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arXiv · 1911.06039

Fusion of Borromean nucleus $^{9}$Be with $^{197}$Au target at near barrier energies

Malika Kaushik·G. Gupta·Swati Thakur·H. Krishnamoorthy·Pushpendra P. Singh·V. V. Parkar·V. Nanal·A. Shrivastava·R. G. Pillay·K. Mahata·K. Ramachandran·S. Pal·C. S. Palshetkar·S. K. Pandit
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Abstract

To probe the role of the intrinsic structure of the projectile on sub-barrier fusion, measurement of fusion cross sections has been carried out in $^{9}$Be + $^{197}$Au system in the energy range E$_{c.m.}$/V$_B$ $\approx$ 0.82 to 1.16 using off-beam gamma counting method. Measured fusion excitation function has been analyzed in the framework of the coupled-channel approach using CCFULL code. It is observed that the coupled-channel calculations, including couplings to the inelastic state of the target and the first two states of the rotational band built on the ground state of the projectile, provide a very good description of the sub-barrier fusion data. At above barrier energies, the fusion cross section is found to be suppressed by $\approx$ 39(2)\% as compared to the coupled-channel prediction. A comparison of reduced excitation function of $^{9}$Be + $^{197}$Au with other $x$ + $^{197}$Au shows a larger enhancement for $^9$Be in the sub-barrier region amongst Z=2-5 weakly and tightly bound projectiles, which indicates the prominent role of the projectile deformation in addition to the weak binding.

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BibTeXRIS

Malika Kaushik, G. Gupta, Swati Thakur, H. Krishnamoorthy, Pushpendra P. Singh, V. V. Parkar, V. Nanal, A. Shrivastava, R. G. Pillay, K. Mahata, K. Ramachandran, S. Pal, C. S. Palshetkar, S. K. Pandit. 2019-11-14. Fusion of Borromean nucleus $^{9}$Be with $^{197}$Au target at near barrier energies. https://doi.org/10.1103/physrevc.101.034611

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