12 research outputs found
Synthesis and spectral properties of colloidal solutions of metal sulfides
Cadmium, lead, and zinc sulfides as well as cadmium and lead (cadmium and zinc) complex sulfides have been synthesized in the colloidal state by reaction of metal trifluoroacetates with thioacetamide in ethyl acetate and methylmethacrylate. Synthesis products have been isolated from the reaction solutions and studied by X-ray diffraction, vibrational and electronic spectroscopy, and electronic microscopy. The effect of the composition on spectral properties of formulations has been discussed. The formation of colloidal particles and the stability of solutions are related to the complexation
Gross shell structure at high spin in heavy nuclei
Experimental nuclear moments of inertia at high spins along the yrast line
have been determined systematically and found to differ from the rigid-body
values. The difference is attributed to shell effects and these have been
calculated microscopically. The data and quantal calculations are interpreted
by means of the semiclassical Periodic Orbit Theory. From this new perspective,
features in the moments of inertia as a function of neutron number and spin, as
well as their relation to the shell energies can be understood. Gross shell
effects persist up to the highest angular momenta observed.Comment: 40 pages total; 22 pages text, 19 figures sent as 27 .png file
Clustering mechanism in fission and CCT channel formation
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Gross shell structure of moments of inertia
Average yrast moments of inertia at high spins, where the pairing correlations are expected to be largely absent, were found to deviate from the rigid-body values. This indicates that shell effects contribute to the moment of inertia. We discuss the gross dependence of moments of inertia and shell energies on the neutron number in terms of the semiclassical periodic orbit theory. We show that the ground-state shell energies, nuclear deformations and deviations from rigid-body moments of inertia are all due to the same periodic orbits
Synthesis and spectral properties of colloidal solutions of metal sulfides
Cadmium, lead, and zinc sulfides as well as cadmium and lead (cadmium and zinc) complex sulfides have been synthesized in the colloidal state by reaction of metal trifluoroacetates with thioacetamide in ethyl acetate and methylmethacrylate. Synthesis products have been isolated from the reaction solutions and studied by X-ray diffraction, vibrational and electronic spectroscopy, and electronic microscopy. The effect of the composition on spectral properties of formulations has been discussed. The formation of colloidal particles and the stability of solutions are related to the complexation