Speaker
Description
The cross section of $\rm ^7Be(p,\gamma)^8B$ represents one of the more important reaction for the prediction of high energy component of solar neutrino spectrum and it has also a direct impact on the $\rm ^7Li$ abundance after the Big Bang Nucleosynthesis. The importance of this reaction triggered an intense experimental work over the last decades, where discrepancies were observed between the results of different measurements.
Considering that all measurements share the same experimental approach, i.e. an intense proton beam impinging on a $\rm ^7Be$ radioactive target, common systematic effects due to the complicated target stoichiometry and the deterioration under beam bombardment might possibly be the origin of the discrepancies observed. Inverse kinematics, i.e. a $\rm ^7Be$ ion beam and a hydrogen target, with the direct measurement of the total reaction cross section by means of the detection of the $\rm ^8B$ recoils, can shed light on such systematic effects. Efforts attempted so far were limited by the low $\rm ^7Be$ beam intensity.
Here we present the results obtained using the intense $\rm ^7Be$ beam in combination with a windowless gas target available at the Tandem Accelerator Laboratory at CIRCE (Center for Isotopic Research on Cultural and Environmental heritage), University of Campania, Italy coupled to the recoil mass separator ERNA (European Recoil mass separator for Nuclear Astrophysics) in the energy range $E_{cm}=367$ to $812$ keV.
| Length of presentation requested | Oral presentation: 17 min + 3 min questions |
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| Please select between one and three keywords related to your abstract | Nuclear physics - experimental |
