A theoretical approach to the problem of partial equilibration in heavy ion reactions

Moretto, L. G.; Sventek, J.

doi:10.1016/0370-2693(75)90718-2

Cited by 100 publications

(76 citation statements)

References 4 publications

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“…A f t e r t h e k i n e t i c energy i s dissipated, Then, t h e time e v o l u t i o n o f t h e popul a t i o n @(Z,t) can be w r i t t e n as [8]:…”

Section: The F I N a L D I S T R I B U T I O N S Depend E X C L U S Imentioning

confidence: 99%

“…Moretto and Sventek [8,11,26) have performed diffusion calculations for some of the reactions studied experimentally. A most important quantity for this calculation is the potential energy of the intermediate complex as a function of Z for each partial R wave.…”

Section: Application Of the Master Equation To The Evaluation Of Crosmentioning

confidence: 99%

“…The sum is carried over all the impact parameters b which result in a particle Z being emitted at the angle 0 after a time t. The quantity II(t,b) is the probability that the intermediate complex characterized by an impact parameter b will live a time t. This expression is very general and it implies a complicated folding over unknown deflection functions. It is possible to obtain reasonable results if, as done by Moretto and Sventek [8,11] and by Sventek and Moretto [26], one assumes rigid rotation of the complex with a moment of inertia suitably averaged between the entrance channel and the exit channel asymmetry. In the former paper, where the calculation was performed for lighter systems, a statistical time distribution was used:…”

Section: Application Of the Master Equation To The Evaluation Of Crosmentioning

confidence: 99%

“…8 because of the relatively narrow window in impact parameters leading to deep inelastic collisions in that reaction. Examples of the calculation for Kr + Au are shown in Figs.…”

Section: Application Of the Master Equation To The Evaluation Of Crosmentioning

confidence: 99%

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Experimental Evidence and Physical Implications of the Time Evolution Along the Mass Asymmetry Mode in Heavy Ion Reactions

Moretto

Schmitt

1976

J. Phys. Colloques

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“…A f t e r t h e k i n e t i c energy i s dissipated, Then, t h e time e v o l u t i o n o f t h e popul a t i o n @(Z,t) can be w r i t t e n as [8]:…”

Section: The F I N a L D I S T R I B U T I O N S Depend E X C L U S Imentioning

confidence: 99%

Section: Application Of the Master Equation To The Evaluation Of Crosmentioning

confidence: 99%

Section: Application Of the Master Equation To The Evaluation Of Crosmentioning

confidence: 99%

“…8 because of the relatively narrow window in impact parameters leading to deep inelastic collisions in that reaction. Examples of the calculation for Kr + Au are shown in Figs.…”

Section: Application Of the Master Equation To The Evaluation Of Crosmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Evidence and Physical Implications of the Time Evolution Along the Mass Asymmetry Mode in Heavy Ion Reactions

Moretto

Schmitt

1976

J. Phys. Colloques

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“…Several models have been proposed and used for the description of mass transfer in deep inelastic heavy ion collisions, namely, the Focker-Planck [10] and master equations [11] for the corresponding distribution function, the Langevin equations [12], and more sophisticated semiclassical approaches [13][14][15]. The well known GRAZING code [16] for description of nucleon transfer reactions in heavy ion collisions is also available on the market (recently it becomes possible to run this code directly at the NRV web-site [17]).…”

Section: The Modelmentioning

confidence: 99%

Production and study of new neutron rich heavy nuclei in multinucleon transfer reactions

Zagrebaev

Greiner

2013

EPJ Web of Conferences

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Abstract. Problems of production and study of new neutron-enriched heavy nuclei are discussed. Lowenergy multinucleon transfer reactions are shown to be quite appropriate for this purpose. Reactions with actinide beams and targets are of special interest for synthesis of new neutron-enriched transfermium nuclei and not-yet-known nuclei with closed neutron shell N = 126 having the largest impact on the astrophysical r-process. The estimated cross sections for the production of these nuclei look very promising for planning such experiments at currently available accelerators. These experiments, however, are rather expensive and difficult to perform because of low intensities of the massive projectile beams and problems of separating and detecting the heavy reaction products. Thus, realistic predictions of the corresponding cross sections for different projectile-target combinations are definitely required. Some uncertainty still remains in the values of several parameters used for describing the low-energy nuclear dynamics. This uncertainty does not allow one to perform very accurate predictions for the productions of new heavier-than-target (trans-target) nuclei in multinucleon transfer reactions. Nevertheless these predictions are rather promising (large cross sections) to start such experiments at available accelerators if the problem of separation of heavy transfer reaction products would be solved. MotivationThe upper part of the present-day nuclear map consists mainly of proton rich nuclei, while the unexplored area of heavy neutron enriched nuclides (also those located along the neutron closed shell N = 126 to the right-hand side of the stability line) is extremely important for nuclear astrophysics investigations and, in particular, for the understanding of the r process of astrophysical nucleogenesis. For elements with Z > 100 only neutron deficient isotopes (located to the left of the stability line) have been synthesized so far. Due to the bending of the stability line toward the neutron axis, in fusion reactions only proton-rich isotopes of heavy elements can be produced. That is the main reason for the impossibility of reaching the center of the island of stability (Z ∼ 110 ÷ 120 and N ∼ 184) in the superheavy (SH) mass region by fusion reactions with stable projectiles. Because of that we also have almost no information about neutron-rich isotopes of heavy elements located in the "northeast" part of the nuclear map: for example, there are 19 known neutron-rich isotopes of cesium (Z = 55) and only 4 of platinum (Z = 78) (see Fig. 1). Thus, the whole "northeast" area of the nuclear map is still terra incognita. Production and studying properties of nuclei located in this region will open a new field of research in nuclear physics. a e-mail: zagrebaev@jinr.ru b e-mail: greiner@fias.uni-frankfurt.de There are only three methods for the production of heavy elements, namely, fusion reactions, a sequence of neutron capture and β − decay processes and multi-nucleon transfer reactions. Fusion ReactionsFusion...

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Macroscopic description of heavy-ion reactions

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Nuclear Interactions

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A theoretical approach to the problem of partial equilibration in heavy ion reactions

Cited by 100 publications

References 4 publications

Experimental Evidence and Physical Implications of the Time Evolution Along the Mass Asymmetry Mode in Heavy Ion Reactions

Experimental Evidence and Physical Implications of the Time Evolution Along the Mass Asymmetry Mode in Heavy Ion Reactions

Production and study of new neutron rich heavy nuclei in multinucleon transfer reactions

Macroscopic description of heavy-ion reactions

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