261 research outputs found

    Comment on Universal Reduced Potential Function for Diatomic Systems

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    First principles prove why a recent claim by R.H. Xie and P.S. Hsu (Phys. Rev. Lett. 96, 243201 (2006)) on the scaling power of a covalent Sutherland parameter to expose a universal function cannot be validated.Comment: 1 page, at the UGent archive, 11 references, revised for publication in PR

    Spectroscopic Constants of Molecules I on the Ground State Frequencies of Diatoms of the Type XX

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    Velocity of Sound in Water as a Function of Temperature and Pressure

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    Symmetry breaking in covalent chiral bond Hsub2, according to accurate vibrational levels from Kratzer bond theory

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    Symmetry breaking in Hsub2, quantified with Kratzer bond theory, leads to vibrational levels with errors of only 0,00008 %. For quanta, 0,0011 % errors are smaller than with any ab initio QM method. Chiral behavior of covalent bond Hsub2 implies bonding between left- and right-handed atoms HsubL and HsubR or between hydrogen H and antihydrogen Hbar. This generic Hsub2 asymmetry is given away by a Hund-type Mexican hat curve, invisible in QM.Comment: 9 pages, 3 figures, 3 tables, 30 reference

    Effect of the Parabolic Confinement Potential on the Binding Energy of a Donor in a Double-Step Barrier Quantum Dot

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    Djelomična algebrizacija i odrezani Coulombov potencijal

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    We have applied partial algebraization technique to the cut-off Coulomb potential −Ze2/(r + β). It has been found that for a spin j representation 2j + 1 exact solutions are obtained but they belong to excited states of potentials for different values of β. Degeneracies observed in the spectrum have been compared with exact numerical results.Primijenili smo tehniku djelomične algebrizacije na odrezani Coulombov potencijal −Ze2/(r+β). Nađeno je da se za spin j dobiva 2j+1 točnih rješenja, koja pripadaju pobuđenim stanjima potencijala za različite vrijednosti β. Opažene degeneracije u spektru uspoređene su s točnim numeričkim rezultatima
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