Complete and incomplete fusion of 6 MeV/nucleon light heavy ions on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">V</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>51</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Parker, D. J.; Hogan, James J.; Asher, J.

doi:10.1103/physrevc.39.2256

Cited by 40 publications

(21 citation statements)

References 13 publications

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“…Parker et al [39], observed forward α particles in low-Z, HI interactions on a 51 V target at ≈ 6 MeV/A. The ICF systematics have also been explored for reactions with weakly bound projectiles, in studies investigating mechanisms of fusion suppression [40][41][42][43].…”

Section: Introductionmentioning

confidence: 97%

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: Introductionmentioning

confidence: 97%

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

et al. 2014

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“…In the eighties and nineties, a number of light heavy-ions (such as 12 C, 16 O, 20 Ne etc.) induced reactions on heavy nuclei was performed to investigate CF-ICF using particle-gamma coincidence techniques and recoil range distribution techniques [11][12][13][14][15][20][21][22][23]. It is observed that the articles [18][19][20][21] are consistent with the sum rule model [24] and [13][14][15]23] with the breakup fusion model [25] [18,19,[26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…An increment in the breakup probability of a projectile with the increasing bombarding energy, more ICF in α-cluster nuclei than others and more ICF for larger entrance channel mass asymmetry corresponding to the same relative velocity, significant ICF contribution for l ≤ l crit contrary to the sum rule model, has been observed in 12,13 was collected by an electron suppressed Faraday cup fixed at the rear side of the target assembly and was measured by using a digital current integrator. Beam flux was kept almost constant during the experiment.…”

Section: Introductionmentioning

confidence: 99%

Li7 -induced reaction on Monat : A study of complete versus incomplete fusion

2017

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Background: Several investigations on the complete-incomplete fusion (CF-ICF) dynamics of α-cluster well-bound nuclei has been contemplated above the Coulomb barrier (∼ 4-7 MeV/nucleon) in recent years. It is therefore expected to observe significant ICF over CF in the reactions induced by a weakly bound α-cluster nucleus at slightly above the barrier.Purpose: Study of the CF-ICF dynamics by measuring the populated residues in the weakly bound 7 Li+ nat Mo system at energies slightly above the Coulomb barrier to well above it.Method: In order to investigate CF-ICF in the loosely bound system, 7 Li beam was bombarded on the nat Mo foils, separated by the aluminium (Al) catcher foils alternatively, within ∼ 3-6.5MeV/nucleon. Evaporation residues produced in each foil were identified by the off-line γ-ray spectrometry. Measured cross section data of the residues were compared with the theoretical model calculations based on the equilibrium (EQ) and preequilibrium (PEQ) reaction mechanisms. Results:The experimental cross section of 101m,100,99m,97 Rh, 97,95 Ru, 99m,96,95,94,93m+g Tc and 93m Mo residues measured at various projectile energies were satisfactorily reproduced by the simplified coupled channel approach in comparison to single barrier penetration model calculation.Significant cross section enhancement in the α-emitting channels was observed compared to EQ and PEQ model calculations throughout observed energy region. The ICF process over CF was analyzed by comparing with EMPIRE. The increment of the incomplete fusion fraction was observed with increasing projectile energies. Conclusions:Theoretical model calculations reveal that compound reaction mechanism is the major contributor to the production of residues in 7 Li+ nat Mo reaction. Theoretical evaluations substantiate the contribution of ICF over the CF in α-emitting channels. EMPIRE estimations shed light on its predictive capability of cross sections of the residues from the heavy-ion induced reactions.

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“…≈4-7 MeV/A), where only complete fusion (CF) is expected to be the sole contributor to the total fusion cross-section has attracted both experimentalist as well as theorists [1][2][3][4][5][6][7][8][9]. In recent studies [5][6][7][8][9][10] a substantial fraction of ICF has been observed at slightly above barrier energies.…”

Section: Introductionmentioning

confidence: 99%

Entrance channel effect in the incomplete fusion reactions

Yadav¹,

Sharma²,

Singh³

et al. 2011

EPJ Web of Conferences

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Abstract:In the present work the effect of various entrance channel parameters on incomplete fusion strength and the reaction dynamics in 12 C+ 159 Tb system at energies ≈ 4-7MeV/A have been investigated by measuring the excitation functions of individual reaction channels. Experimental excitation functions have been analyzed in the framework of compound nucleus decay using statistical model code PACE4. Analysis of data suggests the production of xn/pxn-channels via complete fusion of 12 C with 159 Tb, as these are found to be well reproduced by PACE4 predictions, while, a significant enhancement in the excitation functions of α-emitting channels has been observed over the theoretical ones. This enhancement has been attributed due to incomplete fusion. For better insight into the underlying dynamics, fraction of incomplete fusion to the total fusion has been deduced and compared with 16 O+ 159 Tb and other nearby systems as a function of various entrance channel parameters. The fraction of incomplete fusion has been found to be sensitive to the projectile type, energy and entrance-channel mass-asymmetry.

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Complete and incomplete fusion of 6 MeV/nucleon light heavy ions onV51

Cited by 40 publications

References 13 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

Li7 -induced reaction on Monat : A study of complete versus incomplete fusion

Entrance channel effect in the incomplete fusion reactions

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