Skyrme forces and the fusion-fission dynamics of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:msup><mml:mrow /><mml:mn>132</mml:mn></mml:msup><mml:mi>Sn</mml:mi></mml:mrow><mml:mo>+</mml:mo><mml:mrow><mml:msup><mml:mrow /><mml:mn>64</mml:mn></mml:msup><mml:mi>Ni</mml:mi></mml:mrow><mml:mo>→</mml:mo><mml:msup><mml:mrow><mml:msup><mml:mrow /><mml:mn>196</mml:mn></mml:msup><mml:mi>Pt</mml:mi></mml:mrow><mml:mo>*</mml:mo></mml:msup></mml:mrow></mml:math>

Jain, Deepak; Kumar, Raj; Sharma, Manoj K.; Gupta, Raj K.

doi:10.1103/physrevc.85.024615

Cited by 51 publications

(6 citation statements)

References 37 publications

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“…(14) for the Skyme forces SIII and GSkI. Note that SIII is an old force [44,45], and GSkI was given recently [46,47], made more appropriate for the isospin-rich nuclei, as is the case for the reaction studied here. Next,R(T ) in Eq.…”

Section: The Dynamical Cluster-decay Model For a Hot And Rotatingmentioning

confidence: 95%

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Dynamical cluster-decay model using various formulations of a proximity potential for compact non-coplanar nuclei: Application to the64Ni+100
Bansal
¹
,
Chopra
²
,
Gupta
³

et al. 2012
Phys. Rev. C
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The dynamical cluster-decay model (DCM), using the well-known pocket formula of Blocki et al. [Ann. Phys. (NY) 105, 427 (1977)] for nuclear proximity potential, is extended to the use of various other nuclear proximity potentials with effects of deformations included up to hexadecapole (β 4 ) and "compact" orientations taken for both coplanar ( = 0) and non-coplanar ( = 0) configurations of nuclei for the first time. The other nuclear proximity potentials used are those derived from the Skyrme-energy-density-formalism-based semiclassical extended Thomas Fermi method under frozen density approximation for a compound nucleus, using SIII and GSkI Skyrme forces. This is in addition to extending the Blocki et al. interaction to "compact" and non-coplanar nuclei. Application of the method is made to the study of the decay of the hot and rotating compound nucleus 164 Yb * , formed in the heavy-ion reaction 64 Ni + 100 Mo at both below-and above-barrier energies. For the best fitted measured evaporation residue cross-sections, consisting of x neutrons (x = 1-4), the interesting result of including the degree of freedom is to increase the neck-length parameter of the model which results in the decrease of reaction time as well as the "barrier-lowering" parameter responsible for fusion hindrance effect. In other words, the fusion hindrance effect, a built-in property of DCM, though different for different nuclear interactions, reduces for the non-coplanar nuclei, and this reduction is more at higher center-of-mass energies. In the case of fusion-fission, only the CASCADE cross sections are available, which, when fitted simultaneously to another neck-length parameter, result in different components of a fusion-fission cross section for different nuclear interactions, including also the possibility of quasifission at the highest energy and the symmetric fission alone, that is, no intermediate-mass fragments, etc. The non-coplanar degree of freedom also plays an important role in changing the constituents of the fusion-fission cross section significantly, say, from intermediate and heavy-mass fragments plus the symmetric fission to simply the intermediate-mass fragments plus near-symmetric fission. This situation calls for the data for fusion-fission cross sections.

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Section: The Dynamical Cluster-decay Model For a Hot And Rotatingmentioning

confidence: 95%

“…This has important consequences for the choice of a proper nuclear interaction, which is shown more explicitly in Ref. [47] for the use of the extended-Wong model. (ii) In going from c = 0 to c = 0 for the Blocki et al interaction, R increases significantly, more so at higher E c.m.…”

Section: A Fusion-evaporation Cross Sections: Role Of Non-coplanaritmentioning

confidence: 97%

Dynamical cluster-decay model using various formulations of a proximity potential for compact non-coplanar nuclei: Application to the64Ni+100
Bansal
¹
,
Chopra
²
,
Gupta
³

et al. 2012
Phys. Rev. C
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32
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0
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“…The static Woods-Saxon potential in conjunction with one-dimensional Wong formula [24] fails to explain the fusion dynamics of this system, while the predictions of the EDWSP model [17][18][19][20][21] successfully explain the observed fusion dynamics of 16 32 S + 40 94 Zr system. In addition, the role of different Skyrme interactions such as SIII and GSkI within the context of one-dimensional Wong and ℓ-summed extended Wong formula [25][26][27][28] is also tested for the description of the observed sub-barrier fusion enhancement of 16 32 S + 40 94 Zr system. The nuclear potential obtained by using the Skyrme energy density formalism (SEDF) opens up the possibilities of using of variety of Skyrme forces which in turn introduce the different barrier characteristics, and hence, the barrier modification effects get introduced in the theoretical calculations.…”

Section: 96mentioning

confidence: 99%

“…However, at above barrier energies, the GSkI-based fusion cross section overestimates the experimental data. Therefore, the ℓ-summed extended Wong formula is applied, which takes care of overestimation of theoretical results at above barrier energies and consequently adequately describes the subbarrier fusion enhancement of the 16 32 S + 40 94 Zr system [25][26][27][28]. To account for the effects of inelastic surface vibrational states of the colliding pairs, coupled channel calculations for the 16 32 S + 40…”

