G. Lian

Current progress of nuclear astrophysics study and BRNBF at CIAE

Abstract A secondary beam line (GIRAFFE) at the Beijing tandem accelerator lab was constructed for yielding low energy secondary beams. The current progress on the study of nuclear astrophysics and nuclear structure is presented. Up to now, we have carried out measurement of 7 Be(d,n) 8 B, 11 C(d,n) 12 N, 8 Li(d,n) 9 Be and 6 He(p,n) 6 Li reactions. The proposed Beijing radioactive nuclear beam facility and its current R&D progress are briefly introduced. This facility is based on the exist HI-13 tandem accelerator. A proton cyclotron will be built to provide 100 MeV 200 μA proton beam, together with an isotope separator on line system and a super-conducting heavy ion LINAC. By this facility, intensity of order of 10 9 pps radioactive nuclear beams for mass up to A =120 will be produced.

A proposed direct measurement of cross section at Gamow window for key reaction 19F(p,α) 16O in Asymptotic Giant Branch stars with a planned accelerator in CJPL

In 2014, the National Natural Science Foundation of China (NSFC) approved the Jinping Underground Nuclear Astrophysics laboratory (JUNA) project, which aims at direct cross-section measurements of four key stellar nuclear reactions right down to the Gamow windows. In order to solve the observed fluorine overabundances in Asymptotic Giant Branch (AGB) stars, measuring the key 19F(p,α)16O reaction at effective burning energies (i.e., at Gamow window) is established as one of the scientific research sub-projects. The present paper describes this sub-project in details, including motivation, status, experimental setup, yield and background estimation, aboveground test, as well as other relevant reactions.

The 8Li(d, p)9Li reaction and the astrophysical 8Li(n, γ)9Li reaction rate

The

The Li 8 ( d , p ) Li 9 reaction and the astrophysical Li 8 ( n , γ ) Li 9 reaction rate

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Proton widths of the low-lying16Fstates from the15N(7Li,6Li)16Nreaction

Li(

Spectroscopic factors for low-lying

n,\gamma

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)

N levels and the astrophysical

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^{15}

Li reaction plays an important role in both the r-process nucleosynthesis and the inhomogeneous big bang models, its direct capture rates can be extracted from the

N

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