Odd-even effect dependence on the excitation energy in low energy fission

An inversion of the odd-even effect was observed experimentally in cold fission: the odd-odd fragmentation yields are favored over the even-even ones for excitations energies of the fragments smaller than 4 MeV. This effect is linked to the important problem of quasiparticle excitations during the d...

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Main Author:	Mirea M.
Format:	Article
Language:	English
Published:	EDP Sciences 2017-01-01
Series:	EPJ Web of Conferences
Online Access:	https://doi.org/10.1051/epjconf/201714604015

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spelling	doaj-e4328b46d82c4457b8b185e1dea0a5492021-08-02T08:19:34ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011460401510.1051/epjconf/201714604015epjconf-nd2016_04015Odd-even effect dependence on the excitation energy in low energy fissionMirea M.An inversion of the odd-even effect was observed experimentally in cold fission: the odd-odd fragmentation yields are favored over the even-even ones for excitations energies of the fragments smaller than 4 MeV. This effect is linked to the important problem of quasiparticle excitations during the dynamical evolution of the nuclear system from its ground-state configuration up to scission. An explanation based on the Landau-Zener promotion mechanism generalized for superfluid systems is offered for the inversion of the odd-even effect. In principle, the even-even fission products cannot be produced at very low excitation energies due dynamical quasiparticle excitations produced in the avoided- level-crossing regions. These excitations are produced with a large probability when the nuclear system deforms slowly.https://doi.org/10.1051/epjconf/201714604015
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Mirea M.
spellingShingle	Mirea M. Odd-even effect dependence on the excitation energy in low energy fission EPJ Web of Conferences
author_facet	Mirea M.
author_sort	Mirea M.
title	Odd-even effect dependence on the excitation energy in low energy fission
title_short	Odd-even effect dependence on the excitation energy in low energy fission
title_full	Odd-even effect dependence on the excitation energy in low energy fission
title_fullStr	Odd-even effect dependence on the excitation energy in low energy fission
title_full_unstemmed	Odd-even effect dependence on the excitation energy in low energy fission
title_sort	odd-even effect dependence on the excitation energy in low energy fission
publisher	EDP Sciences
series	EPJ Web of Conferences
issn	2100-014X
publishDate	2017-01-01
description	An inversion of the odd-even effect was observed experimentally in cold fission: the odd-odd fragmentation yields are favored over the even-even ones for excitations energies of the fragments smaller than 4 MeV. This effect is linked to the important problem of quasiparticle excitations during the dynamical evolution of the nuclear system from its ground-state configuration up to scission. An explanation based on the Landau-Zener promotion mechanism generalized for superfluid systems is offered for the inversion of the odd-even effect. In principle, the even-even fission products cannot be produced at very low excitation energies due dynamical quasiparticle excitations produced in the avoided- level-crossing regions. These excitations are produced with a large probability when the nuclear system deforms slowly.
url	https://doi.org/10.1051/epjconf/201714604015
work_keys_str_mv	AT miream oddeveneffectdependenceontheexcitationenergyinlowenergyfission
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Odd-even effect dependence on the excitation energy in low energy fission

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