Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-01-11
Eur.Phys.J. A28 (2006) 259-263
Physics
Nuclear Physics
Nuclear Theory
5 pages, 10 figures, submitted to Phys. Rev. C (R)
Scientific paper
10.1140/epja/i2006-10061-5
In order to discuss the spatial extention of the second 0+ state of 12C (Hoyle state), we analyze the inelastic form factor of electron scattering to the Hoyle state, which our 3 alpha condensate wave function reproduces very well like previous 3 alpha RGM/GCM models. The analysis is made by varying the size of the Hoyle state artificially. As a result, we find that only the maximum value of the form factor sensitively depends on its size, while the positions of maximum and minimum are almost unchanged. This size dependence is found to come from a characteristic feature of the transition density from the ground state to the Hoyle state. We further show the theoretical predictions of the inelastic form factor to the second 2+ state of 12C, which was recently observed above the Hoyle state, and of the inelastic form factor to the calculated third 0+ state of 16O, which was conjectured to correspond to the 4 alpha condensed state in previous theoretical work by the present authors.
Funaki Yasuro
Horiuchi Hiroki
Roepke Gerd
Schuck Peter
Tohsaki Akihiro
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