Alpha clustering and nuclear molecules in 8 Be, 12 C, 16 O, 20 Ne, 24 Mg, and 32 S

Clusters d'alpha et molécules nucléaires dans 8 Be, 12 C, 16 O, 20 Ne, 24 Mg, et 32 S

Guy Royer (1) , Philippe Eudes (1)

1 SUBATECH - Laboratoire SUBATECH Nantes

Within a liquid drop model the energy of the 12 C, 16 O, 20 Ne, 24 Mg and 32 S 4n-nuclei has been calculated within different configurations of α-molecules : linear chain, triangle, square, tetrahedron, pentagon, trigonal bipyramid, square pyramid, hexagon, octahedron, octagon and cube. The potential barriers governing the decay and entrance channels via α emission or absorption as well as the potential barriers of other possible binary and ternary reactions have been compared. The rms radii of the linear chains do not correspond to the experimental rms radii of the ground states. The binding energies of the three-dimensional molecules at the nascent point of the fragments are higher than the ones of the planar configurations. The A-4 daughter plus α particle configurations have always the lowest potential energy.

Mots clés: alpha clusters; 8Be; 12C; 16O; 20Ne; 24Mg; 32S; generalized liquid drop model; proximity energy; nuclear molecules

Domaines: Physique [physics]

Guy Royer, Philippe Eudes. Alpha clustering and nuclear molecules in 8 Be, 12 C, 16 O, 20 Ne, 24 Mg, and 32 S. 11th International Conference on Clustering Aspects of Nuclear Structure and Dynamics , University of Napoli Italy, May 2016, Napoli, Italy. pp.012012, ⟨10.1088/1742-6596/863/1/012012⟩. ⟨hal-01557468⟩