Topics: Radio Program, Paper products, Electrical components, Legal professions, Quantum mechanics,...
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May 23, 2018
05/18
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Olah, George A. (George Andrew), 1927-;Schleyer, Paul von R., 1930- joint author
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xii, 1501-1960 p. : 24 cm
Topics: Carbonium ions, Carbonium, Carbonium ions, Carbocations
Detailed calculations were performed of the deposition of energetic oxygen ions into the atmosphere of Jupiter. A Monte Carlo simulation was used. Similar processes occur in other astrophysical environments to which our methods can be applied. In particular Cravens has suggested that the X-ray emissions seen from comets are due to transitions from excited states following capture of electrons by solar wind ions colliding with the atmosphere of the comet. Alternative proposals have been advanced...
Topics: NASA Technical Reports Server (NTRS), ASTROPHYSICS, COMETS, JUPITER ATMOSPHERE, OXYGEN IONS,...
Mossbauer research using the 21.54 kev resonance radiation of Eu-151 on the high temperature superconductors Bi(2)Ca(0.5)Eu(0.5)Sr(2)CU2O(x), and EuBa(2)CU(3)O(7-x) is performed. For the Bismuth compound the Mossbauer measurements gave a weak signal at room temperature but improved at lower temperatures. Experimental data indicated that europium is located at only one crystallographic site. Isomer shift measurements were .69 + 0.02 mm/s with respect to EuF(3). The linewidth at room temperature...
Topics: NASA Technical Reports Server (NTRS), HIGH TEMPERATURE SUPERCONDUCTORS, TRANSITION TEMPERATURE,...
Epithermal neutron flux maps of the equatorial region near Schiaparelli Crater in Mars eastern hemisphere indicate hydrogen ion concentrations in the shallow subsurface. Published maps of these hydrogen concentrations reveal anomalous linear concentrations of hydrogen with a northeast to southwest trend. The width and trend of these linear anomalies matches the width and trend of the graben between Scylla Scopulus and Charybdis Scopulus further to the south, west of Hellas Basin. These...
Topics: NASA Technical Reports Server (NTRS), HYDROGEN IONS, ION CONCENTRATION, MARS SURFACE, STRUCTURAL...
Electrical conductance data in the temperature range 25 to -35 C, analyzed by the Fuoss-Kraus triple-ions theory of conductance, reveal the presence of both ion pairs and triple ions. Evidence of the presence of the latter ones persists (with the formation constant K sub T somewhat increased) even by allowing for measured change of solvent permittivity with concentration of electrolyte. This dispenses any remaining doubt on the existence of triple ions. Formation constants K sub P and K sub T...
Topics: DTIC Archive, Inoue,Naoki, POLYTECHNIC UNIV FARMINGDALE NY WEBER RESEARCH INST, *ELECTRICAL...
A method has been developed for nonintrusive collection of surface-temperature data from reactive and nonreactive surfaces. The method relies on the temperature sensitivity of the laser-induced fluorescence of a rare-earth ion which has been seeded into the material under study. The rare-earth ion (dysprosium) doped into a crystal (yttrium-aluminum-garnet) is shown to be an ideal seed, the fluorescence of which is stimulated by the ultra -violet output of a Nd:YAG laser. The fluorescence of the...
Topics: DTIC Archive, Goss,L P, SYSTEMS RESEARCH LABS INC DAYTON OH, *COMBUSTION, *SOLID PROPELLANTS, YAG...
Ion cyclotron turbulence has been observed with shocks and double layers in the magnetosphere where strongly localized electric fields perpendicular to the magnetic field are present. Theoretical analysis suggests that electrostatic waves with frequency of the order of the ion cyclotron frequency can be destabilized due to the coupling of regions of positive and negative energy ion waves. The nonlocal theory for a smooth profile of transverse inhomogeneous electric fields shows that localized...
Topics: DTIC Archive, Nishikawa, K -I, NAVAL RESEARCH LAB WASHINGTON DC, *PLASMAS(PHYSICS), *MAGNETOSPHERE,...
