arXiv subjects

E. Takada

Publications and source records attributed to E. Takada.

2 recordsLinked to original sources

arXiv2023

Silicon tracker array for RIB experiments at SAMURAI

This work describes a silicon tracker system developed for experiments with proton-rich radioactive ion beams at the SAMURAI superconducting spectrometer of RIBF at RIKEN. The system is designed for accurate angular reconstruction and atomic number identification of relativistic heavy ions and protons which are simultaneously produced in reactions motivated by studies of proton capture reactions of interest for nuclear astrophysics. The technical characteristics of the tracking array are described in detail as are its performance in two pilot experiments. The physics justification for such a system is also presented.

physics.ins-det↗

arXiv2014

Beam energy dependence of charged pion ratio in $^{28}$Si + In reactions

The double differential cross sections for $^{nat}$In($^{28}$Si, $π^{\pm}$) reactions are measured at 400, 600, and 800 MeV/nucleon. Both $π^+$ and $π^-$ are found to be emitted isotropically from a single moving source. The $π^- / π^+$ yield ratio is determined as a function of the charged pion energy between 25 and 100 MeV. The experimental results significantly differ from the prediction of the standard transport model calculation using the code PHITS. This discrepancy suggests that more theoretical works are required to deduce firm information on the nuclear symmetry energy from the $π^- / π^+$ yield ratio.

nucl-ex↗