The dynamics of the reactions forming compound nuclei using loosely bound projectiles is analysed within the framework of dynamical cluster decay model (DCM) of Gupta and Collaborators. We have analysed different reactions with $^{7}Li$, $^{9}Be$ and $^{7}Be$ as neutron rich and neutron deficient projectiles, respectively, on different targets at the three $E_{lab}$ values, forming compound nuclei within the mass region A$\sim 30-200$. The contributions of light particles LPs ($A\le4$) cross sections $σ_{LP}$, energetically favoured intermediate mass fragments IMFs ($5 \le A_2 \le 20$) cross sections $σ_{IMF}$ as well as fusion-fission $\it{ff}$ cross sections $σ_{ff}$ constitute the $σ_{fus}$ (=$σ_{LP}$+$σ_{IMF}$+$σ_{ff}$) for these reactions. The contribution of the emitted LPs, IMFs and ff fragments is added for all the angular momentum upto the $\ell_{max}$ value, for the resepctive reactions. Interestingly, we find that the $ΔR^{emp}$, the only parameter of model and uniquely fixed to address the $σ_{fus}$ for all other reactions having $\it same$ loosely bound projectile at the chosen incident energy. It may be noted that the dynamical collective mass motion of preformed LPs, IMFs and ff fragments or clusters through the modified interaction potential barrier are treated on parallel footing. We see that the values of modified interaction barrier heights $ΔV_{B}^{emp}$ for such reactions are almost of the same amount specifically at the respective $\ell_{max}$ values.
Breakup reactions are one of the favored probes to study loosely bound nuclei, particularly those in the limit of stability forming a halo. In order to interpret such breakup experiments, the continuum discretized coupled channel method is typically used. In this study, the first Bayesian analysis of a breakup reaction model is performed. We use a combination of statistical methods together with a three-body reaction model (the continuum discretized coupled channel method) to quantify the uncertainties on the breakup observables due to the parameters in the effective potential describing the l…
For one-neutron halo nuclei, the cross section for elastic scattering and breakup at intermediate energy exhibit similar angular dependences. The Recoil Excitation and Breakup (REB) model of reactions elegantly explains this feature. It also leads to the idea of a new reaction observable to study the structure of loosely-bound nuclear systems: the Ratio. This observable consists of the ratio of angular distributions for different reaction channels, viz. elastic scattering and breakup, which cancels most of the dependence on the reaction mechanism; in particular it is insensitive to the choice …
We have studied the fragment yields emitted from the fragmentation of excited projectile nuclei in peripheral collisions of 136Xe+Pb at 1 GeV/nucleon, and measured with the high-resolution magnetic spectrometer, the Fragment Separator (FRS) of GSI. The mass, charge and isotope distributions of nuclear fragments formed in the reactions were calculated within a statistical ensemble approach and compared to the experimental data. The ensemble of excited projectilelike source nuclei were created in the framework of a previous analysis of similar reactions performed at 600 MeV/nucleon (ALADIN-exper…
在动力学模型的框架下，研究了入口道在产生几乎相同超重复合核的聚变-裂变反应中的作用。计算了可能导致超重元素Z=114的$^{48}$ Ca + $^{244}$ Pu和$^{74,76}$ Ge + $^{208}$ Pb反应。它示出，对于这些反应有一个能量窗口的值的轰击能量的捕获概率是足够大的。结合来自聚变本征势垒的限制，它有助于找到给定弹靶组合的最佳轰击能量值。
本文讨论了松约束弹的破碎过程在垒下聚变反应中的作用。通过对粒子连续态进行能量离散，对$^{11}$ Be + $^{208}$ Pb和$^{4,6}$ He + $^{238}$ U反应进行了耦合通道计算.计算结果表明，与分裂通道的耦合有两种效应，即通量损失和聚变势的动力学调制。它们的净效应因能源区域而异。在库仑势垒以上的能量，前者的效果占主导地位，后者和截面完全融合相比，没有耦合的情况下，受阻。另一方面，在势垒以下，后者的影响比前者大得多，从而增强了完全熔合截面。
The model for the cold-fusion reactions related to the synthesis of super-heavy nuclei in collisions of heavy projectile-nuclei with $^{208}$Pb target nucleus is discussed. In the framework of this model the production of the compound nucleus by two paths through, the di-nuclear system and the fusion way, are taken into account simultaneously. The formation of the compound nucleus in the framework of the di-nuclear system is related to the transfer of nucleons from the light nucleus to the heavy one. The fusion way is linked to the sequential evolution of the nuclear shape from the system of c…
