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Deformed Potential Energy of 263Db in a Generalized Liquid Drop Model |
| CHEN Bao-Qiu1,2;MA Zhong-Yu1,2,3;Zhao Yao-Lin2 |
| 1Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000
2China Institute of Atomic Energy, Beijing 102413
3Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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CHEN Bao-Qiu, MA Zhong-Yu, Zhao Yao-Lin 2003 Chin. Phys. Lett. 20 1936-1939 |
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Abstract The macroscopic deformed potential energy for super-heavy nuclei 263Db, which governs the entrance and alpha decay channels, is determined within a generalized liquid drop model (GLDM). A quasi-molecular shape is assumed in the GLDM, which includes the volume-, surface-, and Coulomb-energies, the proximity effects, the mass asymmetry, and an accurate nuclear radius. The microscopic single particle energies are derived from a shell model in an axially deformed Woods-Saxon potential with the quasi-molecular shape. The shell correction is calculated by the Strutinsky method. The total deformed potential energy of a nucleus can be calculated by the macro-microscopic method as the summation of the liquid-drop energy and the Strutinsky shell correction. The theory is applied to predict the deformed potential energy of the experiment 22DNe + 241Am → 263Db* → 259Db + 4n, which was performed on the Heavy Ion Accelerator in Lanzhou. It is found that the neck in the quasi-molecular shape is responsible for the deep valley of the fusion barrier due to the shell corrections. In the cold fusion path, the double-hump fusion barrier is predicted by the shell correction and complete fusion events may occur.
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| Keywords:
25.60.Pj
25.70.Jj
27.90.+b
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Published: 01 November 2003
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