Incomplete fusion in 16O+159Tb

Sharma, Vijay R.; Singh, Pushpendra P.; Shuaib, Mohd; Yadav, Abhishek; Bala, Indu; Sharma, Manoj K.; Gupta, Sunita; Singh, Devendra P.; Kumar, Rajesh; Muralithar, S.; Singh, R. P.; Singh, B. P.; Prasad, R.; Bhowmik, R. K.

doi:10.1016/j.nuclphysa.2015.11.012

Cited by 14 publications

(4 citation statements)

References 37 publications

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“…The review on ICF by Gerschel et al [20] suggested that the localization of the ℓ window depends on the target deformation. The localization of the ℓ window has also been reported in the spin distribution measurements [21][22][23]. The most widely used theoretical models to explain the ICF are the (i) SUM RULE model [24,25], (ii) break-up fusion model [26], (iii) exciton model [27], (iv) hot-spot model [28], (v) promptly emitted particles model [29], (vi) overlap model [30][31][32][33], etc.…”

Section: Introductionmentioning

confidence: 87%

“…In order to have a better and clearer picture about the dynamics of ICF reactions, the onset and strength of the ICF component is studied with the various entrance channel parameters viz., (i) projectile energy; (ii) input angular momenta; (iii) α-Q value of the projectile, which corresponds to the alpha particle binding energy of the projectile; (iv) binding energy of the projectile; (v) mass-asymmetry; and (vi) Coulomb effect. Recently, high-quality data on excitation functions (EFs) [9,[34][35][36], spin distributions [21][22][23], and recoil range distributions [37][38][39] of individual reaction products have been obtained in a variety of experiments performed at the Inter University Accelerator Centre (IUAC), New Delhi, which clearly indicates the presence of ICF at low energies but is limited to a few projectile-target combinations only. In this present work, EFs for a large number of reaction residues populated in the interaction of 19 F+ 169 Tm systems have been measured at energies ≈4-6 MeV/nucleon.…”

Section: Introductionmentioning

confidence: 99%

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Influence of incomplete fusion on complete fusion at energies above the Coulomb barrier

Shuaib

Sharma

Yadav

et al. 2017

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

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In the present work, excitation functions of several reaction residues in the system 19F+169Tm, populated via the complete and incomplete fusion processes, have been measured using off-line γ-ray spectroscopy. The analysis of excitation functions has been done within the framework of statistical model code pace4. The excitation functions of residues populated via xn and pxn channels are found to be in good agreement with those estimated by the theoretical model code, which confirms the production of these residues solely via complete fusion process. However, a significant enhancement has been observed in the cross-sections of residues involving α-emitting channels as compared to the theoretical predictions. The observed enhancement in the cross-sections has been attributed to the incomplete fusion processes. In order to have a better insight into the onset and strength of incomplete fusion, the incomplete fusion strength function has been deduced. At present, there is no theoretical model available which can satisfactorily explain the incomplete fusion reaction data at energies ≈4–6 MeV/nucleon. In the present work, the influence of incomplete fusion on complete fusion in the 19F+169Tm system has also been studied. The measured cross-section data may be important for the development of reactor technology as well. It has been found that the incomplete fusion strength function strongly depends on the α-Q value of the projectile, which is found to be in good agreement with the existing literature data. The analysis strongly supports the projectile-dependent mass-asymmetry systematics. In order to study the influence of Coulomb effect ( ) on incomplete fusion, the deduced strength function for the present work is compared with the nearby projectile–target combinations. The incomplete fusion strength function is found to increase linearly with , indicating a strong influence of Coulomb effect in the incomplete fusion reactions.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Influence of incomplete fusion on complete fusion at energies above the Coulomb barrier

