^<6>Li(p, 2p)^5He Reaction and Alpha-Deuteron Cluster Model for ^<6>Li

概要

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To investigate the α-d cluster structure of ^<6gt;Li, the high-energy (p, 2p) reaction for the least-bound proton in ^<6>Li is analyzed. The reaction is treated as a quasi-free p-p knock-out collision in ^<6>Li followed by the n-α breaking-up of ^<5>He.The plane wave impulse approximation is made in the former process and the final-state interaction theory is applied for the latter one. The ground state of ^<6>Li is described by the totally antisymmetrized α-d cluster model wave function. where the relative wave function between the α and d clusters is assumed to have a correct behavior with an inner oscillation and a long tail, which are consistent with high-energy elastic electron scattering. The theory succeeds in understanding the experimental features of this reaction consistently. It is found that the features of this reaction are entirely due to the α-d cluster structure. of ^<6>Li and the unboundness of ^<5>He. In particular, in the angular correlation distribution the filling-up of the dip is due to the s-state component of extra proton in ^<6>Li and the s_<1/2>-wave neutron in ^<5>He, and the ratio of peak-to-valley is determined by the tail of the d-cluster wave function. It is, thus, pointed out that this reaction gives detailed information on the three-body correlation of the extra nucleons and the α core in ^<6>Li.
理論物理学刊行会の論文
1968-03-25