Quadrupole moments of Λ-hypernuclei

Using the shell model wave functions, we have studied quadrupole moments of hypernuclei, and obtained the shell model values of quadrupole moments of NΛ systems (N=p and n). With the use of the first-order perturbation theory, we have also estimated the configuration mixing effects on quadrupole moments of these NΛ hypernuclei. We show that the hyperon-induced configuration mixing effects are small and the nucleon-induced configuration mixing effects are large in many cases. (author)