Production of Nuclei Far From Stability

Volkov, Vadim

doi:10.1007/978-1-4613-0713-6_2

Cited by 14 publications

(8 citation statements)

References 94 publications

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“…Discovery and investigation of deep inelastic trans fer reactions (DITRs) [1][2][3][4], in which a total dissipa tion of kinetic energy of collision occurs, made it pos sible to find a new approach to a mechanism of two nuclei interaction. The dinuclear system (DNS) that forms in these reactions participates simultaneously in two nuclear processes.…”

Section: Dinuclear Systems In Nuclear Reactionsmentioning

confidence: 99%

“…It evolves in coordinate of mass (charge) asymmetry and at the same time may break down into two fragments from all intermediate config urations. Studying the charge, mass, and energy distri butions of DITR products for different escape angles, which corresponds to different lifetimes of a DNS, it is possible to gain a complete impression of regularities of its evolution [1][2][3][4][5][6]. The DITRs were successfully applied to producing isotopes of nuclei far from the stability line.…”

Section: Dinuclear Systems In Nuclear Reactionsmentioning

confidence: 99%

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Dinuclear systems in complete fusion reactions

2014

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Formation and evolution of dinuclear systems in reactions of complete fusion are considered. Based on the dinuclear system concept, the process of compound nucleus formation is studied. Arguments confirming the validity of this concept are given. The main problems of describing the complete fusion in adi abatic approximation are listed. Calculations of evaporation residue cross sections in complete fusion reac tions leading to formation of superheavy nuclei are shown. Isotopic trends of the cross sections of heavy nuclei formation in complete fusion reactions are considered.

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Section: Dinuclear Systems In Nuclear Reactionsmentioning

confidence: 99%

Section: Dinuclear Systems In Nuclear Reactionsmentioning

confidence: 99%

Dinuclear systems in complete fusion reactions

2014

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“…At the final stage the excited fragments are de-excited by particle emission resulting in the observed reaction products. This process is very similar to deep inelastic transfer reactions taking place at lower energies (see for example [4][5][6][7]) but in our case a full dissipation of the relative kinetic energy is not assumed. Of course for higher energies, the division of reaction into these stages can be considered as the first approximation and the complete study of whole reaction dynamics is preferable.…”

Section: A Model Assumptionsmentioning

confidence: 84%

“…The single-particle occupation numbers n P (Θ P ) and n T (Θ T ) depend on the thermodynamical temperatures Θ P and Θ T in the projectile-like and target-like nuclei, respectively. Solving (8) with (9) at the initial conditions P ZN (E * , 0) = δ Z,Z P δ N,N P and E * = E * (J , E kin ), the primary isotope distributions are found for the certain interaction time t int keeping in mind the relation (7). Since the collisions with small interaction times ∼ 10 −21 s is mainly considered here, the equal sharing of excitation energy between the parts of the dinuclear system is used in accordance with the results of the previous subsection.…”

Section: Charge-mass Distribution Of Primary Fragmentsmentioning

confidence: 99%

Towards exotic nuclei via binary reaction mechanism

et al. 1998

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Assuming a binary reaction mechanism, the yield of isotopes near the heaviest $N=Z$ neutron-deficit nucleus $^{100}$Sn is studied with a microscopic transport model. The large influence of nuclear shell structure and isotope composition of the colliding nuclei on the production of exotic nuclei is demonstrated. It is shown that the reaction $^{54}$Fe+$^{106}$Cd seems to be most favourable for producing primary exotic Sn isotopes which may survive if the excitation energy in the entrance reaction channel is less than about 100 MeV. In the case of large differences in the charge (mass) numbers between entrance and exit channels the light fragment yield is essentially fed from the decay of excited primary heavier fragments. The existence of optimal energies for the production of some oxygen isotopes in the binary mechanism is demonstrated for the $^{32}$S+$^{197}$Au reaction.Comment: 17 pages, RevTex, 8 Postscript figures, submitted to Phys. Rev.

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“…Experimentalists have had a long-standing interest in multi-nucleon transfer reactions [1,2] hoping to synthesize new neutron-rich isotopes not normally accessible by neutron capture and fusion reactions [3][4][5][6][7][8][9]. Cross sections of actinides produced in transfer reactions using light and heavy projectiles and actinide targets were measured by the chemical separation of the products in a series of experiments in the late 70's and 80's.…”

Section: Introductionmentioning

confidence: 99%

Predicting the production of neutron-rich heavy nuclei in multinucleon transfer reactions using a semi-classical model including evaporation and fission competition, GRAZING-F

Yáñez

Loveland

2015

Phys. Rev. C

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Background: Multi-nucleon transfer reactions have recently attracted attention as a possible path to the synthesis of new neutron-rich heavy nuclei.Purpose: We study transfer reactions involving massive nuclei with the intention of understanding if the semi-classical model GRAZING coupled to an evaporation and fission competition model can satisfactory reproduce experimental data on transfer reactions in which fission plays a role. Methods:We have taken the computer code GRAZING and have added fission competition to it (GRAZING-F) using our current understanding of Γ n /Γ f , fission barriers and level densities. Results:The code GRAZING-F seems to satisfactory reproduce experimental data for +1p, +2p and +3p transfers, but has limitations in reproducing measurements of larger above-target and below-target transfers. Nonetheless, we use GRAZING-F to estimate production rates of neutron-rich N = 126 nuclei, actinides and transactinides. Conclusions:The GRAZING code, with appropriate modifications to account for fission decay as well as neutron emission by excited primary fragments, does not predict large cross sections for multi-nucleon transfer reactions leading to neutron-rich transactinide nuclei, but predicts opportunities to produce new neutron-rich actinide isotopes.

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Production of Nuclei Far From Stability

Cited by 14 publications

References 94 publications

Dinuclear systems in complete fusion reactions

Dinuclear systems in complete fusion reactions

Towards exotic nuclei via binary reaction mechanism

Predicting the production of neutron-rich heavy nuclei in multinucleon transfer reactions using a semi-classical model including evaporation and fission competition, GRAZING-F

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