Two-proton radioactivity with 2p halo is reported theoretically in light mass nuclei A $=$ 18-34. We predict $^{19}$Mg, $^{22}$Si, $^{26}$S, $^{30}$Ar and $^{34}$Ca as promising candidates of ground state 2p-radioactivity with S$_{2p}$ $<$ 0 and S$_{p}$ $>$ 0. Observation of extended tail of spatial charge density distribution, larger charge radius and study of proton single particle states, Fermi energy and the wave functions indicate 2p halo like structure which supports direct 2p emission. The Coulomb and centrifugal barriers in experimentally identified 2p unbound $^{22}$Si show a quasi-bound state that ensures enough life time for such experimental probes. Our predictions are in good accord with experimental and other theoretical data available so far.Comment: 5 Pages, 5 figure

Ce doped ZnO nanoparticles have been synthesized by sol-gel method and their structural properties, surface morphology and Fourier transform infrared spectra (FTIR) are studied. The XRD measurements indicate that the prepared nanoparticles have a hexagonal wurtzite structure of undoped ZnO and the presence CeO 2 phase in doped ZnO samples. The calculated average crystallite size varies from 27 to 42 nm with increase in Ce concentrations. The absorption band observed 463 cm−1 is attributed to the ZnO stretching vibrations and EDX confirms the synthesis of undoped and Ce doped ZnO NPs.