Effect of entrance-channel parameters on incomplete fusion reactions

Yadav, Abhishek; Sharma, Vijay R.; Singh, Pushpendra P.; Singh, Devendra P.; Kumar, R.; Unnati,; Sharma, Manoj K.; Singh, B. P.; Prasad, R.; Bhowmik, R. K.

doi:10.1103/physrevc.85.064617

Cited by 21 publications

(3 citation statements)

References 59 publications

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“…For A 0 ≈ 0.90 fm, the values of max increas by ≈3 for the 13 C+ 169 Tm system and ≈2 for the 12 C+ 169 Tm system. In the present work, the values of max are smaller than the values of crit , indicating no fusion above crit , which suggests that the partial waves below crit also contribute to the ICF processes [51,76].…”

Section: F Fusion Distributionmentioning

confidence: 58%

Influence of a one-neutron-excess projectile on low-energy incomplete fusion

et al. 2014

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Background: Incomplete fusion has been found to be an important contributor in light heavy-ion (A 20) induced reactions even at slightly above barrier energies. Purpose: For better insight into the dynamics of incomplete fusion, the onset and influence of incomplete fusion need to be investigated in terms of projectile energy (E lab ) and entrance channel mass-asymmetry (μ A ). A rich set of experimental data on incomplete fusion may be useful to correlate the probability of incomplete fusion with the various entrance channel parameters and eventually to develop a theoretical model code for the same. Presently, there is no theoretical model available which can explain low-energy incomplete fusion data consistently. Methods: The excitation functions of complete and incomplete fusion residues populated in the 13 C+ 169 Tm system have been measured using the recoil-catcher activation technique followed by offline γ spectroscopy. The evaporation residues have been identified on the basis of characteristic γ lines and confirmed through the decay-curve analysis. Results: The excitation functions of xn and pxn channels are found to be in good agreement with the statistical model code PACE4; this suggests the population of these channels via complete fusion. Some residues are found to have a contribution from their higher charge isobar precursor decay. The precursor contribution has been deduced from the cumulative cross section using the standard successive radioactive decay formulations. The excitation functions of α-emitting channels are observed to be significantly enhanced as compared to the statistical model code PACE4. This enhancement may be attributed to the contribution from incomplete fusion. The incomplete fusion strength function for 13 C+ 169 Tm is compared with that obtained in the 12 C+ 169 Tm system. It has been found that the one-neutron (1n) excess projectile 13 C (as compared to 12 C) results in a less incomplete fusion contribution due to its relatively large negative alpha-Q value. Recently proposed "alpha-Q-value systematics" seems to explain incomplete fusion data.

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Section: F Fusion Distributionmentioning

confidence: 58%

Influence of a one-neutron-excess projectile on low-energy incomplete fusion

et al. 2014

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“…Complete and incomplete fusion cross sections obtained by using this model are reported in several works (see, for example, Refs. [31][32][33][34][35][36][37][38][39]). However, this approach has being applied only for energies well above the Coulomb barrier, with L crit being independent of the incident energy.…”

Section: Introductionmentioning

confidence: 99%

Theoretical analysis of 8Li + 208Pb reaction and the critical angular momentum for complete fusion

et al. 2020

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In a theoretical approach, the complete and incomplete fusions are investigated by considering the 8 Li + 208 Pb reaction. By decreasing the projectile ground-state binding energy ε b from its known experimental value, the complete fusion is shown to have insignificant dependence on such variations, whereas the incomplete fusion strongly depends on that. The complete and incomplete fusion cross sections are calculated by using a combination of both continuum-discretized coupled-channel and sum-rule models. To this end, an incident-energy dependent cut-off angular momentum L c is first obtained by using the available complete fusion experimental data, within an approach which is extended to model results obtained for other incident-energies. An approximated fitted expression linking L c to the well-known critical value L crit derived by Wilczyński [Nucl. Phys. A 216 (1973) 386] suggests a generalization of the corresponding sum-rule model to energies around and below the Coulomb barrier.

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“…According to this model, the CF is a process that occurs at lower angular momenta, and the ICF at higher angular momenta, both processes being separated by a critical angular momentum, L crit , which is the relevant energy-dependent part of the total angular momentum J = L+S (implying that the constraints in J goes along with the corresponding limits established for the "orbital angular momentum quantum number" L). Complete and incomplete fusion cross sections calculated through this model have been reported in several works, such as [23][24][25][26][27][28][29][30], among others. However, being semi-classical, it only applies to higher incident energies above the Coulomb barrier, with L crit being independent of the incident energy.…”

Section: Introductionmentioning

confidence: 77%

Analysis of Fusion Cross Sections in the 9Be Projectile Breakup on Different Target Nuclei

Mukeru

Tomio

2020

Braz J Phys

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We present a theoretical study of total fusion (TF), complete fusion (CF), and incomplete fusion (ICF) cross sections in the breakup of 9 Be (described as n− 8 Be) projectile on 124 Sn, 144 Sm and 208 Pb target nuclei. We use the continuum discretized coupled-channel formalism together with a sum-rule model, by extending an approach outlined in Mukeru et al. (Nucl. Phys. A 996:121700, 2020) to another weakly bound projectile in different targets. The applicability of the model to incident energies below and around the Coulomb barrier is verified, being confirmed for all three reactions an empirical energydependent cutoff angular momentum expression. We show that the TF and ICF cross sections are strongly dependent on the projectile binding energy ε b , whereas the CF is weakly affected by that. Despite this weak dependence, the CF contribution to the TF cross section becomes more suppressed by decreasing ε b. The dependence of the ICF probability on the breakup threshold is also highlighted.

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Effect of entrance-channel parameters on incomplete fusion reactions

Cited by 21 publications

References 59 publications

Influence of a one-neutron-excess projectile on low-energy incomplete fusion

Influence of a one-neutron-excess projectile on low-energy incomplete fusion

Theoretical analysis of 8Li + 208Pb reaction and the critical angular momentum for complete fusion

Analysis of Fusion Cross Sections in the 9Be Projectile Breakup on Different Target Nuclei

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