Evidence for strong refraction of ${}^3$He in an alpha-particle condensate

Abstract

We have analyzed ${}^3$He scattering from ${}^{12}$C at 34.7 and 72 MeV in a coupled channel method with a double folding potential derived from the precise wave functions for the ground 0${}^{+}$ state and $0_2^{+}$ (7.65 MeV) Hoyle state, which has been suggested to be an $\alpha$ particle condensate. It is found that strong refraction of ${}^3$He in the Hoyle state can be clearly seen in the experimental angular distribution at {\it low} incident energy region as an Airy minimum of the {\it pre-rainbow oscillations}.

References in corpus (5)

• Alpha cluster condensation in 12C and 16O
• Four-particle condensate in strongly coupled fermion systems
• Analysis of previous microscopic calculations for second $0^{+}$ state in ${}^{12}$C in terms of 3-alpha particle Bose-condensed state
• $2\alpha +t$ cluster structure in ${}^{11}$B
• Molecular-orbital structure in neutron-rich C isotopes

Cited by in corpus (14)

• Status of Alpha-Particle Condensate Structure of the Hoyle State
• Microscopic study of 4-alpha-particle condensation with proper treatment of resonances
• $\alpha$-particle condensate states in ${}^{16}$O
• Missing monopole strength of the Hoyle state in the inelastic $\alpha$+${}^{12}$C scattering
• Nuclear Alpha-Particle Condensates
• Observation of Airy minimum in elastic and inelastic scattering of ${}^3$He from ${}^{12}$C at 50.5 and 60 MeV and alpha particle condensation in ${}^{12}$C
• Unification of Airy structure in inelastic $\alpha$ +${}^{16}$O scattering and $\alpha$-cluster structure with core excitation in ${}^{20}$Ne
• Refractive effects and Airy structure in inelastic ${}^{16}$O+${}^{12}$C rainbow scattering
• Further evidence for a dynamically generated secondary bow in ${}^{13}$C+${}^{12}$C rainbow scattering
• Alpha particle condensation and nuclear rainbow scattering
• Existence of inelastic supernumerary nuclear rainbow in ${}^{16}$O+${}^{12}$C scattering
• Evidence for a dynamically refracted primary bow in weakly bound ${}^9$Be rainbow scattering from ${}^{16}$O
• Secondary bow with ripples in ${}^{12}$C+${}^{12}$C rainbow scattering
• Systematics of supernumerary nuclear rainbow in inelastic ${}^{16}$O+${}^{12}$C scattering