Constraining the 12C+12C astrophysical S-factors with the 12C+13C measurements at very low energies

• DOI: 10.1016/j.physletb.2019.135170
• Publication Date: 2019-12-27T16:18:45Z
• Authors: N.T. Zhang; X.Y. Wang; D. Tudor; B. Bucher; I. Burducea; H. Chen; Z.J. Chen; D. Chesneanu; A.I. Chilug; L.R. Gasques; D.G. Ghita; C. Gomoiu; K. Hagino; S. Kubono; Y.J. Li; C.J. Lin; W.P. Lin; R. Margineanu; A. Pantelica; I.C. Stefanescu; M. Straticiuc; X.D. Tang; L. Trache; A.S. Umar; W.Y. Xin; S.W. Xu; Y. Xu
• Keywords: Nuclear and High Energy Physics; Nuclear Theory; QC1-999; Astronomy; Nuclear physics; FOS: Physical sciences; 01 natural sciences; 7. Clean energy; Atomic physics; Nuclear Theory (nucl-th); Theoretical and Experimental Nuclear Structure; Interactions of Low-Energy Electrons with Matter and Atoms; 0103 physical sciences; Nuclear Experiment (nucl-ex); Fusion; Nuclear Experiment; Isotope; Cross section (physics); Physics; Hadron Physics and QCD; Linguistics; Atomic and Molecular Physics, and Optics; FOS: Philosophy, ethics and religion; Philosophy; Physics and Astronomy; 13. Climate action; Physical Sciences; FOS: Languages and literature; Mean-Field Models

We use an underground counting lab with extremely low background to perform activity measurement for the C12+13C system energies down Ec.m.=2.323 MeV, at which 12C(13C,p)24Na cross section is found be 0.22(7) nb. The fusion derived a statistical model calibrated using experimental data. Our new result of first decisive evidence in carbon isotope systems rules out existence astrophysical S-factor maximum predicted by phenomenological hindrance model, while confirming rising trend towards lower other models, such as CC-M3Y+Rep, DC-TDHF, KNS, SPP and ESW. After normalizing predictions our data, more reliable upper limit established C12+12C sections stellar energies.