Hydroxylammonium nitrate (HAN) is the major component of the aqueous monopropellants used in the liquid propellant gun. It is produced by the electrolytic reduction of nitric acid, a process that results in a dilute HAN- water mixture containing excess nitric acid. This excess acid must be removed before the HAN is concentrated for use in propellant production. A strongly acidic, cation exchange resin, INIAC CUP-110, has been evaluated for this purpose and works quite well. The resin is used to...
Topics: DTIC Archive, Klein, Nathan, ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD, *AMMONIUM...
The object of this series of studies was to develop a theoretical account of the observed thermodynamic properties of simple and polyelectrolyte solutions based on molecular simulation, and to gain a structural perspective on the sources of nonideality in these mixtures, leading to the development of workable theoretical models to understand DNA-ligand interactions in aqueous solutions of simple electrolytes. In the concluding year of support, we have focused on the development of Computer...
Topics: DTIC Archive, Beveridge, David L, WESLEYAN UNIV MIDDLETOWN CT DEPT OF CHEMISTRY, *MATHEMATICAL...
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ix, 298 p. ; 23 cm
Topics: Ions -- Spectra, Mass spectrometry
Topics: Radio Program, Magnetism, Theory of relativity, Space, Physical cosmology, Universe, Concepts in...
Bell System Technical Journal, 4: 1. January 1925 pp 112-151. Some Contemporary Advances in Physics - VI Electricity in Gases. (Darrow, Karl K.)
Topics: electrons, cathode, electron, energy, atoms, field, anode, ions, dark, gas, crookes dark, positive...
Energetic precipitating particles (EPPs) can cause significant direct constituent changes in the mesosphere and stratosphere (middle atmosphere) during certain periods. Both protons and electrons can influence the polar middle atmosphere through ionization and dissociation processes. EPPs can enhance HOx (H, OH, HO2) through the formation of positive ions followed by complex ion chemistry and NOx (N, NO, NO2) through the dissociation of molecular nitrogen. The HOx increases result in direct...
Topics: NASA Technical Reports Server (NTRS), ELECTRON PRECIPITATION, ENERGETIC PARTICLES, MIDDLE...
Two of the many sounding rockets launched as part of the MAC/Epsilon campaign are particularly suited to test the validity or quality of D region models. The measurements covered atomic oxygen, neutral temperatures and fluxes of charged particles. With these parameters as inputs, one is thus in the position to assess their relevance for the measured parameters, i.e., ion composition, transition heights of clusters and negative ions and total plasma density. The two IOMAS payloads are believed...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC MODELS, ATMOSPHERIC TEMPERATURE, D REGION, OXYGEN...
A number of experimental lithium-ion cells, consisting of MCMB (meso-carbon microbeads) carbon anodes and LiNi(0.8)Co(0.2)O2 cathodes, have been fabricated with increased safety and expanded capability. These cells serve to verify and demonstrate the reversibility, low-temperature performance, and electrochemical aspects of each electrode as determined from a number of electrochemical characterization techniques. A number of Li-ion electrolytes possessing fluorinated ester co-solvents, namely...
Topics: NASA Technical Reports Server (NTRS), LITHIUM, ELECTROLYTES, ESTERS, SOLID ELECTROLYTES, METHYL...
Devices called solid-state ferroelectric- based sources (SSFBSs) are under development as sources of electrons, ions, ultraviolet light, and x-rays for diverse applications in characterization and processing of materials. Whereas heretofore it has been necessary to use a different device to generate each of the aforementioned species of charged particles or radiation, a single SSFBS can be configured and operated to selectively generate any of the species as needed using a single source....
Topics: NASA Technical Reports Server (NTRS), CHARGED PARTICLES, ELECTRONS, FERROELECTRICITY, SOLID STATE,...
solar flares accelerate both ions and electrons to high energies, and their x-ray and gamma-ray signatures not only probe the relationship between their respective acceleration, but also allow for the measurement of accelerated and ambient abundances. RHESSI observations have shown a striking close linear correlation of gamma-ray line fluence from accelerated ions > approx 20 MeV and bremsstrahlung emission from relativistic accelerated electrons >300 kev, when integrated over...
