Recent experiments of interaction and reaction cross sections and the related results

Recent experiments of interaction ($\sigma _{I})$ and reaction ($\sigma _{R})$ cross sections will be reviewed. Measurements of $\sigma _{I}$ and $\sigma _{R}$ have been proved to be effective tools to reveal the halo or skin structure in proton-rich and neutron-rich nuclei [1]. Very recently, $\sigma _{I}$ for $^{72-80}$Kr on carbon targets have been measured at FRS in GSI with relativistic energies ($\sim $1 $A$ GeV). Since the charge radii for the nuclei are known by optical isotope-shift measurements, by our $\sigma _{I}$ measurements the proton skin thickness of the nuclei can be investigated. Some tentative results of the measurements will be presented. $\sigma _{R}$ at intermediate energies are quite indispensable to deduce the effective matter density distributions by their energy dependence. Recently, $\sigma _{R}$ have been extensively measured at RIPS in RIKEN by a new setup [2]. As a byproduct, longitudinal momentum distributions of fragments from a projectile can be measured at the same time [3]. In special, one and two nucleon(s) removal channels can be observed at the same time. Recently, by the setup, we performed experiments for $^{14-19}$C and some proton rich nuclei including $^{23}$Al, that is a potential proton halo candidate due to its small proton separation energy. Some results of the experiments will also be introduced.\newline \newline [1] A.Ozawa et al., Nucl. Phys.A 693 (2001) 32.\newline [2] T.Zheng et al., Nucl. Phys. A 709 (2002) 103.\newline [3] T.Tamaguchi et al., Nucl. Phys. A 724 (2003) 3.