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On the liquid drop model mass formulas and alpha decay of the heaviest nuclei

Abstract : The coefficients of different macro-microscopic Liquid Drop Model mass formulas have been determined by a least square fitting procedure to 2027 experimental atomic masses. A rms deviation of 0.54 MeV can be reached. The remaining differences come mainly from the determination of the shell and pairing energies. Extrapolations are compared to 161 new experimental masses and to 656 mass evaluations. The different fits lead to a surface energy coefficient of around 17-18 MeV. Finally, alpha decay potential barriers are revisited and predictions of alpha decay half-lives of still unknown superheavy elements are given from previously proposed analytical formulas and from extrapolated Qalpha values.
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  • HAL Id : in2p3-00494926, version 1

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G. Royer, M. Guilbaud, A. Onillon, H.F. Zhang. On the liquid drop model mass formulas and alpha decay of the heaviest nuclei. 12th International Conference on nuclear reaction mechanisms, Jun 2009, Varenna, Italy. pp.259-266. ⟨in2p3-00494926⟩

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