Collective spectra along the fission barrier

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

doi:10.1051/epjconf/20123807001

Collective spectra along the fission barrier

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

Nuclear Data

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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 language	English
Article number	07001
Journal	EPJ Web of Conferences
Volume	38
DOIs	https://doi.org/10.1051/epjconf/20123807001
State	Published - 2012
Event	6th International Conference on Nuclear Structure and Related Topics, NSRT 2012 - Dubna, Russian Federation Duration: Jul 3 2012 → Jul 7 2012

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title = "Collective spectra along the fission barrier",

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.",

author = "Shneidman, {T. M.} and Andreev, {A. V.} and Pigni, {M. T.} and C. Massimi and G. Vannini and A. Ventura",

year = "2012",

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language = "English",

volume = "38",

journal = "EPJ Web of Conferences",

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note = "6th International Conference on Nuclear Structure and Related Topics, NSRT 2012 ; Conference date: 03-07-2012 Through 07-07-2012",

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T1 - Collective spectra along the fission barrier

AU - Shneidman, T. M.

AU - Andreev, A. V.

AU - Pigni, M. T.

AU - Massimi, C.

AU - Vannini, G.

AU - Ventura, A.

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

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DO - 10.1051/epjconf/20123807001

M3 - Conference article

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SN - 2101-6275

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JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

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T2 - 6th International Conference on Nuclear Structure and Related Topics, NSRT 2012

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Collective spectra along the fission barrier

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