi-classical WKB approach, which adequately reproduces the results of more sophisticated calculations. It is proposed that a more accurate upper limit on this branching ratio may be obtained if these new theoretical results are taken into account when analysing experimental data.
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