134,985 research outputs found
Barium release system
A chemical system is described for releasing a good yield of free barium neutral atoms and barium ions in the upper atmosphere and interplanetary space for the study of the geophysical properties of the medium. The barium is released in the vapor phase so that it can be ionized by solar radiation and also be excited to emit resonance radiation in the visible range. The ionized luminous cloud of barium becomes a visible indication of magnetic and electrical characteristics in space and allows determination of these properties over relatively large areas at a given time
Rocket having barium release system to create ion clouds in the upper atmosphere
A chemical system for releasing a good yield of free barium atoms and barium ions to create ion clouds in the upper atmosphere and interplanetary space for the study of the geophysical properties of the medium is presented
Heavy Quark Production in Deep-Inelastic Scattering at HERA
We discuss two topics in the production of heavy quarks in deep-inelastic
scattering: the next-to-leading order Monte-Carlo HVQDIS and the
next-to-leading logarithmic resummation of soft gluon effects, including
estimates of next-to-next-to-leading order corrections therefrom.Comment: 10 pages, 10 figures, To appear in Proceedings of Monte Carlo
Generators for HERA Physics, Hamburg 1998/99 Figures update
Detection of high-energy X-ray flare from a source in Crux
Balloonborne X ray telescopic observation of point source in Cru
An Exact Solution for the Lattice Gas Model in One Dimension
A simple method to obtain a canonical partition function for one dimensional
lattice gas model is presented. The simplification is based upon rewriting a
sum over all possible configurations to a sum over numbers of clusters in the
system.Comment: 6 pages, LaTe
Setting priorities for stroke care and research
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/99062/1/ijs12153.pd
Continual variations in the high energy X-ray flux from Sco X-1
Balloon X ray observations of intensity fluctuations in Sco X-
X-ray line emission from the Tycho supernova remnant
The observation of the X-ray spectrum of the Tycho supernova remnant in the energy range 0.5 to 20 keV is discussed. Four significant line features in the spectrum: The K alpha lines of silicon, sulphur, and iron; and the L lines of iron are examined. Comparisons between the silicon and sulphur equivalent widths and K alpha iron line energies of Tycho and Cas A are discussed. Suggest that the X-ray emitting plasma in Tycho is further from collisional ionization equilibrium than that of Cas A
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