Constraints on Neutron Skin Thickness and Nuclear Deformations Using Relativistic Heavy-ion Collisions from STAR

In these proceedings, we present the measurements of neutron skin thickness and nuclear deformation using isobar $^{96}_{44}$Ru+$^{96}_{44}$Ru $^{96}_{40}$Zr+$^{96}_{40}$Zr collisions at $\sqrt{s_{_{\rm NN}}}=200$ GeV by STAR detector. The significant deviations from unity ratios elliptic flow $v_{2}$, triangular $v_{3}$, mean $p_{\rm T}$ fluctuations $\langle\delta p_{\rm T}^{2}\rangle/\langle T}\rangle^{2}$, asymmetric cumulant ${\rm ac}_{2}\{3\}$ indicate large differences in their quadrupole octuple deformations. produced hadron multiplicity $N_{\rm ch}$, transverse momentum $\langle T}\rangle$, net charge number $\Delta Q$ a halo-type for Zr nucleus, much thicker than Ru consistent with structure calculations. We discuss how extract thickness, symmetry energy slope parameter, parameters data.