The effect of changes in the shape of the presynaptic action potential on neurotransmission was examined at synapses between granule and Purkinje cells in slices from the rat cerebellum. Low concentrations of tetraethylammonium were used to broaden the presynaptic action potential. The presynaptic waveform was monitored with voltage-sensitive dyes, the time course and amplitude of presynaptic c...

We report measurements of the valence band width in compressed Ge determined from x-ray emission spectra below the Ge K edge. The width of the valence band does not show any pressure dependence in the semiconducting diamond-type structure of Ge below 10 GPa. On the other hand, in the metallic beta-Sn phase above 10 GPa the valence band width increases under compression. Density-functional calcu...

In this work, the propagation of solitons in single-mode optical fibers has been investigated theoretically by using the nonlinear Schrödinger equation. This equation combines the effects of group velocity dispersion and self-phase modulation present in optical fibers and also takes into account the loss of optical fiber. The nonlinear Schrödinger equation has been solved numerically by using t...

2014 The longitudinal magnetoresistance is calculated in the quantum limit in the case of a point like interaction between electrons and donors. We account for the influence of the bound states on 03C3zz The position and width of donor states are derived, and the effects of collision broadening are discussed. LE JOURNAL DE PHYSIQUE TOME 39, JANVIER 1978, Classification Physics Abstracts 72.20M

We determine mass and transverse momentum spectra of dileptons produced in Pb+Au (158 GeV/u) collisions within a pion annihilation model. A fit to the data requires simultaneous mass reduction and broadening of the in-medium rho propagator. The introduction of a finite pion width, as required within self-consistent approaches to the interacting pion gas, further improves the agreement with the ...

Abstract. The results of resonance particle productions (ρ0, ω, K∗, φ, Σ∗, and Λ∗) measured by the STAR collaboration at RHIC from various colliding systems and energies are presented. Measured mass, width, 〈pT 〉, and yield of those resonances are reviewed. No significant mass shifts or width broadening beyond the experiment uncertainties are observed. New measurements of φ and ω from leptonic ...

We derive an expression in terms of cylinder functions for the shape of a nonlinear resonance in a two-level system with a rapidly decaying level. We show that when the natural linewidth is negligible, the square of the total width is the sum of squares of the power and diffusion widths. The traditional variational approximation yields a correct value for the full width at half maximum, but dis...

Radiative opacity of open-M-shell germanium plasmas in the L-shell photon energy region were investigated in detail by using a fully relativistic detailed level accounting approach. Among other physical effects such as relativistic and the interaction between fine-structure levels belonging to the same non-relativistic configuration and different configurations, particular attention is paid on ...

The spectrum of the depolarized Rayleigh light scattered by a gas of linear molecules is calculated by a kinetic theory approach based on the Waldman-Snider equation. Collisional and diffusional broadening are studied. The line width is related to relaxation coeff icients which are collision brackets obtained from the linearized Waldmann-Snider collision term involving the binary molecular scat...