Abstract
Recently, it was supposed the nα light nuclei may have structures resembling the diluted gas of α particles which could be considered as Bose-Einstein condensate (αBEC) in nuclear systems. At the present time, the only more or less definite candidate for an αBEC state predicted by theory is the second 0+ state of 12C (E = 7.65 MeV) located near the threshold 12C → 3α. We discuss several possible experimental approaches to study the properties of interest of the 7.65-MeV level of 12C. Among them are shift of the positions of the rainbow minima in the inelastic scattering to this level, extraction of the empirical inelastic form factor from the α and 3He scattering and its comparison with theoretical predictions, and getting information on the 8Be transfer reaction form factor. The conclusion was drawn that new measurements of 12C(α, α′) 12C(7.65) inelastic scattering at ∼120 MeV in the full angular range would be most adequate to solving the problem. The possibility of observation of αBEC effects in heavier nα nuclei is also discussed. In particular, 112Ba is of great interest owing to possible existence of an α-particle “halo” outside the Z = N = 50 core.
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Ogloblin, A.A., Goncharov, S.A., Belyaeva, T.L. et al. Alpha-particle condensation in nuclei: Experimental problems. Phys. Atom. Nuclei 69, 1149–1154 (2006). https://doi.org/10.1134/S1063778806070088
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DOI: https://doi.org/10.1134/S1063778806070088