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Rate Constants for the Quenching of Excited States of Metal Comple...

By: Morton Z. Hoffman

Technical Reference Publication

Introduction: Over the past 30 years, the photochemistry and photophysics of metal coordination complexes have been active areas of research, drawing upon and merging with the extensive experience of coordination chemists, spectroscopists, and organic photochemists with regard to the synthesis of compounds, the development of experimental techniques, and an understanding of the kinetics and theories of excited states. The development during this 'time of fast kinetics te...

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Hermodynamic Properties of Argon from the Triple Point to 1200 K

By: Richard B. Stewart

Technical Reference Publication

Introduction: Whenever the subject of a new correlation for thermo properties of argon is mentioned, it is usually with a general lack of enthusiasm. The molecular chemically inert behavior of argon, coupled with widespread commercial use, suggest that there should be little uncertainty about its thermodynamic behavior. Argon is often used as a calibration or test fluid for an apparatus for thermophysical property measurement. Though there is such a large quantity of mea...

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Reduction Potentials of One-Electron Couples Involving Free Radicals

By: Peter Wardman

Technical Reference Publication

Introduction: Many reactions of free radicals involve one-electron transfer. If an electron acceptor, A is reduced to a radical, As- then the possibility of further or competing reactions involving other electron acceptors, B, C etc.: can be calculated if the one-electron reduction potentials E0(A/A.-), Eo(B/B.-) etc. are known. Thus the equilibrium constant, K, for reaction I is related to the difference AEl between the couples: by the expression AGY = -nFAE: = -RTlnK, ...

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Cross Sections and Related Data for Electron Collisions with Hydrogen

By: H. Tawara

Technical Reference Publication

Introduction: A number of experimental and theoretical investigations of collision processes involving hydrogen molecules and molecular ions in electron impact have been and are still being performed extensively because they are of the most fundamental importance in electron-molecule collisions. Indeed, understanding of electron-molecule collision processes is requisite in many applications such as chemistry, astrophysics, astrochemistry, plasma fusion research, and plas...

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Spectroscopy and Structure of the Alkali Hydride Diatomic

By: William C. Stwalley

Technical Reference Publication

Introduction: In the past decade there has been a surge in interest in the alkali hydrides. For example, as seen from Tables 1.1 and 2.1, nearly all of the experimental advances occurred in the 1980s; fifty percent of the references cited in this paper are from the past ten years. Although valuable compendia on the alkali hydrides are available [HER 50, GAY 68, ROS 70, HUB 791, their coverage is not confined to the alkali hydrides and does not include the many contributi...

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Kineties and Mechanisms of the Gas-Phase Reactions

By: Roger Atkinsoll

Technical Reference Publication

Introduction: Measurements made during the 13 years have shown the nitrate (NOS) radical to be present in the nighttime stratosphere and troposphere.-20 In the lower troposphere over continental areas the reported NO3 radical mixing ratios range from < 2 parts-per-trillion (ppt). The NO3 radical mixing ratios in marine air masses in the troposphere are low, with upper limits of c 0.5 ppt being reported by Platt and Perne.

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Oiabilitiess F Solids and Liquids of Low Volatility in Supercritic...

By: K.D. Bartle

Technical Reference Publication

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Critical Analysis of Heat-Capacity Data and Evaluation of Thermody...

By: George T. Furukawa

Technical Reference Publication

Introduction: This publication on the noble-metal transition elements is the second in a series of reviews sponsored by the Office of Standard Reference Data, presenting critical analysis of heat-capacity data m the temperature. The objective of this phase of work is to select best estimates for the values of the heat capacity over the temperature range 0 to 300 K, and to present tables of thermodynamic functions derived from these values. The information has broad appli...

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Quantum Yields for the Photosensitized Formation of the Lowest Ele...

By: Francis Wilkinson

Technical Reference Publication

Introduction: Ground state molecular oxygen, O2, is well known to be highly reactive and essential for animal respiration. Its properties have been actively studied for more than 200 years. However the properties of its lowest electronically excited state has only been actively investigated during the last three decades. This is illustrated in the book entitled Singlet Molecular Oxygen1 where Paul Schaap collects 28 Benchmark papers covering the period 1924-1973 which te...

