EuNPC2015

Preliminary alpha capture cross sections on p-nuclei at energies close to the Gamow window will be presented. The cross section were measured by means of the activation method using an alpha beam delivered by the IFIN-HH tandem accelerator. The induced activities were measured in close-to-detection geometry using two large volume HPGe detectors in a low background passive shielding.

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 – the knowledge on the reaction cross section at the relevant energies is still limited and further experimental efforts...

Accelerated expansion of our universe, as evidenced by Supernovae Ia (SNeIa), Cosmic Microwave Background (CMB) radiation anisotropies, Large Scale Structure (LSS) and X-ray experiments, is well documented in literature. A missing energy component, also known as Dark Energy (DE) with negative pressure, is widely considered by scientists as the responsible of this accelerated expansion. A DE...