Speaker
Description
The symmetry energy in the equation of state (EoS) of nuclear matter remains one of the key open questions in both nuclear physics and astrophysics, with significant implications for phenomena such as neutron stars and supernova explosions. Our approach focuses on the differences in proton and neutron density distributions among isotopes, which are expected to provide deeper insight into the nuclear matter EoS. It has been well established in the literature that the angular distribution of proton elastic scattering is particularly sensitive to the neutron and proton density distributions. This sensitivity is especially pronounced for magic nuclei such as Ca (Z=20) and Sn (Z=50), where the proton shell is closed.
A measurement of proton elastic scattering for the neutron-rich nucleus 50Ca has been performed in inverse kinematics at the RIKEN RI Beam Factory (RIBF). In this study, a newly developed ∆E-E telescope array, DELTA—consisting of Silicon Strip Detectors (SSD) and GAGG(Ce) calorimeters (GAGG)—was employed to measure the four-momentum of the recoil protons, in addition to the existing ∆E-E telescope system. In this presentation, results of the 50Ca(p,p) elastic scattering experiment obtained using the missing mass method will be reported. As a next step, we aim to extend this study to proton elastic scattering for 52Ca. Developmental studies toward this future experiment will also be discussed.
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