Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-07-10
Prog.Theor.Phys. 108 (2002) 297-322
Physics
Nuclear Physics
Nuclear Theory
20 pages, 14 EPS figures
Scientific paper
10.1143/PTP.108.297
In order to study non-zero spin excitations of the recently proposed alpha-cluster condensation in the self-conjugate 4n nuclei, spatial deformation is introduced into the model wave function of the alpha-cluster condensate. The rotational band states of 8Be are investigated as a first step of a test case for the study of the deformation of the alpha-cluster condensate. Calculations reproduce well the binding energy of the 0+ ground state and also the excitation energy of the 2+ state. Our 0+ wave function is found to be almost exactly equal to the 0+ wave function obtained by the generator coordinate method using Brink's 2 alpha wave function. The study shows that both the 0+ ground and 2+ excited states can be considered as having a gas-like (i.e. weakly bound) 2 alpha-cluster structure. As for the 0+ ground state, the change of the wave function, due to the introduction of the deformation, is found to be very small.
Funaki Yasuro
Horiuchi Hisashi
Röpke Gerd
Schuck Peter
Tohsaki Akihiro
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