Light nuclei production in isobaric ⁹⁶Ru + ⁹⁶Ru and ⁹⁶Ru + ⁹⁶Ru collisions at 7.7-200 GeV from a multiphase transport model

The production of light nuclei in isobaric ⁹⁶₄₄Ru + ⁹⁶₄₄Ru and ⁹⁶₄₀Zr + ⁹⁶₄₀Zr collisions, ranging from √sNN = 7.7 to 200 GeV, are studied using the string melting version of A Multi Phase Transport (AMPT) model in combination with a coalescence approach to light nuclei production. From the calculated yields, transverse momentum pT spectra, and rapidity dependences of light nuclei p, n, d, t, ³He, we find that the Ru+Ru/Zr+Zr ratios for the yields of these particles exceed unity with the inclusion of a quadrupole deformation β₂ and octupole deformation β₃ as well as the neutron skins. We also find that heavier particles have a larger deviation from unity. Furthermore, we find that as the collision energy increases, the influence of isospin effects on the production of light nuclei in isobar collisions gradually decreases, while the influence of nuclear structure becomes more significant, particularly evident from the energy dependence of the deuteron ratio, which is unaffected by isospin effects.