Thermodynamic parameters (∆Hº, ∆Gº, ∆Sº) and the activation energy (∆Es) were calculated to explain the limiting equivalent conductance (Λ0) and ion association constant (KA) of s-acetylthiocholine halides and perchlorate in acetonitrile at different temperatures by using conductance measurements. It has been evaluated by using Fuoss-Onsager equation. It is evident that the values of (Λ0) increase regularly with increase in temperature. For all salts of s-acetylthiocholine, (Λ0) indicates less solvation or higher mobility of the ions in all solvent systems studied. The free energy change ∆Gº values are negative for all salts (Br -, Iand ClO4 -). Clearly strengthening to interionic association at higher temperatures is largely caused by a decrease in the permitivity of the solvent. The positive values of (∆Hº) for three salts (Br -, Iand ClO4 -) show that the association processes are endothermic in nature. Entropy change (∆Sº) values are positive for all salts indicate the randomness of ions in all solvent systems studied.
Even-even near-spherical vibrational nuclei, with energy ratio = + + + + / / R E E 4 2 4 2 1 1 1 1 in the range 2-2.5, are investigated within the framework of interacting boson model and q-deformed version of this model, using the ( )U 5 dynamical symmetry. The parametrization of the ( ) U 5 Hamiltonian and q-deformed version are found leading to a description of energy spectra of 33 nuclei with a root mean square deviation from the experimental level energies less than 100 keV. The findings support the fact that we are very near to the critical point symmetries in the real q-deformed vibrational Hamiltonian.
The differential cross sections of elastic and inelastic scattering of 3 He ions on 13 C and 14 C have been studied at an energy of 37.9 MeV with a double folding model based on M3Y-Reid effective nucleon-nucleon interaction. The resulted parameters have been used for the standard Distorted Wave Born Approximation calculations of angular distributions corresponding to different excitations levels of 13 C and 14 C and deformation parameters have been deduced.
A simple systematic procedure to construct the three-level unitary and orthogonal algebras which appear in the bosonic three -level pairing models and for arbitrary choice of level degeneracies is presented. We draw attention to the existence of the three types of dynamical symmetry. The new analytical expressions of the energies are derived. The results presented show very clearly the duality between orthogonal algebras and the quasi-spin algebras for the three-level system with pairing interactions. The seniority selection rules of the transition operators in three level boson system are given. Illustrative calculations are carried out for U 21 algebra.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.