Results 221 to 228 of about 35,712 (228)

Nonperturbative effects in inner-shell ionization

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1984
Abstract A theoretical investigation of ion-induced inner-shell ionization is described, in which some physical effects that are nonperturbative in nature are included within the formalism of perturbation theory. In particular, the effects of the dynamical response of the outer electrons under the influence of the incident projectile are considered ...
David J. Land, D. G. Simons
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Nonperturbative effects at small x

Nuclear Physics B - Proceedings Supplements, 1991
Abstract A review of existing data shows the importance of nonperturbative contributions, particularly to those structure functions that vary rapidly with χ. The connection between small χ behaviour and the rise with energy of total hadronic cross sections requires the presence of a term χ −1.085 rather than the conventional χ −1 .
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The Strength of Nonperturbative Effects in String Theory

1991
We argue that the leading weak coupling nonperturbative effects in closed string theories should be of order exp(— C/κ) where κ 2 is the closed string coupling constant. This is the case in the exactly soluble matrix models. These effects are in principle much larger than the exp(—C/κ 2 ) effects typical of the low energy field theory.
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Nonperturbative theory of inhomogeneous effects in gas lasers

IEEE Journal of Quantum Electronics, 1968
The self-consistent field approximation (SCFA)[1]-[4] is used to calculate the steady-state mode energies and frequency shifts for a gas laser. The SCFA is a statistical approximation which was shown[3] to be accurate for small values of a parameter ( \gamma^{2}N ), which is always small for gas lasers.
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