The scission point configuration of fissioning nuclei

Ivanyuk, F. A.

doi:10.1051/epjconf/201612201002

Cited by 8 publications

(6 citation statements)

References 31 publications

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“…This model has been developed in many branches, such as the Gaussian model [3,4] and modified scission point models [6][7][8][9][10][11][12][13]. The time-dependent model has been significantly developed by Randrup [14][15][16] and others [17][18][19][20][21][22] to predict the shape of mass yields (symmetric or asymmetric modes). Because all of them have sophisticated computations, a systematic method is needed to evaluate the mass distribution of fission fragments in an easy way.…”

Section: Introductionmentioning

confidence: 99%

Deformation Parameters and Collective Temperature Changes in Photofission Mass Yields of Actinides Within the Systematic Statistical Scission Point Model

Kaldiani

2021

Front. Phys.

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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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Section: Introductionmentioning

confidence: 99%

Deformation Parameters and Collective Temperature Changes in Photofission Mass Yields of Actinides Within the Systematic Statistical Scission Point Model

Kaldiani

2021

Front. Phys.

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“…None of them has studied the fission of neptunium isotopes. Ivanyuk [37,38] has calculated deformation energy with the two-center shell model parameterization and has estimated TKE and total excitation energy (TXE) of fission fragments in a quasi-static approximation. Some researchers, such as Morariu [39], have calculated TXE using TKE.…”

Section: Introduction 237mentioning

confidence: 99%

Kinetic energy distribution for neutron-induced fission of neptunium isotopes

Kaldiani¹

2021

Chinese Phys. C

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The mean total kinetic energy as a function of fission fragments, the <TKE> distribution, is presented for neutron-induced fission of Np using the scission point model. The calculated results of <TKE> for neutron-induced fission of Np are compared with the available experimental data to obtain the deformation parameters in the scission point model. The deformation parameters of fission fragments are discussed at the scission point. The calculated results are also compared with the results from other methods and with experimental data. The behavior of the <TKE> distribution is then studied for the neutron-induced fission of actinides. This indicates that the <TKE> values for neutron-induced fission of actinides with odd mass numbers are greater than for those with even mass numbers.

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“…These models have been developed in many branches, such as the Gaussian model [3][4][5] and the modified scission point models [7][8][9][10][11][12]. Recently, the time-dependent model has been significantly developed by Randrup [14][15][16] and some researchers [17][18][19][20][21] to evaluate the mass yields of pre-actinides and actinides. However, recent models have sophisticated computations, which indicate the need for a systematic method to more easily evaluate the mass yields of fission fragments.…”

Section: Introductionmentioning

confidence: 99%

Deformation parameter changes in fission mass yields within the systematic statistical scission-point model

Kaldiani¹

2021

Commun. Theor. Phys.

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The fission fragment mass-yields are evaluated for pre-actinide and actinide isotopes using a systematic statistical scission point model. The total potential energy of the fissioning systems at the scission point is presented in approximate relations as functions of mass numbers, deformation parameters and the temperature of complementary fission fragments. The collective temperature, T coll, and the temperature of fission fragments, T i , are separated and the effect of collective temperature on mass yields results is investigated. The fragment temperature has been calculated with the generalized superfluid model. The sum of deformation parameters of complementary fission fragments has been obtained by fitting the calculated results with the experimental data. To investigate the transitions between symmetric and asymmetric modes mass yields for pre-actinide and heavy actinides are calculated with this model. The transition from asymmetric to symmetric fission is well reproduced using this systematic statistical scission point model. The calculated results are in good agreement with the experimental data with T coll = 2 MeV at intermediate excitation energy and with T coll = 1 MeV for spontaneous fission. Despite the Langevin model, in the scission point model, a constraint on the deformation parameters of fission fragments has little effect on the results of the mass yield.

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The scission point configuration of fissioning nuclei

Cited by 8 publications

References 31 publications

Deformation Parameters and Collective Temperature Changes in Photofission Mass Yields of Actinides Within the Systematic Statistical Scission Point Model

Deformation Parameters and Collective Temperature Changes in Photofission Mass Yields of Actinides Within the Systematic Statistical Scission Point Model

Kinetic energy distribution for neutron-induced fission of neptunium isotopes

Deformation parameter changes in fission mass yields within the systematic statistical scission-point model

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