Topics: NASA Technical Reports Server (NTRS), GAMMA RAYS, IONS, SOLAR FLARES, SOLAR X-RAYS, PARTICLE...
No abstract available
Topics: NASA Technical Reports Server (NTRS), ELECTRIC BATTERIES, METAL IONS, ELECTROCHEMICAL CELLS,...
Orbits of individual charged particles were traced in a one-dimensional magnetic field model that included a uniform cross-tail component B(sub yo). The effects of B(sub yo) on the cross-tail current distribution j(sub y)(z), the average cross-tail drift velocity(nu(sub y)z), and the average pitch angle change(delta alpha) experienced during current sheet encounters were calculated. The addition of a B(sub yo) that exceeded several tenths of one nanotesla completely eliminated all resonance...
Topics: NASA Technical Reports Server (NTRS), ASTRONOMICAL MODELS, BIRKELAND CURRENTS, COMPUTATIONAL...
Increasing cell spacing decreased adjacent cell damage center dotElectrically connected adjacent cells drained more than physically adjacent cells center dotRadiant barrier prevents propagation when fully installed between BP cells center dotBP cells vent rapidly and expel contents at 100% SOC -Slower vent with flame/smoke at 50% -Thermal runaway event typically occurs at 160 degC center dotLG cells vent but do not expel contents -Thermal runaway event typically occurs at 200 degC center dotSKC...
Topics: NASA Technical Reports Server (NTRS), ELECTRIC BATTERIES, ENVIRONMENT EFFECTS, CONTAMINANTS,...
Topics: Radio Program, Lead, Toxicology, Contract law, Pollution, Smoke, Real estate, American Protestants,...
The synthesis and study of electrically conducting polymers, particularly polyheterocycles, is being carried out with the ultimate goal of producing materials with a variety of electronic and ionic transport properties while, at the same time, gaining an improvement in their processibility. Polymers based on monomer systems containing a high density of attached dipoles are being developed with the goal of producing materials with elevated permittivities while retaining low loss behavior....
Topics: DTIC Archive, Pomerantz, Martin, TEXAS UNIV AT ARLINGTON DEPT OF CHEMISTRY, *ELECTRON TRANSPORT,...
Line widths have been measured on spectra from implosions with the Gamble II generator. The K-shell transitions from sodium ions were observed with a curved crystal x-ray spectrograph and imaged with a pinhole camera. The various contributions to spectral line broadening were analyzed. The conclusion is that the line widths were comprised essentially of a source broadening due to the finite plasma size and a plasma broadening due to the ion motion during the implosion final stage. Despite the...
Topics: DTIC Archive, Mehlman, G, NAVAL RESEARCH LAB WASHINGTON DC, *IMPLOSIONS, *PLASMAS(PHYSICS),...
Topics: DTIC Archive, Smart, D F, PHILLIPS LAB HANSCOM AFB MA, *SOLAR FLARES, *SOLAR DISTURBANCES, GROUND...
Rate constants and product branching ratios for reactions involving atmospherically interesting ions and ClONO2 have been measured. H3O(+) reacts rapidly with ClONO2, but the hydrates of H3O(+) do not. This implies that ClONO2 does not play a central role in the positive ion chemistry of the atmosphere. CO3(-) reacts with ClONO2 to form NO3(-). Both NO3(-) and NO3(-)(H2O) react with ClONO2 to form NO3(-)(ClONO2). H2O does not react with NO3(-)(ClONO2), which is essential to the proposed in situ...
Topics: DTIC Archive, Viggiano, A A, PHILLIPS LAB HANSCOM AFB MA, *ATMOSPHERIC DISTURBANCES, *CHEMICAL...
The influence of the supporting electrolyte concentration on the steady-state voltamnetric behavior of a 12.5 micrometers-radius rotating Pt disk electrode (angular velocity, (omega=0 to 378 radian/s) has been investigated for several electrochemical reactions in acetonitrile solutions. The results demonstrate that the voltammetric response is a strong function of the ratio of the supporting electrolyte and redox concentrations (C(sub elec)/C(sub redox)) as well as the charge of the reactant,...
