Results 261 to 270 of about 9,958,589 (304)

Electron-impact excitation of Na

Physical Review A, 1988
Total and resonance electron-impact cross sections are obtained for Na in six-state (6CC) and four-state close-coupling (4CC) approximations for the electron energy range 3.5less than or equal toEless than or equal to150 eV. Accurate configuration-interaction target wave functions are employed to represent the ground state 3 /sup 2/S and the excited ...
openaire   +2 more sources

Electronic spectroscopy of the fluoroethylenes by electron impact

Chemical Physics Letters, 1974
Abstract Electron impact excitation spectra of the six fluorine-substituted ethylenes have been measured at impact energies of 20 eV or 25 eV and 40 eV and scattering angles from 0° to 80°. Each of these molecules shows an absorption maximum between 4.2 eV and 4.7 eV corresponding to a singlet→triplet, π→π * transition.
M.J. Coggiola, Oren A. Mosher, Wayne M. Flicker, Aron Kuppermann   +3 more
openaire   +1 more source

Dissociation of ethane by electron impact

Chemical Physics, 1975
The total dissociation cross section for methane is reported for electron energies between 10 and 500 eV. A maximum cross section of 4×10−16 cm2 occurs at 85 eV. Dissociation into ionic and neutral fragments have about equal probability for energies between 50 and 500 eV.
openaire   +1 more source

Impact-parameter method for electronic excitation of molecules by electron impact

Physical Review A, 1981
The semiclassical impact-parameter method is extended to study the electronic excitation of molecules by electron impact. The formalism describes the molecular electrons quantum mechanically but treats the collision classically using straight-line trajectories. The expression for the integrated cross section satisfies reciprocity.
openaire   +1 more source

Electronic spectroscopy by electron impact

2010
The design and construction of a high-resolution, low-energy and variable-angle electron impact spectrometer has enabled the study of the interaction between a low energy monochromatic electron beam and a series of atoms and molecules. Optically forbidden transitions have been studied for argon and neon.
openaire   +1 more source

The impact of services on electronic commerce

Seventh IEEE International Conference on E-Commerce Technology (CEC'05), 2005
There are significant shifts, both at business and technology levels, toward services. Companies are deconstructing their functions and requirements in terms of explicit services, and then managing their value nets accordingly. Service-oriented architectures, supported by Web service standards and technologies, are rapidly becoming a standard approach ...
openaire   +2 more sources

The impact of purchasing policy on electronic markets and electronic heirarchies

Information & Management, 1993
Abstract Markets and heirarchies are two mechanisms used by organizations to coordinate steps through the value chain. For the last twenty years information technology has been used to enhance both of these coordination structures. It has been suggested (Malone et al.) that the improvement of information technology price/performance will have a more ...
David Rosenthal, Shashi K. Shah, Baichun Xiao   +2 more
openaire   +2 more sources

The social impact of electronic commerce

IEEE Communications Magazine, 1999
To thrive in the Internet economy, companies need a new model for commerce that addresses requirements maximizing the lifetime value of a business relationship. Business activities that used to be well defined and structured will diffuse across the enterprise and among partners and customers.
openaire   +2 more sources

Electronic Excitation of Molecules by Electron Impact

1984
© 1984 Springer. This material is based upon work supported by the National Science Foundation under Grant No. PHY-8213992 and Grant No. INT-8219691 (Office of International Programs, U. S.-Brasil Program). The authors acknowledge computing support from the National Center for Atmospheric Research (NCAR) which is sponsored by the National Science ...
McKoy, Vincent, Lee, Mu-Tao
openaire   +2 more sources

The Impact of Electronic Financial Payments on Crime

SSRN Electronic Journal, 2012
It is widely believed that the growing use of electronic financial transactions should reduce physical vulnerability to crimes such as robbery and burglary. Using a sample of 49 countries over six years, we test this hypothesis using fixed effects (FE) and difference GMM estimators.
Laura E. Armey, Jonathan Lipow, Natalie J. Webb   +2 more
openaire   +3 more sources