Measurement of $\Gamma$ partial widths from carbon-12 excited states using CHIMERA

Favela F., Acosta L., Auditore L., Camaiani A., Cardella G., De~Filippo E., De~Luca S., Gelli N., Gnoffo B., Mari n-Lá mbarri D.J., Lanzalone G., Maiolino C., Martorana N.S., Nannini A., Pagano A., Pagano E.V., Papa M., Pirrone S., Politi G., Pollacco E., Quattrocchi L., Rizzo F., Russotto P., Trifirò A., Trimarchi M.

I - Fisica nucleare e subnucleare
Aula 32B-1 - Mercoledì 19 h 11:00 - 13:00
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Measuring very small $\Gamma$ partial widths of ${}^{12}$C of the Hoyle and the 9.6 MeV states over the particle emission threshold are of astrophysical interest. In the reaction $\alpha + {}^{12}C \rightarrow \alpha + ({}^{12}C^{*} +\gamma )$ we used a multi-particle coincidence technique developed for CHIMERA in order to suppress the background. Details of the suppression method and the first results of the analysis will be presented.

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