Quadrupole deformation in \( \Lambda\)-hypernuclei
Shapes of light normal nuclei and \( \Lambda\) -hypernuclei are investigated using the relativistic mean-field approach. The FSUGold parametrization is used for this purpose. The addition of a \( \Lambda\) is found to change the shape of the energy surface towards positive deformation, i.e., prolate shape. The deformation in a \( \Lambda\) -hypernucleus, when the hyperon is in the first excited state, is also discussed. The effect of the inclusion of the hyperon on the nuclear radius is generally small with one exception.