First experimental constraint of the spectroscopic amplitudes for the α-cluster in the 11B ground state

• DOI: 10.1016/j.physletb.2019.134820
• Publication Date: 2019-07-31T11:30:21Z
• Authors: Y.P. Shen; B. Guo; T.L. Ma; D.Y. Pang; D.D. Ni; Z.Z. Ren; Y.J. Li; Z.D. An; J. Su; J.C. Liu; Q.W. Fan; Z.Y. Han; X.Y. Li; Z.H. Li; G. Lian; Y. Su; Y.B. Wang; S.Q. Yan; S. Zeng; W.P. Liu
• Keywords: Nuclear astrophysics

We present the first experimental determination on spectroscopic amplitudes (SAs) for α-cluster in B11 ground state via Li7(Li6,d)11B reaction using a high-precision magnetic spectrograph. This is believed to have strong effect studies of α-induced reactions which are crucial nuclear astrophysics. It found that previous SAs from shell model calculations cause overestimations up 23% C12(α,γ)16O SE2(300) factor and 34% C13(α,n)16O S(190) with respect results experimentally determined SAs. Due importance these two reactions, example uncertainty cross section at Ec.m. = 300 keV required be better than 10% by stellar modeling, new S-factors could result potential influence astrophysical network calculations.