Study of charged particles emitted from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Te</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>117</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>compound nuclei. II. Comparison between<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvarian

Galin, J.; Gatty, B.; Guerreau, D.; Rousset, C.; Schlotthauer-Voos, U. C.; Tarrago, X.

doi:10.1103/physrevc.9.1126

Cited by 88 publications

(38 citation statements)

References 25 publications

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“…About half a century ago, forward peaked high energetic α-particles were observed in the intermediate energy heavy-ion induced reactions leading to the considerable partial fusion due to merging of remaining part of a projectile with the target, termed as massive transfer reactions [16][17][18][19]. In the eighties and nineties, a number of light heavy-ions (such as 12 C, 16 O, 20 Ne etc.)…”

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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Section: Introductionmentioning

confidence: 99%

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

2017

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“…The results presented in this paper supplements Morgenstern's mass asymmetry systematics, and the presentation of results in this particular fashion is termed as Pro-Mass systematics. The extension of this work using 13 C, 14 N and 18 O beams with 169 Tm target would be interesting, and will be helpful for further refinement of present systematics.…”

Section: Discussionmentioning

confidence: 99%

“…However, a significant ICF contribution has been observed at slightly above barrier energies [11,12]. The existence of ICF at low incident energy has triggered scientific thrust to probe different aspects of underlying dynamics which are not yet fully understood [3,4,[13][14][15]. The important findings of previous studies on ICF are; (i) at high -values ( ≥ crit ), incident projectile breaks up into constituents to provide sustainable input angular momenta, and fuses partly with target nucleus [4,[16][17][18][19], (ii) the partially-fused-compositesystem forms with less mass/charge and recoil velocity as that of completely fused composite (CFC)-system [10,[20][21][22][23][24], and (iii) the fraction of ICF has been found to be large for more mass-asymmetric systems [28].…”

Section: Introductionmentioning

confidence: 99%

Projectile - Mass asymmetry systematics for low energy incomplete fusion

Singh

Yadav

Sharma

et al. 2015

EPJ Web of Conferences

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Abstract. In the present work, low energy incomplete fusion (ICF) in which only a part of projectile fuses with target nucleus has been investigated in terms of various entrance channel parameters. The ICF strength function has been extracted from the analysis of experimental excitation functions (EFs) measured for different projectile-target combinations from near-to well above-barrier energies in 12 C, 16 O(from 1.02V b to 1.64V b )+ 169 Tm systems. Experimental EFs have been analysed in the framework statistical model code PACE4 based on the idea of equilibrated compound nucleus decay. It has been found that the value of ICF fraction (F ICF ) increases with incident projectile energy. A substantial fraction of ICF (F ICF ≈7 %) has been accounted even at energy as low as ≈ 7.5% above the barrier (at relative velocity v rel ≈0.027) in 12 C+ 169 Tm system, and F ICF ≈10 % at v rel ≈0.014 in 16 O+ 169 Tm system. The probability of ICF is discussed in light of the Morgenstern's mass-asymmetry systematics. The value of F ICF for 16 O+ 169 Tm systems is found to be 18.3 % higher than that observed for 12 C+ 169 Tm systems. Present results together with the re-analysis of existing data for nearby systems conclusively demonstrate strong competition of ICF with CF even at slightly above barrier energies, and strong projectile dependence that seems to supplement the Morgenstern's systematics.

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“…As a matter fact, the eq-CN formed via CF process is expected to be of pre-determined mass/charge, excitation energy and angular-momenta. However, the incompletely fused composite system (CN') forms with relatively less mass/charge and excitation energy (due to partial fusion of projectile), but at high angular-momenta (imparted into the system Since the very first experimental observations of directPLFs by Britt and Quinton [23] and Galin et al [24], there has been great interest in the dynamics of PLFs production termed as ICF. Several dynamical models have been proposed to explain the dynamics of PLFs production.…”

Section: Introductionmentioning

confidence: 99%

How does incomplete fusion show up at slightly above barrier energies?

Singh

Yadav

Sharma

et al. 2012

EPJ Web of Conferences

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Abstract.Experimental results on the onset of incomplete fusion at slightly above barrier energies are discussed in this paper. Spin-distributions of evaporation residues populated via complete and/or incomplete fusion of 12 C, 16 O (E lab ≈ 4-7 MeV) with 169 Tm have been measured to probe associated ℓ-values. Particle (Z=1,2) -γ -coincidence technique has been used for channel selection. Entirely different entry state spin populations have been observed during the de-excitation of complete and incomplete composites. The complete fusion residues are found to be strongly fed over a broad spin range. While, a narrow range feeding for only high spin states has been observed in case of incomplete fusion residues. In the present work, incomplete fusion is shown to be a promising tool to populate high spin states in final reaction products. For better insight into the onset and strength of incomplete fusion, the relative contributions of complete and incomplete fusion have been deduced from the analysis of excitation functions and forward recoil ranges. A significant fraction of ICF has been observed even at energy as low as ≈ 7% above the barrier. The relative strengths of complete and incomplete fusion deduced from the analysis of forward-recoil-ranges and excitation functions complement each other. All the available results are discussed in light of the Morgenstern's mass-asymmetry systematics. Incomplete fusion fraction is found to be large for more mass-asymmetric systems for individual projectiles, which points towards the projectile structure effect on incomplete fusion fraction. Experimentally measured forward ranges of recoils complement the existence of incomplete fusion at slightly above barrier energies, where more than one linear-momentum-transfer components associated with full-and/or partial-fusion of projectile(s) have been observed. Present results conclusively demonstrate the possibility to selectively populate high spin states via incomplete fusion.

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Study of charged particles emitted fromTe117compound nuclei. II. Comparison between

Cited by 88 publications

References 25 publications

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

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

Projectile - Mass asymmetry systematics for low energy incomplete fusion

How does incomplete fusion show up at slightly above barrier energies?

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