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Time-odd effects and the spectroscopic properties of odd-mass fission fragments

Abstract : Adding an extra nucleon having a definite K-value to an axially symmetrical even-even core generates a breaking of the time-reversal symmetry. Within the Skyrme-Hartree-Fock approach the effects of the time-odd mean-field terms resulting from the presence of non-vanishing current and spin-vector densities are investigated. In this preliminary study, pairing correlations are not taken into account. The associated removal of the Kramers degeneracy is interpreted in terms of diamagnetic/paramagnetic types of polarization of the even-even core in the field of an odd particle. This general approach is illustrated here by calculations in the region of light fragments of heavy (e.g. actinide) nuclei.
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Submitted on : Thursday, January 28, 2010 - 11:07:51 AM
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P. Quentin, N. Minkov, L. Bonneau, D. Samsoen. Time-odd effects and the spectroscopic properties of odd-mass fission fragments. 4th International Workshop on Nuclear Fission-product Spectroscopy, May 2009, Saint Paul lez Durance, France. pp.174-181, ⟨10.1063/1.3258220⟩. ⟨in2p3-00451091⟩



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