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The Thermodynamic Behavior of the C02-H20 System

By: J.W. Gallagher

Technical Reference Publication

Introduction: Argon plasmas are widely used for fundamental plasma spectroscopy studies as well as for numerous applications involving technical plasmas, such as gas lasers and spectrochemical investigations with inductively coupled plasmas (ICPs). Thus the requisite spectroscopic data for ArI and 11-principally atomic transition probabilities and lifetimes of various energy levels-have been the subject of numerous investigations. Nevertheless...

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Estimation of the Heat Capacities of Organic Liquids as a Function...

By: Vlastimil Riicka

Technical Reference Publication

Introduction: This paper is the second part of a communication on the group-additivity method for the estimation of the heat capacities of liquids as a function of temperature. The main objective of the project was to develop a second-order group-additivity method for organic compounds including both hydrocarbons and non-hydrocarbons. The method follows the definition of groups according to Benson and coworkers.

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Electron Interactions with C, F

By: L.G. Christophorou

Technical Reference Publication

Introduction: In three earlier papers In this series we synthesized, evaluated, and extended the available information on electron collision processes with CF, CHF3, and CC12F2. We have continued this effort to provide the most accurate information available on the electronic interactions of gases of interest to the semiconductor industry, and in this paper we report on perfluoroethane (C2F6, hexafluoroethane). Perfluoroethane is a man-made gas with many applications. It...

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Electron Interactions with C12

By: L.G. Cnrtstoehorou

Technical Reference Publication

Introduction: Molecular chlorine (C12) is a plasma processing gas (e.g., see Refs. 1-24). It is used in plasma etching of semiconductors where the C1 atoms produced in a gas discharge efficiently etch a silicon surface. The dominant primary electron interaction processes are taken to be single-step electron impact ionization of C12 and C1, dissociation of C1, into neutrals, and dissociative attachment to C12 17'0,13317 The basic species involved in C12 plasmas, then, are...

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Critical Properties and Vapor Pressure Equation for Alkanes Cnh2N+...

By: Eric W. Lemmon

Technical Reference Publication

Introduction: Numerous equations can be used to represent the vapor pressure pl+g of a pure fluid (e.g., Ambrose, 1980, 1986, Ambrose and Tsonopoulos, 1995, Iglesias-Silva et al., 1987, Ruzicka and Majer, 1996). Of particular significance is the empirical equation proposed by Wagner (1974) and Wagner et al. The subscript c identifies the critical condition and the ai are adjustable parameters determined by regression analysis. The critical pressure and temperature are in...

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Do Not Circulate Permanent Retention

By: Gerry Edwards

Introduction: The development of nuclear explosives requires simultaneous technology development in several broad areas. Work done to fulfill these goals will be accompanied by technological observable that may be broadly classified into a limited number of categories. A program to develop nuclear weapons would include the following elements...

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New Englander and Yale Review : Volume 0016, Issue 64 November 185...

By: W. L. Kingsley

Description:The Yale Review is the self-proclaimed oldest literary quarterly in the United States. It is published by Yale University.

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Nasa Langley Scientific and Technical Information Output2002: by S...

Description: This document contains information regarding topics such as Space Sciences (General), Lunar and Planetary Science and Exploration, and Category 93 Space Radiation...

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Wind-Us Users Guide: by National Aeronautics and Space Administration

Description: This document contains information regarding topics such as ACCELERATE Convergence Acceleration (Block), ACTUATOR/SCREEN Discontinuous Change Across A Zone Boundary (Block), and ARBITRARY INFLOW Arbitrary Inflow (Block).

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Factors Affecting Aerosol Sampling

By: Paul A. Baron

INTRODUCTION: The American Conference of Governmental Industrial Hygienists (ACGIH) [2], the International Organization for Standardization (ISO) [3], and the European Standardization Organization (Comite Europeen de Normalisation, CEN) [2,3] have adopted identical particle size-selective sampling conventions for inhalable, thoracic, and respirable aerosols (Figure 1). The purpose of these conventions is to provide a scientific basis for a new generation of particle size...

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The Molar Volume (Density) of Solid Oxygen in Equilibrium with Vapor

By: H.M. Roder

Technical Reference Publication

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