The study of threshold behaviour of effective potential for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mmultiscripts><mml:mi mathvariant="normal">Li</mml:mi><mml:mprescripts /><mml:none /><mml:mn>6</mml:mn></mml:mmultiscripts><mml:mo>+</mml:mo><mml:mmultiscripts><mml:mi mathvariant="normal">Ni</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>58</mml:mn><mml:mo>,</mml:mo><mml:mn>64</mml:mn></mml:mrow></mml:mmultiscripts></mml:math> systems

Biswas, Mukul; Roy, Shibaji; Sinha, M. K.; Pradhan, M. K.; Mukherjee, A.; Basu, P.; Majumdar, H.; Ramachandran, K.; Shrivastava, A.

doi:10.1016/j.nuclphysa.2008.01.025

Cited by 54 publications

(27 citation statements)

References 36 publications

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“…Threshold behaviour of potentials (real and imaginary) is somewhat different from those usually found for cases involving medium and heavy mass targets Ref. [9][10][11][12].…”

Section: Experimental Details and Analysiscontrasting

confidence: 63%

Coupled channel effect in elastic scattering and fusion for^6,7Li+²⁸Si

Sinha

Roy

Basu

et al. 2011

EPJ Web of Conferences

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Abstract.The fusion excitation and elastic angular distribution were measured for 6,7 Li+ 28 Si from below to above Coulomb barrier (≤ 3V b ) energies. The barrier distribution derived from the fusion data was found to be broad and asymmetric at the sub-barrier region, compared to 1D BPM estimation. Effect of rotational coupling on fusion was found to be not so dominant. Phenomenological optical potential parameters, with surface and volume type imaginary potentials, were obtained from f tting of elastic scattering data and energy dependence of real and imaginary surface strengths were investigated around the barrier. CDCC calculations considering only breakup of projectile were performed for 6,7 Li+ 28 Si with the elastic scattering data, using the code FRESCO. The effects of breakup of projectile on elastic cross section do not agree with the energy dependence of real and imaginary strength with volume type imaginary potential around the barrier.

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“…Threshold behaviour of potentials (real and imaginary) is somewhat different from those usually found for cases involving medium and heavy mass targets Ref. [9][10][11][12].…”

Section: Experimental Details and Analysiscontrasting

confidence: 63%

Coupled channel effect in elastic scattering and fusion for^6,7Li+²⁸Si

Sinha

Roy

Basu

et al. 2011

EPJ Web of Conferences

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“…In this context, we present here our recent measurement of fusion excitaa e-mail: moin.shaikh@saha.ac.in tion function for weakly bound projectile 6 Li (S α = 1.47 MeV) with medium mass target 64 Ni at near-barrier energies. The elastic scattering measurement for this system [11] indicates the presence of breakup threshold anomaly (BTA) or breakup induced threshold behaviour of effective interaction potential around the barrier. Hence, it will be interesting to see the effect of breakup or breakup like processes on fusion at these energies.…”

Section: Introductionmentioning

confidence: 88%

Fusion excitation function measurement for⁶Li+⁶⁴Ni at near-barrier energies

Shaikh

Roy

Rajbanshi

et al. 2015

EPJ Web of Conferences

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Abstract. Total fusion excitation function has been measured for the reaction of weakly bound 6 Li projectile on medium mass 64 Ni target at energies near the Coulomb barrier of the system. Online characteristic γ-ray detection method has been used to identify and determine the cross sections of the residues. No suppression of total fusion cross section (σ T F ) is observed at above barrier energies. But enhancement of measured cross section with respect to the one-dimensional barrier penetration model (1-DBPM) calculation is observed at below barrier energies. The enhancement can not be explained by coupled channels calculation with dominant projectile and target excitations as well as one-neutron stripping reaction.

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“…Also the threshold behaviour of the interaction potential does not indicate any distinct isotopic dependence for 6 Li+ 58¤ 64 Ni. On the other hand, though 7 Li+ 64 Ni shows normal threshold behaviour, for 7 Li+ 58 Ni, the potential does not exhibit any significant energy dependence. Unlike 6 Li, in case of 7 Li a distinct isotopic dependence has been observed for 58 Ni and 64 Ni.…”

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confidence: 89%

“…For instance, the energy dependence for 6 Ni the Q-values are : +1.749 MeV and -1.152 MeV respectively. As the Q-value of a reaction governs the probability of occurrence of a particular reaction channel, this difference in 1n stripping process from 7 Li+ 64 Ni to 7 Li+ 58 Ni can be reflected in the threshold behaviour of the interaction potential for the two isotopes.…”

Section: Introductionmentioning

confidence: 99%

Threshold behaviour of effective potential for 6,7Li+58,64Ni around the Coulomb barrier

Biswas¹

2009

Proceedings of 10th Symposium on Nuclei in the Cosmos — PoS(NIC X)

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In order to probe the effect of the breakup or transfer induced breakup coupling on the energy dependence of the optical potential in the presence of conventional quasielastic couplings, the elastic scattering angular distributions for of the potential components with decreasing energy were extracted. A further analysis of the measured angular distributions, along with the existing data for 6¤ 7 Li+ 58 Ni, was performed with two different model potentials -one with the folded potential normalized with a complex factor (OMP1) and the other with a hybrid potential composed of a renormalized folded real and a phenomenological imaginary (OMP2) potential components. All the model potentials predict similar energy dependent behaviour for the interaction potential around the barrier indicating a model independence of the observed behaviour. The observed energy dependences of the strengths of the real and imaginary potentials also corroborate with the dispersion relation prediction for both the 6 Li+ 64 Ni and 6 Li+ 58 Ni systems. Though the evidence of breakup is distinct in the energy variation of the potential strengths for 6 Li+ 58¤ 64 Ni systems, close to the barrier the variation is more in the line of conventional threshold anomaly. Also the threshold behaviour of the interaction potential does not indicate any distinct isotopic dependence for 6 Li+ 58¤ 64 Ni. On the other hand, though 7 Li+ 64 Ni shows normal threshold behaviour, for 7 Li+ 58 Ni, the potential does not exhibit any significant energy dependence. Unlike 6 Li, in case of 7 Li a distinct isotopic dependence has been observed for 58 Ni and 64 Ni. 10th Symposium on Nuclei in the Cosmos

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The study of threshold behaviour of effective potential for Li6+Ni58,64 systems

Cited by 54 publications

References 36 publications

Coupled channel effect in elastic scattering and fusion for^6,7Li+²⁸Si

Coupled channel effect in elastic scattering and fusion for^6,7Li+²⁸Si

Fusion excitation function measurement for⁶Li+⁶⁴Ni at near-barrier energies

Threshold behaviour of effective potential for 6,7Li+58,64Ni around the Coulomb barrier

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The study of threshold behaviour of effective potential for Li6+Ni58,64 systems

Cited by 54 publications

References 36 publications

Coupled channel effect in elastic scattering and fusion for6,7Li+28Si

Coupled channel effect in elastic scattering and fusion for6,7Li+28Si

Fusion excitation function measurement for6Li+64Ni at near-barrier energies

Threshold behaviour of effective potential for 6,7Li+58,64Ni around the Coulomb barrier

Contact Info

Product

Resources

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Coupled channel effect in elastic scattering and fusion for^6,7Li+²⁸Si

Coupled channel effect in elastic scattering and fusion for^6,7Li+²⁸Si

Fusion excitation function measurement for⁶Li+⁶⁴Ni at near-barrier energies