Influence of neutron transfer channels and collective excitations in the fusion of 
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 with 
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Gautam, Manjeet Singh; Duhan, Sukhvinder; Chahal, Rishi Pal; Khatri, Hitender; Kuhar, Suman B.; Vinod, K.

doi:10.1103/physrevc.102.014614

Cited by 18 publications

(8 citation statements)

References 98 publications

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“…significantly boosted the sub-barrier fusion cross-sections [10,16,22,[52][53][54][55][56][57][58][59][60][61][62][63]. The fusion cross-sections for 16 O+ 60 Ni and 18 O+ 58 Ni systems based on no coupling and coupled channel calculations are depicted in figures 3(a) and (b).…”

Section: Fusion Ofmentioning

confidence: 99%

“…This anomalous behaviour of fusion excitation function introduces the importance of multidimensional tunneling [1][2][3][4][5][6][7][8][9][10][11][12][13]. In literature, it has been well established that the nuclear structure degrees of freedom associated with reaction partners such as low-lying surface vibrations, zero-point motion, neck formation, static nuclear deformation, entrance channel mass asymmetry, rotational states and/or nucleon transfer channels affect the fusion process and played an important role to establish favourable conditions for the synthesis of a particular compound nucleus [13][14][15][16][17][18][19][20][21][22]. Several coupled channel approaches had well accounted for the involvement oflow-lying surface vibrations and/or static deformationsin the sub-barrierenhancement offusion excitation functions [2,13,[23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…According to the literature, the fusion of 12 C+ 92 Zr and 16 O+ 92 Zr reactions was dominated by the coupling to multi-phonon vibrational states of the target nucleus, whereas for the fusion of 28 Si+ 92 Zr and 35 Cl+ 92 Zr reactions, the strong influencesof neutron transfer channels were reported [51]. In literature [10,16,22,[52][53][54][55][56][57][58][59][60][61][62][63], it has been demonstrated that the positive Q-value neutron transfer channels favor the fusion enhancement in sub-barrier energy regions. As in the fusion dynamics of 16 O+ 60 Ni [52,53], 40 Ca+ 90 Zr [58,61,62], 32 S+ 90 Zr [58,63] and 28 Si+ 90 Zr [22] reactions, the sub-barrier fusion enhancements were explained by just invoking the inelastic surface excitations of the collision partners.…”

Section: Introductionmentioning

confidence: 99%

“…In literature [10,16,22,[52][53][54][55][56][57][58][59][60][61][62][63], it has been demonstrated that the positive Q-value neutron transfer channels favor the fusion enhancement in sub-barrier energy regions. As in the fusion dynamics of 16 O+ 60 Ni [52,53], 40 Ca+ 90 Zr [58,61,62], 32 S+ 90 Zr [58,63] and 28 Si+ 90 Zr [22] reactions, the sub-barrier fusion enhancements were explained by just invoking the inelastic surface excitations of the collision partners. However, the sub-barrier fusion enhancements of 18 O+ 58 Ni [52,53], 40 Ca+ 94,96 Zr [58,61,62], 32 S+ 94,96 Zr [58,63] and 28 Si+ 94,96…”

Section: Introductionmentioning

confidence: 99%

“…As in the fusion dynamics of 16 O+ 60 Ni [52,53], 40 Ca+ 90 Zr [58,61,62], 32 S+ 90 Zr [58,63] and 28 Si+ 90 Zr [22] reactions, the sub-barrier fusion enhancements were explained by just invoking the inelastic surface excitations of the collision partners. However, the sub-barrier fusion enhancements of 18 O+ 58 Ni [52,53], 40 Ca+ 94,96 Zr [58,61,62], 32 S+ 94,96 Zr [58,63] and 28 Si+ 94,96 Zr [22] reactions with respect to their counterpart cannot be explained just by considering the inelastic surface excitations alone. For these systems, the coupling to nucleon transfer channels were turned out to be necessarily needed to address the observed sub-barrier fusion enhancements.…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive analysis of heavy-ion fusion reactions around the Coulomb barrier

Gautam¹,

Ghanghas²,

Chahal³

et al. 2022

Phys. Scr.

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We have investigated the fusion dynamics of 12C + 92Zr, 16O + 92Zr, 28Si + 92Zr, 35Cl + 92Zr, 16O + 60Ni, 18O + 58Ni, 12C + 194,198Pt, 16O + 144,148,154Sm and 17O + 144Sm reactions in the close vicinity of the Coulomb barrier. For this purpose, we have opted one-dimensional Wong formula, coupled channel approach, and symmetric-asymmetric Gaussian barrier distribution (SAGBD) model to analyze the fusion data for above mentioned reactions. For all studied systems, the theoretical results obtained from the one-dimensional Wong formula are unable to reproduce the fusion data especially at incident energies lying below the nominal barrier. This appeals for the inclusion of intrinsic degrees of freedom which have been originated from the nuclear structure of fusing nuclei, and thus essentially required to explain the experimental data at energies lying in the sub-barrier realm. For the chosen reactions, the coupled channel analysis suggests that the coupling of relative motion with the inelastic surface excitations and/or nucleon transfer channels associated with the reaction partners have produced a remarkable fusion enhancement at energies lying near and below the nominal barrier. It is particularly intriguing that the SAGBD model can replicate the impacts of dominant intrinsic reaction channels such as multi-phonon quantum states and/or nucleon transfer channels via Gaussian type of weight function. The predictions of the SAGBD approach appropriately reproduce the fusion cross-sections data and related barrier distributions data for the selected reactions due the fact that the multi-dimensional nature induces the barrier lowering effects and subsequently reduces the effective fusion barrier between the participants. In the SAGBD approach, the channel coupling effects are quantitively measured in terms of channel coupling parameter (λ) and percentage decrement in height of effective fusion barrier with respect to the Coulomb barrier (VCBRED ) . Furthermore, the recovered x 2-values for selected reactions are found to be smaller and hence clearly demonstrate the applicability of the model outcomes to explore the fusion dynamics of the studied systems.

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