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Mass formula
About: Mass formula is a research topic. Over the lifetime, 1248 publications have been published within this topic receiving 22043 citations.
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TL;DR: In this paper, the ground state correlation energies associated with collective surface and pairing vibrations are calculated for Pb and Ca isotopes and it is shown that this contribution, when added to those predicted by one of the most accurate modern nuclear mass formulae (HFBCS MSk7 mass formula), reduces the associated rms error by an important factor, making mean field theory, once its time dependence is taken into account, a quantitative predictive tool for nuclear masses.
Abstract: The ground-state correlation energies associated with collective surface and pairing vibrations are calculated for Pb and Ca isotopes It is shown that this contribution, when added to those predicted by one of the most accurate modern nuclear mass formulae (HFBCS MSk7 mass formula), reduces the associated rms error by an important factor, making mean-field theory, once its time dependence is taken into account, a quantitative predictive tool for nuclear masses
13 citations
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TL;DR: In this article, a variational technique for describing the bulk properties of neutron and nuclear matter is extended to the case of a nucleon fluid with arbitrary proton to neutron ratio.
Abstract: A lowest-order constrained variational technique previously used by the authors to describe the bulk properties of neutron and nuclear matter is extended to the case of a nucleon fluid with arbitrary proton to neutron ratio. Calculations with the Reid soft-core potential are performed and a value of the symmetry coefficient in the semi-empirical mass formula is obtained. Inclusion of the saturating effect of the Delta (1236) described by Green and collaborators is shown to improve this value.
13 citations
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TL;DR: In this article, an alternative approach for finding exact solutions of Schrodinger equations with a position-dependent mass is presented, which consists in transforming the positiondependent mass Schroffinger equation into a standard constant mass Schroidinger equation.
Abstract: In this work, an alternative approach for finding exact solutions of Schrodinger equations with a position-dependent mass is presented. Essentially, the method consists in transforming the position-dependent mass Schrodinger equation into a standard constant mass Schrodinger equation. The constant mass equation is formulated in terms of a new variable and includes, as effective potential, a term related to the position-dependent mass and another term connected with the original potential. For exactly solvable potentials, our proposal leads to a Riccati equation for an equivalent Witten superpotential, which means that this kind of problems can be studied within the quantum supersymmetric framework with the aim to find the explicit solutions and the energy spectra. To show the usefulness of the proposed approach, we consider the particular case of exactly solvable Schrodinger equations for different position-dependent mass situations in a null potential. However, the method can directly be applied to other effective potentials as well as to find isospectral potentials for specific position-dependent mass distributions. © 2007 Wiley Periodicals, Inc. Int J Quantum Chem 107: 3039-3045, 2007
13 citations
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TL;DR: In this paper, the authors discuss the entropy and transformation properties of extremal N = 2 black hole solutions in supergravity theories associated with the minimal coupling models CP(n - 1,1).
Abstract: We discuss the entropy and the transformation properties of classical extremal N=2 black hole solutions in supergravity theories associated with the minimal coupling models CP(n - 1,1). The entropy is given by a manifestly invariant quantity under the embedding of the duality group SU(1,n) into Sp(2n + 2) which is a symmetry of the classical BPS mass formula.
13 citations
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TL;DR: The mass excesses of 19 Na and 23 Al have been measured with the (3 He, 8 Li) reaction as mentioned in this paper, and the values obtained are 12928 ± 12 keV and 6767 ± 25 keV, respectively.
13 citations