Cold and Spontaneous Fission Fragments Mass Yield of 252Cf using the statistical scission point model with the pairing energy and temperature dependent shell energy corrections

The photofission fragment mass yields of actinides are evaluated using a systematic statistical scission point model. In this model, all energies at the scission point are presented as a linear function of the mass numbers of fission fragments. The mass yields are calculated with a new approximated relative probability for each complementary fragment. The agreement with the experimental data is quite good, especially with a collective temperature Tcol of 2 MeV at intermediate excitation energy and Tcol = 1 MeV for spontaneous fission. This indicates that the collective temperature is greater than the value obtained by the initial excitation energy. The generalized superfluid model is applied for calculating the fragment temperature. The deformation parameters of fission fragments have been obtained by fitting the calculated results with the experimental values. This indicates that the deformation parameters decrease with increasing excitation energy. Also, these parameters decrease for fissioning systems with odd mass numbers.

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Charge/mass yields in the fission of highly excited heavy actinides

EPJ Web of Conferences ◽

10.1051/epjconf/201819406004 ◽

2018 ◽

Vol 194 ◽

pp. 06004

Author(s):

H. Paşca ◽

A.V. Andreev ◽

G.G. Adamian ◽

N.V. Antonenko

Keyword(s):

Experimental Data ◽

Excitation Energy ◽

Charge Distribution ◽

High Energy ◽

Mass Yield ◽

Charge Mass ◽

Scission Point ◽

Mass Distributions ◽

Fission Fragments ◽

Critical Excitation

The charge (mass) distributions of fission fragments resulting from low- and high-energy fission of the isotopes of Fm and No are studied with the statistical scission-point fission model. The calculated results are compared with the available experimental data. The transformation of the shape of the charge distribution with increasing isospin and excitation energy occurs gradually. At some critical excitation energy the the saturation of the symmetric component of the charge (mass) yield is demonstrated.

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Role of the excitation energy of the compound nucleus in binary decay processes

EPJ Web of Conferences ◽

10.1051/epjconf/201816900015 ◽

2018 ◽

Vol 169 ◽

pp. 00015

Author(s):

H. Paşca ◽

A.V. Andreev ◽

G.G. Adamian ◽

N.V. Antonenko

Keyword(s):

Excitation Energy ◽

Charge Distribution ◽

Compound Nucleus ◽

High Excitation ◽

Point Model ◽

Excitation Energies ◽

Scission Point ◽

Fission Fragments

Employing the improved scission-point model, the isotopic and excitation energy trends of the charge distribution of fission fragments are studied in fission of even-even Th isotopes at low and high excitation energies.

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