Speaker
Description
In FY2025, the world’s largest active target, the AT-TPC developed at FRIB, was installed at the radioactive-ion beam line (EN course) of the Research Center for Nuclear Physics (RCNP), Osaka University. In this campaign, six experiments were carried out. Five of these experiments involved radioactive-ion beams, in which reactions of secondary beams at 20–30 MeV/u ($^{11}$Be, $^{12}$Be, $^{13}$B, $^{17}$N, and $^{17}$C) with a deuterium target were measured. The secondary beams were produced via projectile fragmentation of $^{18}$O beams at 60 MeV/u and $^{22}$Ne beams at 50 MeV/u on $^{9}$Be targets. The AT-TPC was operated with C$_3$D$_8$ gas at 450 Torr (isotopic purity of 99%) that served also a deuterium target. The (d,p), (d,d), (d,d'), (d,t), and (d,$^3$He) reactions were measured. The mass thickness of the deuterium target was 42 mg/cm$^2$.
In this presentation, after introducing each experiment, we report on the experimental setup at the EN course and the current status of the AT-TPC data analysis.