Experimental study of the 13C+12C fusion reaction at deep sub-barrier energies

[摘要] Heavy-ion fusion reactions between light nuclei such as carbon and oxygen isotopes have been studied because of their significance for a wide variety of stellar burning scenarios. One important stellar reaction is12C+12C, but it is difficult to measure it in the Gamow window because of very low cross sections and several resonances occurring. Hints can be obtained from the study of13C+12C reaction. We have measured this process by an activation method for energies down to Ecm=2.5 MeV using13C beams from the Bucharest 3 MV tandetron and gamma-ray deactivation measurements in our low and ultralow background laboratories, the latter located in a salt mine about 100 km north of Bucharest. Results obtained so far are shown and discussed in connection with the possibility to go even further down in energy and with the interpretation of the reaction mechanism at such deep sub-barrier energies.

[发布机构] IFIN-HH, Bucharest-Magurele, Romania^1;N.T. Zhang, X. Tang- Institute of Modern Physics, Lanzhou, China^2;Y.J. Li- CIAE, Beijing, China^3

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Activation method;Barrier energy;Bucharest;Carbon and oxygen isotopes;Heavy-ion fusions;Light nuclei;Reaction mechanism;Stellar reactions