Collective spectra along the fission barrier

T. M. Shneidman, A. V. Andreev, M. T. Pigni, C. Massimi, G. Vannini, A. Ventura

Research output: Contribution to journalConference articlepeer-review

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Abstract

Discrete and continuous spectra of fissioning nuclei at the humps of fission barriers (Bohr transition states) and in the intermediate wells (superdeformed and hyperdeformed states) play a key role in the calculation of fission cross sections. A theoretical evaluation of the collective parts of the spectra is possible within the framework of the dinuclear system model, which treats the wave function of the fissioning nucleus as a superposition of a mononucleus configuration and two-cluster configurations in a dynamical way, permitting exchange of upper-shell nucleons between clusters. The impact of theoretical spectra on neutron-induced fission cross sections and, in combination with an improved version of the scission-point model, on angular distribution of fission fragments is evaluated for plutonium isotopes of interest to nuclear energy applications.

Original languageEnglish
Article number07001
JournalEPJ Web of Conferences
Volume38
DOIs
StatePublished - 2012
Event6th International Conference on Nuclear Structure and Related Topics, NSRT 2012 - Dubna, Russian Federation
Duration: Jul 3 2012Jul 7 2012

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