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Photoionization and fragmentation of polyatomic molecules

Description: From chemical spectroscopy and photochemistry in the vacuum ultraviolet conference; Valmorin, Quebec, Canada (5 Aug 1973). The discussion of photoionization and fragmentation of polyatomic molecules covers experimental procedures, energy deposition, dissociation processes and the determination of thermochemical quantities, and diatomic and small and large polyatomic molecules. (JFP)
Date: January 1, 1973
Creator: Chupka, W.A.
Partner: UNT Libraries Government Documents Department

Measurement of earth medium electrical characteristics: techniques, results, and applications

Description: An overview of measurement techniques, measurement results, and factors influencing the conductivity and dielectric constant of earth medium is given. Application of these measurement techniques to geophysical investigations is also discussed. (auth)
Date: November 12, 1973
Creator: Lytle, R.J.
Partner: UNT Libraries Government Documents Department

MCP code fluorescence-routine revision

Description: A new method is described for treating fluorescence, which replaces the original subroutine of the Monte Carlo photon code (MCP), and eliminates its most undesirable features. The major changes include (a) elimination of the very inaccurats 1/E/sup 3/ law for photoelectric cross section, b) updating of relative intensities of K-fluorescence lines, (c) elimination of fluorescence from shells other than K and L, and (d) provision for secondary L-fluorescence. Except for the latter, the previous code is unchanged, as well as the storage format. However, the change in method is reflected in the new constants, which have been completely revised, and are included here in tabulated form. (auth)
Date: May 1, 1973
Creator: Everett, C.J. & Cashwell, E.D.
Partner: UNT Libraries Government Documents Department

BREM II: a code for calculating the free--free Gaunt factor in an arbitrary atomic potential

Description: Free-free absorption is one of the dominant mechanisms governing the absorption of laser radiation by materials heated to temperatures of 0.5 to 2.0 eV. This report describes the theory, the listing, and the running instructions for a code which computes the free-- free Gaunt factor, arising from any given ionic or atomic potential. The calculation makes use of partial wave expansion. The code is capable of computing up to 95 partial waves. The code computes the necessary low energy wave functions by making use of the Green's function solution rather than by directly integrating Schroedinger's equation. In addition to the Gaunt factor, the code also provides the amplitude and the phase shift of every partial wave considered. (auth)
Date: June 1, 1973
Creator: Green, J.M.
Partner: UNT Libraries Government Documents Department