Partition of excitation energy between reaction products in heavy ion collisions

Adamian, G. G.; Jolos, R. V.; Nasirov, A. K.

doi:10.1007/bf01292377

Cited by 20 publications

(15 citation statements)

References 33 publications

(27 reference statements)

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“…With the DNS concept a number of features of deep inelastic transfer reactions, fusion of nucleus, fission, quasifission, fusion-fission and fast fission [9,11,12] can be well explained.…”

Section: Theoretical Modelmentioning

confidence: 99%

Collinear cluster tripartition as sequential binary fission in the 235U(nth, f ) reaction

2011

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The mechanism leading to the formation of the observed products of the collinear cluster tripartition is carried out within the framework of the model based on the dinuclear system concept. The yield of fission products is calculated using the statistical model based on the driving potentials for the fissionable system. The minima of potential energy of the decaying system correspond to the charge numbers of the products which are produced with large probabilities in the sequential fission (partial case of the collinear cluster tripartition) of the compound nucleus. The realization of this mechanism supposes the asymmetric fission channel as the first stage of sequential mechanism. It is shown that only the use of the driving potential calculated by the binding energies with the shell correction allows us to explain the yield of the true ternary fission products. The theoretical model is applied to research collinear cluster tripartition in the reaction 235 U(n th ,f). Calculations showed that in the first stage of this fission reaction, the isotopes 82 Ge and 154 Nd are formed with relatively large probabilities and in the second stage of sequential fission of the isotope Nd mainly Ni and Ge are formed. This is in agreement with the yield of the isotope 68 Ni which is observed as the product of the collinear cluster tripartition in the experiment.

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“…With the DNS concept a number of features of deep inelastic transfer reactions, fusion of nucleus, fission, quasifission, fusion-fission and fast fission [9,11,12] can be well explained.…”

Section: Theoretical Modelmentioning

confidence: 99%

Collinear cluster tripartition as sequential binary fission in the 235U(nth, f ) reaction

2011

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“…W Z,A (E CN *, J), is the probability of emission of a given cluster with characteristics Z and A. This quantity is obtained from the stationary solution of the master equation with respect to charge and mass asymmetries [37,38] and is given by [24]:…”

Section: Charged Particle Emission Cross-sectionmentioning

confidence: 99%

Effect of surface energy constant and surface asymmetry constant in the charged particle emission cross-section for the reactions $$ ^{78,82,86} Kr +^{12} C $$ 78 , 82 , 86 K r + 12 C

Nazarzadeh

Davoodabadi

2016

Indian J Phys

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The effects of the surface energy constant and the surface asymmetry constant in the charged particle emission cross section, have been examined by using the proximity potentials Prox77, BW91, AW95. The charged particle emission cross-section for the reactions 78;82;86 Kr þ 12 C have been calculated. Good consistency between the results of this work and the experimental data have been obtained using appropriate values of these constants.

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“…A nonequilibrium distribution of the excitation energy between the fragments was taken into account in calculations of the single-particle occupation numbers n P and n T as it was done in Ref. [29]; ε P Z andε T Z are perturbed energies of single-particle states. In Eq.…”

Section: Calculation Of Competition Between Quasifission and Completementioning

confidence: 99%

Investigation on the quasifission process by theoretical analysis of experimental data of fissionlike reaction products

Giardina

Nasirov

Mandaglio

et al. 2011

J. Phys.: Conf. Ser.

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The fusion excitation function is the important quantity in planning experiments for the synthesis of superheavy elements. Its values seem to be determined by the experimental study of the hindrance to complete fusion by the observation of mass, angular and energy distributions of the fissionlike fragments. There is ambiguity in establishment of the reaction mechanism leading to the observed binary fissionlike fragments. The fissionlike fragments can be produced in the quasifission, fast fission, and fusion-fission processes which have overlapping in the mass (angular, kinetic energy) distributions of fragments. The branching ratio between quasifission and complete fusion strongly depends on the characteristics of the entrance channel. In this paper we consider a wide set of reactions (with different mass asymmetry and mass symmetry parameters) with the aim to explain the role played by many quantities on the reaction mechanisms. We also present the results of study of the 48 Ca+ 249 Bk reaction used to synthesize superheavy nuclei with Z = 117 by the determination of the evaporation residue cross sections and the effective fission barriers < B f > of excited nuclei formed along the de-excitation cascade of the compound nucleus.

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Partition of excitation energy between reaction products in heavy ion collisions

Cited by 20 publications

References 33 publications

Collinear cluster tripartition as sequential binary fission in the 235U(nth, f ) reaction

Collinear cluster tripartition as sequential binary fission in the 235U(nth, f ) reaction

Effect of surface energy constant and surface asymmetry constant in the charged particle emission cross-section for the reactions $$ ^{78,82,86} Kr +^{12} C $$ 78 , 82 , 86 K r + 12 C

Investigation on the quasifission process by theoretical analysis of experimental data of fissionlike reaction products

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