Multiparameter variational calculations of the hypernuclei $^9_{\Lambda}Be (\alpha+ \alpha + \Lambda)$ and $^1_{\Lambda \Lambda}Be (\alpha +\alpha +\Lambda + \Lambda)$ and the quasi-molecular hypernuclear system $\alpha - \Lambda - \alpha$ with parallel orientation of the deuteron spins are performed with semirealistic potentials. The clustering effect in hypernuclei is investigated, as well as the influence of the form of the $\Lambda \Lambda$ potential on the binding energy of the double hypernuclei.
Department of Theoretical Physics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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