Four-Alpha Linear-Chain States in 16O

Details Four-Alpha Linear-Chain States in 16O Four-Alpha Linear-Chain States in 16O

1996-06-28

arxiv.org/abs/nucl-th/9606056v1

Physics

Nuclear Physics

Nuclear Theory

LaTeX file and 4 ps figures (16 pages total)

Scientific paper

We study 4$\alpha$ linear-chain states in 16O in comparison with 3$\alpha$ states in 12C by using the Generator Coordinate Method within a microscopic $N\alpha$-cluster model. It is shown to be very important to solve relative motion of $\alpha$-clusters by taking into account the orthogonality between the linear-chain states and other low-lying states including the ground state. For 12C, the 3$\alpha$ chain state disappears because of this orthogonality. The $4\alpha$ chain state in 16O, on the other hand, is hardly affected by low-lying states and persists to remain above the 4$\alpha$ threshold. The calculated moment of inertia of the $4\alpha$ linear-chain rotational band (88 keV) reproduces the experimentally suggested value qualitatively.

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