Shuaib

Sharma

Yadav

et al. 2017

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

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“…where μ is the reduced mass, E is the center of mass energy of projectile and V c is the Coulomb barrier, and (ii) mass asymmetry of the system, μ A = M T −M P M T +M P where M T and M P is the mass of target and projectile respectively, for different projectile-target combinations [54,55,[64][65][66]. In figure 7, the ratio are plotted as a function of (a) relative velocity (v rel ), and (b) mass asymmetry of the system (μ A ).…”

Section: Localization Of -Window and Entrance-channel Dependence Of Icfmentioning

confidence: 99%

“…In figure 9(a), the projectile-target combinations are shown by different symbols-filled circles represent 12 C + 169 Tm at E lab ≈ 67-90 MeV (present work and [55]), half-filled circles represent 16 O + 159 Tb at E lab ≈ 83-97 MeV [65], filled square represents 16 O + 169 Tm at E lab ≈ 87.6 MeV [54], filled hexagon represents 16 O + 154 Sm [66], and half-filled square represents 16 O + 124 Sn [64] at E lab ≈ 97.6 MeV. As can be seen from this figure, there is a linear increase in the value of ratio with v rel for 12 C + 169 Tm and 16 O + 159 Tb.…”

Section: Localization Of -Window and Entrance-channel Dependence Of Icfmentioning

confidence: 99%

Disentangling complete and incomplete fusion events in ¹²C + ¹⁶⁹Tm reaction by spin-distribution measurements

Sood¹,

Thakur²,

Sharma³

et al. 2020

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

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The spin-distributions of different reaction products populated via x n and α/2αx n channels in C 12 + Tm 169 system have been measured at E lab ≈ 6, 7 and 7.5 MeV A−1 to disentangle complete and incomplete fusion events. Particle (p, α)-γ-coincidences were recorded to identify evaporation residues channel-by-channel. The spin-distributions of fusion evaporation and direct-α-emitting channels are found to be distinct corroborating the involvement of entirely different reaction dynamics in their production, respectively termed as complete (CF) and incomplete fusion (ICF). The values of mean input angular momenta, obtained from the analysis of the spin-distributions, involved in ICF-α/2α xn channels are estimated to be larger than that observed in CF-xn/α xn channels. For ICF-α/2αxn channels, the multiplicity of fast-α particle emission increases with the magnitude of input angular momentum imparted into the system. The CF residues display a population of broad spin range while the ICF residues are confined to a narrow spin range generally localized in the higher spin states. Findings of the present work conclusively demonstrate the possibility to populate high spin states in final reaction products using ICF, which are otherwise not accessible. Further, an attempt has been made to study the variation of input angular momentum with the choice of different entrance-channel parameters. It has been observed that the value of input angular momentum involved in ICF-α/2α xn channels increases with the deformation and entrance-channel mass-asymmetry parameter, indicating strong entrance-channel dependence of ICF dynamics.

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Spin distribution of evaporation residues formed in complete and incomplete fusion in 16 O+ 154 Sm system

et al. 2017

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Incomplete fusion in 16O+159Tb

Cited by 14 publications

References 37 publications

Influence of incomplete fusion on complete fusion at energies above the Coulomb barrier

Influence of incomplete fusion on complete fusion at energies above the Coulomb barrier

Disentangling complete and incomplete fusion events in ¹²C + ¹⁶⁹Tm reaction by spin-distribution measurements

Spin distribution of evaporation residues formed in complete and incomplete fusion in 16 O+ 154 Sm system

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Incomplete fusion in 16O+159Tb

Cited by 14 publications

References 37 publications

Influence of incomplete fusion on complete fusion at energies above the Coulomb barrier

Influence of incomplete fusion on complete fusion at energies above the Coulomb barrier

Disentangling complete and incomplete fusion events in 12C + 169Tm reaction by spin-distribution measurements

Spin distribution of evaporation residues formed in complete and incomplete fusion in 16 O+ 154 Sm system

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Disentangling complete and incomplete fusion events in ¹²C + ¹⁶⁹Tm reaction by spin-distribution measurements