Role of Projectile Degrees of Freedom in Sub-Barrier Fusion Dynamics
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| Format: | Artículo científico |
| Langue: | en |
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Sociedade Brasileira de Física
2016
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| _version_ | 1876491426473181184 |
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| author | Manjeet Singh Gautam |
| author_facet | Manjeet Singh Gautam |
| contents | Role of Projectile Degrees of Freedom in Sub-Barrier Fusion Dynamics Manjeet Singh Gautam Física, Astronomía y Matemáticas Heavy ion near Weakly bound nuclei barrier fusion reactions Coupled channel equations This work theoretically investigates the role of the projectile degrees of freedom on the fusion dynamics of various heavy-ion fusion reactions. The impact of the projectile breakup channel is studied for the fusion mechanism of the 4 89Be + 39 89Y, 6 12C+ 39 89Y, and 16 32,34S + 39 89Y reactions within the view of the coupled channel approach and the energy-dependent Woods-Saxon potential model (EDWSP model). The abovebarrier fusion cross-section data of the 4 9 Be+39 89Y reaction is suppressed by about 20 % with respect to the theoretical predictions of the coupled channel approach and the single barrier penetration model while this suppression factor is reduced to 10 % within the context of the EDWSP model calculations. Such fusion hindrance at above-barrier energies can be understood in terms of the projectile breakup effects that arise due to its low breakup threshold. However, the observed fusion enhancement of the 6 12C+39 89Y and 16 32,34S +39 89Y reactions, wherein the colliding pairs are stable against breakup, is adequately explained by the EDWSP model and the coupled channel approach in the whole range of energy around the Coulomb barrier. This reveals that the energy dependence in the nucleus-nucleus potential governs barrier modification effects (barrier height, barrier position, barrier curvature) in closely similar way as reflected from the coupled channel formulation. 2016 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46444888002 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2 Vol.46 |
| format | Artículo científico |
| id | redalyc_46444888002 |
| institution | Redalyc |
| language | en |
| publishDate | 2016 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Role of Projectile Degrees of Freedom in Sub-Barrier Fusion Dynamics Manjeet Singh Gautam Física, Astronomía y Matemáticas Heavy ion near Weakly bound nuclei barrier fusion reactions Coupled channel equations Role of Projectile Degrees of Freedom in Sub-Barrier Fusion Dynamics Manjeet Singh Gautam Física, Astronomía y Matemáticas Heavy ion near Weakly bound nuclei barrier fusion reactions Coupled channel equations This work theoretically investigates the role of the projectile degrees of freedom on the fusion dynamics of various heavy-ion fusion reactions. The impact of the projectile breakup channel is studied for the fusion mechanism of the 4 89Be + 39 89Y, 6 12C+ 39 89Y, and 16 32,34S + 39 89Y reactions within the view of the coupled channel approach and the energy-dependent Woods-Saxon potential model (EDWSP model). The abovebarrier fusion cross-section data of the 4 9 Be+39 89Y reaction is suppressed by about 20 % with respect to the theoretical predictions of the coupled channel approach and the single barrier penetration model while this suppression factor is reduced to 10 % within the context of the EDWSP model calculations. Such fusion hindrance at above-barrier energies can be understood in terms of the projectile breakup effects that arise due to its low breakup threshold. However, the observed fusion enhancement of the 6 12C+39 89Y and 16 32,34S +39 89Y reactions, wherein the colliding pairs are stable against breakup, is adequately explained by the EDWSP model and the coupled channel approach in the whole range of energy around the Coulomb barrier. This reveals that the energy dependence in the nucleus-nucleus potential governs barrier modification effects (barrier height, barrier position, barrier curvature) in closely similar way as reflected from the coupled channel formulation. 2016 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46444888002 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2 Vol.46 |
| title | Role of Projectile Degrees of Freedom in Sub-Barrier Fusion Dynamics |
| topic | Física, Astronomía y Matemáticas Heavy ion near Weakly bound nuclei barrier fusion reactions Coupled channel equations |
| url | https://www.redalyc.org/articulo.oa?id=46444888002 |