Results 251 to 260 of about 4,289,395 (298)

Potential energy curves: A simple and rapid method

Journal of Molecular Structure: THEOCHEM, 1984
Abstract The true potential energy curves for different electronic states of diatomic molecules have been constructed by a simplified and modified form of the Jarmain method. To check the validity of this new procedure potential energy curves are constructed for NO + , VO, Si 2 , AsO, AsO + , PF + , CO and Bi 2 .
R.R. Reddy, A.S.R. Reddy, T.V.R. Rao
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Approximation Method for High-Energy Potential Scattering

Physical Review, 1956
An approximation method for high-energy potential scattering is developed that expresses the scattered amplitude in terms of a quadrature, similar to the Born approximation but superior to it in accuracy. It is valid when the potential is slowly varying compared to a wavelength, $\frac{|V|}{{E}^{\ensuremath{'}}}$ is small compared to unity ...
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Approximation methods for low-energy potential scattering

Nuclear Physics A, 1975
Abstract A systematic method is developed for short-range central potentials, to obtain the coefficients of the momentum expansion of wave function and scattering amplitude for any value of the angular momentum. The corresponding effective range solution and Pade approximants for the k -variable expansion of the S -matrix are studied.
C.R. Garibotti, J.A. Mignaco
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Energy levels of the laser-dressed Coulomb potential by the potential envelope method

Journal of Physics B: Atomic, Molecular and Optical Physics, 1994
The method of potential envelopes is employed to approximate the bound-state energies of the Schrodinger Hamiltonian, - Delta - upsilon /(r2+ lambda 2)12/. It is shown that the simple formula E=minr>0(P2/r2- upsilon /(r2+ lambda 2)12/) provides upper bounds to the energies if P=(2n+l-1/2) and lower bounds when P=(n+l), with accurate values found by ...
J P Duarte, R L Hall
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Potential Energy Methods

1981
The application of potential energy methods is primarily directed towards the determination of sets of unknown deflexions and, as such, is an equilibrium approach to structural analysis.
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An approximation method for high-energy potential scattering

Nuclear Physics, 1964
A simple approximation method is proposed to investigate the scattering of high-energy Schrodinger particles by some spherically symmetrical potentials which have no sharp boundaries but whose shapes do not deviate much from a square well form. The method is applicable when the strength of the potential is substantially smaller than the incident energy
Nishida, Yoshihiko, Shimauchi, M., Tanaka, Hiromi   +2 more
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Modelling of potential energy curves for diatomics: Reference molecular potential method

Chemical Physics Letters, 1985
A method is suggested for modelling the potential energy curves of diatomics. It involves a search for the mapping which transfers the structural details from an analytically prescribed reference potential. For the ground-state potentials of seven covalent molecules, the accuracy in describing the spectroscopic region is comparable with the best ...
I.K. Dmitrieva, V.A. Zenevich, G.I. Plindov   +2 more
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Potential energy integrals in semiempirical MO methods

International Journal of Quantum Chemistry, 1974
AbstractThe two‐center core‐electron attraction integral VAB in zero‐differential overlap semiempirical MO methods is examined. It is concluded that core‐valence orthogonality and valence symmetrical orthogonalization effects must be considered, and that these effects provide justification for the CNDO/2 approximation VAB = ZBγAB.
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Modified bielectronic potential method for correlation energy

International Journal of Quantum Chemistry, 1979
AbstractLöwdin's correlation potential formalism has been used to define a modified bielectronic potential, allowing one to calculate the exact electronic energy, given the Hartree–Fock wave function. This modified potential is in principle peculiar to each electronic system, and is defined by a correlation factor depending on the interelectronic ...
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Solar energy potential calculation methods

RE&PQJ
Several European municipalities developed an information map called solar cadaster that provide qualitative information for the citizens about the possible locations and amount of the small scale household solar PV system installations. The objective of these cadasters is the promotion and fostering of the distribution of the PV systems.
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