New procedure to determine the mass-angle correlation of quasifission

Schmitt, C.; Mazurek, K.; Nadtochy, P. N.

doi:10.1103/physrevc.100.064606

Cited by 11 publications

(3 citation statements)

References 44 publications

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“…Among these reaction mechanisms quasifission and fusion-fission can be on the order of millibarns, making it easier to study experimentally. However, the extraction of the P CN requires the proper disentangling of quasifission from fusion-fission [87,88,89] as it may be given by…”

Section: Insights From Tdhf and Beyondmentioning

confidence: 99%

Quasifission Dynamics in Microscopic Theories

Godbey

Umar

2020

Front. Phys.

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In the search for superheavy elements quasifission reactions represent one of the reaction pathways that curtail the formation of an evaporation residue. In addition to its importance in these searches quasifission is also an interesting dynamic process that could assist our understanding of many-body dynamical shell effects and energy dissipation thus forming a gateway between deep-inelastic reactions and fission. This manuscript gives a summary of recent progress in microscopic calculations of quasifission employing time-dependent Hartree-Fock (TDHF) theory and its extensions.

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Section: Insights From Tdhf and Beyondmentioning

confidence: 99%

Quasifission Dynamics in Microscopic Theories

Godbey

Umar

2020

Front. Phys.

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“…Recently, we have extended this study for hot fusion reactions [20]. Furthermore, other entrance channel effects, such as target deformation [21] and excitation energy [22], determine the quasifission characteristics [23], which are important factors when choosing a suitable reaction for synthesizing a superheavy element [24]. The role of all these entrance channel effects has been examined explicitly by the experimental evaporation residue (ER) cross-sections of the heavy-ion reactions used for synthesizing SHEs Z = 104-118 successfully, as well as the unfortunate ones which are employed for the SHEs Z = 119-120, so that we can establish certain systematic trends, which in turn allow us to plan the most suitable reaction for a new SHE.…”

Section: Introductionmentioning

confidence: 99%

Rules of thumb for synthesizing superheavy elements

Manjunatha¹,

Vidya²,

Gupta³

et al. 2022

J. Phys. G: Nucl. Part. Phys.

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Synthesizing any elements in the eighth period using either cold or hot fusion reactions remains a big challenge till date. Quasifission mechanism restricts complete fusion to an indeterminably low evaporation residue (ER) cross section for the superheavy nuclei. Entrance channel parameters of the heavy-ion reaction, fission barrier of compound nucleus, deformation parameters of the projectile and target nuclei, and the kinetic energy of the projectile are mostly responsible in governing the scales of the quasifission. Role of these factors has been examined explicitly by the experimental ER cross sections. Thorough comparisons lead us to infer that the entrance channel criteria contribute much lower extent than the deformation parameters do. The effect of deformation can be categorized into four rules as validated by all the reactions used except one $^{45}_{21}$Sc+$^{249}_{98}$Cf $\rightarrow ^{294}_{119}$Uue. Null result from this reaction is well explained by an improper choice of the projectile energy as shown theoretically by means of a statistical model approach, which is valid for a system having a large nucleon number so as to have intrinsically a high density of excited states. Optimal selection of the beam energy sets another rule. Therefore, these five rules can be treated as the rules of thumb for synthesizing the superheavy elements. Application of the first four rules can enable us to spot primarily a suitable reaction and finally exploitation of the fifth rule chooses the most appropriate reaction at a preferable excited energy to achieve the highest ER cross section for a superheavy element.

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“…Furthermore, other entrance channel effects such as target deformation . [18] and excitation energy [19] determine the quasifission characteristics [20], which are the important issues for a reaction to synthesizing a superheavy element [21]. Role of all these entrance channel effects has been examined explicitly by the experimental evaporation residue cross-sections of the heavy-ion reactions used for synthesizing the SHEs Z = 104 − 118 successfully.…”

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confidence: 99%

Exploring an experimental route of synthesizing superheavy elements beyond Z > 118

Manjunatha,

Vidya,

Gupta

et al. 2021

Preprint

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Role of the Coulomb interaction, mean fissility, mass asymmetry, and charge asymmetry parameters on the synthesis of heavy and superheavy elements has been examined with respect to the deformation parameters of the projectile and target nuclei explicitly in light of the experimental results. The observed facts are classified into four categories and are then used to study several unsuccessful as well as planned reactions to synthesize the new superheavy elements Z = 119, 120. Concrete inference is too difficult to draw from these results because of excessive deviations in evaporation residue cross-section data. It is found that the arbitrary choice of excitation energy for the experiments studied was the root cause of such large deviations. Such a complex issue can be resolved well by theoretical excitation function studies using the advanced statistical model or the dinuclear system model and choosing the excitation energy corresponding to the energy where the excitation function curve shows the maximum. We believe this method may help us to predict whether the estimated evaporation residue cross section can be measurable within the experimental limit of the existing facilities for the future reactions planned.

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New procedure to determine the mass-angle correlation of quasifission

Cited by 11 publications

References 44 publications

Quasifission Dynamics in Microscopic Theories

Quasifission Dynamics in Microscopic Theories

Rules of thumb for synthesizing superheavy elements

Exploring an experimental route of synthesizing superheavy elements beyond Z > 118

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