Quantum dots of CdS and Ni-doped CdS were synthesized through chemical precipitation method using a high-boiling solvent. Nanocrystallinity of the as prepared nanostructure is confirmed using X-ray diffraction (XRD). The mean crystal size obtained by full-width half maxima (FWHM) analysis is 3.33 nm for CdS, 3.37 nm for CdS:Ni (2 mM) and 3.39 nm for CdS:Ni (4 mM). The electrical conductivity data reveal semiconducting behaviour of both pure CdS and Ni-doped CdS nano-crystals. The optical absorption analysis conducted in UV-vis range 200-900 nm reveals the transparency of these nanocrystals in entire visible range but not in ultraviolet range. The results based on optical analysis yield band gap values as 2.65 eV for CdS, 2.59 eV for CdS:Ni (2 mM) and 2.53 eV for CdS:Ni (4 mM) nanoparticles. This implies that pure CdS and Ni doped CdS are blue shifted with respect to the bulk CdS (2.42 eV); however, Nickel doped CdS nanocrystals are red shifted with respect to pure CdS nanocrystals.

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The excitation functions of radio-nuclides have been measured for the 20Ne + 55Mn system in the energy range ≈51–164 MeV by employing the recoil catcher technique followed by off-line gamma-ray spectrometry. It has been observed that some of the residues produced directly via complete and/or incomplete fusion (ICF) give rise to independent yield while some of the residues are produced in the decay of higher charge precursor isobars through β+ and/or electron capture and give rise to cumulative yield. Independent yields of radio-nuclides 71, 70As, 69, 67Ge and 67, 66Ga have been separated out from the measured cumulative yields. The measured excitation functions are then compared with statistical model code PACE-2. It has been observed that excitation functions of the measured complete fusion channels are in good agreement with theoretical predictions. However, a significant enhancement in the measured excitation functions for the residues, produced in the break-up of the projectile into α-clusters, has been observed. This enhancement may be attributed to the ICF process. Moreover, ICF-fraction has also been calculated by dividing the ICF-cross-section to the total fusion cross-section and found to increase with the projectile energy as well as with the entrance channel mass-asymmetry of the interacting partners.