Fission properties of Po isotopes in different macroscopic–microscopic models

Abstract : Fission-barrier heights of nuclei in the Po isotopic chain are investigated in several macroscopic– microscopic models. Using the Yukawa-folded single-particle potential, the Lublin–Strasbourg drop (LSD) model, the Strutinsky shell-correction method to yield the shell corrections and the BCS theory for the pairing contributions, fission-barrier heights are calculated and found in quite good agreement with the experimental data. This turns out, however, to be only the case when the underlying macroscopic, liquid-drop (LD) type, theory is well chosen. Together with the LSD approach, different LD parametrizations proposed by Moretto et al are tested. Four deformation parameters describing respectively elongation, neck-formation, reflectionalasymmetric, and non-axiality of the nuclear shape thus defining the so called modified Funny Hills shape parametrization are used in the calculation. The present study clearly demonstrates that nuclear fission-barrier heights constitute a challenging and selective tool to discern between such different macroscopic approaches.
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Submitted on : Wednesday, January 20, 2016 - 11:40:00 AM
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J. Bartel, K. Pomorski, B. Nerlo-Pomorska, C. Schmitt. Fission properties of Po isotopes in different macroscopic–microscopic models. Physica Scripta, IOP Publishing, 2015, 90 (11), pp.114004. ⟨10.1088/0031-8949/90/11/114004⟩. ⟨in2p3-01259295⟩

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