Alpha particle condensation and nuclear rainbow scattering
It is shown that a dilute property of an $α$ particle condensate can be seen in the Airy structure of nuclear rainbow and prerainbow scattering. The dilute property of the Hoyle state of $^{12}$C with a developed $α$ cluster structure is discussed by studying refractive $^3$He+$^{12}$C and $α$+$^{12}$C scattering.
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