Abstract
The momentum distribution reflects the two-nucleon correlation in nuclei. The momentum distribution for the valence nucleons is calculated for both 6He and 6Li in a three-body model of α + N + N. The ground state solution for the three-body Hamiltonian is obtained accurately using correlated basis functions. The distribution depends on the type of the N-N interaction. With use of a realistic potential, the 6He momentum distribution exhibits a dip around 2fm−1 characteristic of S-wave motion. In contrast to this, the 6Li momentum distribution is similar to that of the deuteron; no dip appears because it is filled with the D-wave component arising from the tensor force.
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