Section: 96mentioning

confidence: 99%

Role of Barrier Modification and Inelastic Surface Excitations in Sub-Barrier Fusion of 16 32 S + 40 94 Zr Reaction

2016

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The fusion dynamics of 16 32 S + 40 94Zr reaction at near and sub-barrier energies is investigated within the context of different theoretical approaches. The various theoretical models like one-dimensional Wong formula, ℓ-summed extended Wong formula, the energy-dependent Woods-Saxon potential model (EDWSP model), and coupled channel formulation have been used to address the impacts of nuclear structure degrees of freedom of the colliding pairs. The roles of different Skyrme forces along with Wong formalism are also tested in the analysis of the sub-barrier fusion dynamics of the 16 32 S + 40 94 Zr reaction. The influence of the low-lying surface vibrational states of the collision partners is investigated within the framework of coupled channel calculations performed by the code CCFULL. In the present work, it has been observed that the EDWSP model introduces barrier modification effects somewhat similar to those of the coupled channel approach, as well as those of using different Skyrme forces and hence it reasonably addresses the observed fusion data of 16 32 S + 40 94 Zr reaction in the close vicinity of the Coulomb barrier.

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“…For a long time, the Wong formula [5] has been used for calculating the fusion cross section. In the present work, we have used the Wong formula and its extended version [6][7][8][9] to study the fusion process of 200 Pb * . To study the entrance channel dependence on the decay pattern, we used the dynamical cluster-decay model (DCM) [10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Formation and decay ofPb200*using different incoming channels

2014

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Entrance channel effect is studied in the dynamics of 200 Pb * formed in 16 O + 184 W, 19 F + 181 Ta, and 30 Si + 170 Er reactions over a wide range of excitation energies using the dynamical cluster-decay model (DCM) and Wong model. The effect of deformations up to β 2 along with optimum orientation is investigated in both formalisms. The fusion cross section is studied using the Wong model, which overestimates experimental data for 19 F + 181 Ta and 30 Si + 170 Er reactions and underestimates the data at few energies for 16 O + 184 W. However with the use of the extended -summed Wong model, the overestimation is taken care and the cross sections are fitted nicely. The Wong-based calculations suggest that there might be some noncompound nucleus contribution at few energies for the 16 O + 184 W channel, as the underestimation of the cross section persists even after the inclusion of deformation effects. This lead us to conclude that the formation of 200 Pb * compound nucleus depends on the choice of the incoming channel. In addition to this, the decay path of 200 Pb * is investigated using DCM. Although the overall decay pattern of compound nucleus 200 Pb * seems similar for all the chosen reactions, some signatures of variation are observed in fission and in the intermediate mass fragment region for the deformed fragmentation process. It is to be noted that with the inclusion of deformation, the decay pattern changes from symmetric to asymmetric, thereby suggesting that the deformation and orientation of decaying fragment are equally important in the formation as well as in the decay process of proton magic nuclear system 200 Pb * . Prediction of the evaporation residue and fission cross sections at higher as well as at lower incident energies is also worked out. In addition to this, the dynamics of neighboring nuclei 192 Pb * and 202 Pb * is also analyzed.

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Skyrme forces and the fusion-fission dynamics of the132Sn+64Ni→196Pt*

Cited by 51 publications

References 37 publications

Dynamical cluster-decay model using various formulations of a proximity potential for compact non-coplanar nuclei: Application to the64Ni+100
Bansal
¹
,
Chopra
²
,
Gupta
³

et al. 2012
Phys. Rev. C
Self Cite
32
0
8
0
View full text Add to dashboard Cite

Dynamical cluster-decay model using various formulations of a proximity potential for compact non-coplanar nuclei: Application to the64Ni+100
Bansal
¹
,
Chopra
²
,
Gupta
³

et al. 2012
Phys. Rev. C
Self Cite
32
0
8
0
View full text Add to dashboard Cite

Role of Barrier Modification and Inelastic Surface Excitations in Sub-Barrier Fusion of 16 32 S + 40 94 Zr Reaction

Formation and decay ofPb200*using different incoming channels

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Skyrme forces and the fusion-fission dynamics of the132Sn+64Ni→196Pt*

Cited by 51 publications

References 37 publications

Dynamical cluster-decay model using various formulations of a proximity potential for compact non-coplanar nuclei: Application to the64Ni+100Bansal1, Chopra2, Gupta3 et al. 2012Phys. Rev. CSelf Cite32080View full textAdd to dashboardCite

Dynamical cluster-decay model using various formulations of a proximity potential for compact non-coplanar nuclei: Application to the64Ni+100Bansal1, Chopra2, Gupta3 et al. 2012Phys. Rev. CSelf Cite32080View full textAdd to dashboardCite

Role of Barrier Modification and Inelastic Surface Excitations in Sub-Barrier Fusion of 16 32 S + 40 94 Zr Reaction

Formation and decay ofPb200*using different incoming channels

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Resources

About

Dynamical cluster-decay model using various formulations of a proximity potential for compact non-coplanar nuclei: Application to the64Ni+100
Bansal
¹
,
Chopra
²
,
Gupta
³

et al. 2012
Phys. Rev. C
Self Cite
32
0
8
0
View full text Add to dashboard Cite

Dynamical cluster-decay model using various formulations of a proximity potential for compact non-coplanar nuclei: Application to the64Ni+100
Bansal
¹
,
Chopra
²
,
Gupta
³

et al. 2012
Phys. Rev. C
Self Cite
32
0
8
0
View full text Add to dashboard Cite