Incomplete fusion reactions: Analysis of excitation functions and recoil range distributions in 16^{16}O + 51^{51}V

Incomplete fusion reactions were investigated by measuring the excitation functions of nine evaporation residues in $^{16}$O + $^{51}$V reaction in the beam energy 4-6 MeV/amu, using the well-known recoil catcher technique and gamma-ray spectrometry. The experimental data were compared with that obtained from Monte Carlo simulation calculations using the PACE2 code. The results indicate the presence of incomplete fusion process in the production of two alpha emission products. This was further confirmed by the measurement of recoil range distribution of these isotopes at 96 MeV beam energy. Calculations of the average angular momentum associated with these products revealed the peripheral nature of these ICF reactions

Energy spectra and angular distribution of projectile-like fragments in 84 MeV \chem{^{12}C +{} ^{169}Tm}

Kinetic-energy spectra and angular distribution of projectile-like fragments have been measured in the reaction of 84 MeV \chem{^{12}C} on \chem{^{169}Tm}, using the surface barrier silicon-based $\Delta E$-$E$ telescopes. The fragments close to the projectile show typical spectra of quasi-elastic transfer reactions, which were found to be in agreement with the calculations based on the direct surface transfer reaction model. A significant cross-section of fast alpha-particles was found at forward angles, reminiscent of incomplete fusion reactions, which could be explained in terms of the direct surface transfer reaction model after taking into account the level density of continuum states in the heavy reaction product. The results have been explained in terms of the continuous evolution of the reaction mechanism as a function of the mass transfer

Angular distributions and cross-sections of projectile-like fragments in the

The angular distribution of projectile-like fragments (PLFs) in the 19F + 159Tb reaction have been measured at beam energy equal to 98MeV. Angular distributions of PLFs showed a systematic change with increasing mass transfer, starting from the peaking at grazing angle for heavier PLFs to very forward peaked angular distributions for lighter PLFs. Cross-sections of the different PLFs were obtained by integrating their centre-of-mass angular distributions. The PLF cross-sections have been compared with the incomplete fusion cross-sections obtained from the earlier measurement of the evaporation residue cross-section. Reduced cross-sections for lighter PLFs were observed to be higher compared to those observed in 19F + 66Zn reaction at similar values of E cm/V b. Also, elastic scattering measurements were carried out to get information about the grazing angle and total reaction cross-section

Effect of projectile structure in incomplete fusion in

Cross-sections for projectile-like fragments (PLFs) have been measured in the 24Mg$+$59Co reaction at E lab = 93 , 100 and 108MeV to investigate the projectile structure effect in incomplete fusion (ICF) reactions. In this study, the cross-sections for ICF channels involving the emission of Ne, O and C were found to be higher than the other ICF channels involving the emission of odd Z PLFs. This observation was attributed to the alpha cluster structure of the 24Mg nucleus. Significant cross-sections for incomplete fusion reactions at these beam energies indicated that the collision trajectories with l < l crit are contributing to ICF

Study of excitation functions and insights into the reaction mechanisms of

Fusion phenomena in heavy-ion reactions involving all kinds of projectile and target are still an engrossing quest due to the appearance of numerous mass and energy sharing processes. Hitherto, it is required to have more experimental studies to contemplate fusion mechanisms, which are necessary to unfold. In this endeavour, for the first time, a measurement of residual cross sections from $$^6$$Li induced reaction on $$^{\text {nat}}$$Cu has been presented in this article within the 3.6–7.1 MeV/nucleon energy range. The residues $$^{69,67,66}$$Ge, $$^{68,67,66,65}$$Ga, and $$^{65,63,62}$$Zn produced in the reaction have been identified by the $$\gamma$$-ray spectroscopy. The measured excitation function of the residues has been analyzed using equilibrium and pre-equilibrium reaction models in the framework of PACE

Backscattering spectrometry studies on metal ion distribution in polymer inclusion membranes

Polymer inclusion membranes based on cellulose triacetate polymer, containing 2-nitrophenyloctyl ether as plasticizer and dinonyl napthalene sulfonic acid as cation exchanger were loaded with Cs+ and Ag+ and were studied by backscattering spectrometry technique to measure the distribution of the metal ions across the membrane using a proton beam. The study showed that the distribution of the metal ions across the membrane is uniform, thereby suggesting the uniform distribution of the cation exchanger. This indicates that the hydrophilic nature of the sulfonic acid group in the cation exchanger does not significantly influence its distribution in the predominantly hydrophobic matrix of cellulose triacetate. However, the microstructure of the membrane, obtained by atomic force microscopy, shows the formation of blobs on the surface of the PIM indicating the inhomogeneity at the sub-micron scale