Monopole excitations of the <sup>12</sup>C nucleus in the cluster model
T Ya Mikhelashvili; A M Shirokov; Yu F Smirnov; T Ya Mikhelashvili; Inst. of Phys., Acad. of Sci., Tbilisi, Georgian SSR, USSR; A M Shirokov; Inst. of Phys., Acad. of Sci., Tbilisi, Georgian SSR, USSR; Yu F Smirnov; Inst. of Phys., Acad. of Sci., Tbilisi, Georgian SSR, USSR
Журнал:
Journal of Physics G: Nuclear and Particle Physics
Дата:
1990-08-01
Аннотация:
The monopole excitations of the <sup>12</sup>C nucleus are studied in the 3 alpha -cluster model. The 3 alpha -continuum is taken into account by means of scattering theory in the harmonic oscillator representation. Only the 'true' three-body scattering is considered. The role of the continuum is essential. Particularly, at excitation energies between 12-25 MeV, instead of a number of sharp resonances, a single smooth resonance on a broad pedestal arises. This pedestal may be easily misinterpreted as a 'background' in experimental studies.
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