Systematic study of structure of carbon isotopes with the antisymmetrized molecular dynamics plus generator coordinate method

Author： Thiamova G.

Publisher： Springer Publishing Company

ISSN： 1434-6001

Source： The European Physical Journal A - Hadrons and Nuclei, Vol.22, Iss.3, 2004-12, pp. : 461-470

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Abstract

The structure of low-lying states of the carbon isotopes is investigated using the improved version of the Antisymmetrized Molecular Dynamics (AMD) Multi-Slater Determinant model. The theoretical method is found to be very useful to study ground-state properties of various nuclei covering light unstable nuclei. The calculations succeed to reproduce reasonably well many experimental data for the carbon isotopes ¹²C- ²²C such as binding energies, the energies of the 2⁺₁ states in the even-even isotopes, radii and electromagnetic transition strengths. We investigate the structure change with the increasing neutron number and observe the existence of various exotic phenomena, like the development of a neutron skin and large deformations which appear in unstable nuclei. Our calculations clearly support the existence of the N = 8 and N = 16 neutron magic numbers. The role of the spin-orbit interaction in the description of the studied isotopes and in the development of cluster structures is discussed. A special approach, important for weakly bound systems, is adopted for ¹⁵C. It enables us to better describe the tail of the wave function.