Additions to the Spectra Lila, Lizb and LiZla.Six new spectral lines have been observed in the lithium spectrum between 200 nm and 600 nm. Possible classifications are given and discussed.
Electromechanical effect in a freely suspended film based on 4-n-octyl-4′-cyanobiphenyl has been detected by means of light scattering at both the first and second harmonics of the exciting electric field. Experimental studies on voltage and frequency dependencies of the optical response are carried out. Organic solvent vapor is shown to strongly affect the electromechanical response. A feasible mechanism for the electromechanical effect is discussed.
The effects of wall charge on firing voltage, V
f, and the statistical delay time of discharge, t
s, in plasma display panels were investigated. V
f, i.e., the ion-induced secondary electron emission, is independent of both the polarity and amount of wall charge. In contrast, t
s, i.e., the exoelectron emission, strongly depends on the wall charge and is smaller for a high positive wall charge, revealing the coexistence of trapped electrons and holes in the surface region. Positive charging of the MgO surface of the cathode side is effective to improve the response of the address discharge.
A set of coherent states of the semi-direct product N(2) 0 Sp(4, R ) of the Heisenberg-Wyl and symplectic groups is constructed; they are shown to be non-spreading two-dimensional wavepackets moving on closed classical trajectories. These states generalise in a natural manner the Glauber coherent states to the description, in the classical limit, of a particle in a rotating frame as well as of a charged particle in a uniform magnetic field. The properties of these states are studied.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.