Speaker
Gabor Kiss
(MTA Atomki)
Description
The 3He(α,γ)7Be reaction plays an important role in several astrophysical scenarios including stellar hydrogen burning and Big Bang nucleosynthesis [1]. Contrary to its importance – and despite the large number of experimental and theoretical works devoted to this reaction (e.g. [2,3,4] and further references therein) – the knowledge on the reaction cross section at the relevant energies is still limited and further experimental efforts are needed [5,6].
The precise knowledge on the external capture contribution to the 3He(α,γ)7Be reaction cross section is of crucial for the theoretical description reaction mechanism. Therefore, the aim of the present work is to measure this direct contribution using the Asymptotic Normalization Coefficient technique [7] and through this to improve our knowledge on the reaction rate at the temperatures of the solar core.
To extract the 3He(α,γ)7Be reaction cross section, the angular distribution of deuterons emitted in the 6Li(3He,d)7Be α-transfer reaction was measured with high precision at several energies. The experimental details and the preliminary results are planned to be presented.
[1] C. Iliadis, Nuclear Physics of Stars (New York: Wiley) (2007).
[2] D. Bemmerer et al., Phys. Rev. Lett. 97 (2006) 122502.
[3] A. Di Leva et al., Phys. Rev. Lett. 102 (2009) 232502.
[4] T. Neff, Phys. Rev. Lett. 106 (2011) 042502.
[5] E. G. Adelberger et al., Rev. Mod. Phys. 83 (2011) 195.
[6] R. J. deBoer et al., Phys. Rev. C 90 (2014) 035804.
[7] H. M. Xu el al., Phys. Rev. Lett. 73 (1994) 2027.
Primary author
Gabor Kiss
(MTA Atomki)
