Speaker
Description
Observations of astrophysical phenomena, such as the luminosity of X-ray bursts and the abun-
dance pattern of stars, can be explained by nuclear reactions occurring in the stars. It is well known
that the nuclear reaction rates of nuclei involved in nucleosynthesis have a direct impact on stellar
evolution, such as energy generation, the nucleosynthesis path, and nal abundance pattern of the
elements. However, due to large uncertainties in theoretical models and a lack of measurements
with rare isotope beams for proton- and alpha-induced reactions, our knowledge of astronomical
observables is still far behind.
One recent sensitivity study showed the light curve of X-ray bursts is extremely sensitive to ( ,p)
reactions on proton-rich radioactive nuclei, including the 14O( ,p)17F reaction. In order to constrain
the astrophysical reaction rate, the cross section measurement along the large range of Ecm has been
proposed using the TexAT active target time projection chamber. With this measurement, we expect
to reduce the statistical uncertainty of the cross sections down by 5 to 13%, resulting in the signi cant
enhancement of the astrophysical uncertainty. Furthermore, we are developing a new detector system
to provide a high detection e ciency as well as a high energy and position resolution of particles,
namely AToM-X, at CENS.
Details of the experiment and new detector system will be presented. We will also discuss plans
to utilize this system for experiments of nuclear reactions using radioactive ion beams.