Topics: DTIC Archive, Gao, Xiaoping, UTAH UNIV SALT LAKE CITY DEPT OF CHEMISTRY, *IONS, *VOLTAMMETRY,...
A multilesion cell kinetic model is derived, and radiation kinetic coefficients are related to the Katz track structure model. The repair-related coefficients are determined from the delayed plating experiments of Yang et al. for the C3H10T1/2 cell system. The model agrees well with the x ray and heavy ion experiments of Yang et al. for the immediate plating, delaying plating, and fractionated exposure protocols employed by Yang. A study is made of the effects of target fragments in energetic...
Topics: NASA Technical Reports Server (NTRS), CELL DIVISION, CELLS (BIOLOGY), HEAVY IONS, LESIONS,...
Reactive ion beam sputter deposition of aluminum simultaneous with low energy arrival of oxygen ions at the deposition surface enables the formation of highly transparent aluminum oxide films. Thick (12 200 A), adherent, low stress, reactively deposited aluminum oxide films were found to provide some abrasion resistance to polycarbonate substrates. The reactively deposited aluminum oxide films are also slightly more hydrophobic and more transmitting in the UV than aluminum oxide deposited from...
Topics: NASA Technical Reports Server (NTRS), ABRASION RESISTANCE, ALUMINUM OXIDES, FLUOROPOLYMERS, OXIDE...
This project is concerned with a fundamental study of methods of recovering uranium from dilute aqueous solutions by means of organic precipitants or complexing agents. In many instances, solutions of this type are encountered as effluents from processing plants or as leach solutions from low-grade uranium-bearing ores, from which it is desired to obtain the uranium in concentrated form without using excessive amount of neutralizing agents. Many of these solutions contain large amounts of...
Topics: DTIC Archive, Kahler, E. J., BATTELLE MEMORIAL INST COLUMBUS OH, *ORGANIC MATERIALS, *URANIUM,...
The apical membrane of high electrical resistance epithelia, which is selectively permeable to Na(+), plays an essential role in the maintenance of salt balance. Na(+) entry from the apical fluid into the cells is mediated by amiloride-blockable Na(+)-specific channels. The channel protein purified from both amphibian and mammalian sources, is composed of several subunits, only one of which, the 150-kDa polypeptide, specifically binds the Na(+) transport inhibitor amiloride. The goal of the...
Topics: DTIC Archive, Sariban-Sohraby, Sarah, WALTER REED ARMY INST OF RESEARCH WASHINGTON DC, *IONS,...
As noted in the previous technical report, we are interested in using interfacial polymerization to synthesize ultrathin film composite membranes based on electronically conductive polymers. During the previous year of AASERT funding we have expanded on this idea in a number of ways. We have done such interfacial polymerizations to make new composites for membrane-based separations, and to make novel coated-hollow fiber membranes. Ultrathin film composite membranes, Electrochemistry...
Topics: DTIC Archive, Martin, Charles R, COLORADO STATE UNIV FORT COLLINS DEPT OF CHEMISTRY, *COMPOSITE...
This report presents two important results for a weakly collisional, current-free, two-temperature electron-ion plasma: (1) that e-i collisions have an undamping effect on ion acoustic waves, and (2) that, for appropriate values of the plasma parameters, ion-acoustic waves become marginally stable. The results are based on the closed form solution for the dielectric function for the linearized Balescu-Lenard-Poisson kinetic equations. The weakly collisional ordering is necessary to obtain an...
Topics: DTIC Archive, Basu, Bamandas, AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA, *PLASMAS(PHYSICS), *PARTICLE...
Recent attempts to raise the critical temperatures of cuprate superconductors are reviewed and discussed in terms of covalent electron transfer between Cu ions of mixed valence. A report of possible superconductivity effects at 250 K is examined from the standpoint of ABO2 parent-cell building blocks identified as superconducting by Goodenough and his students at the University of Texas. Based on the mounting evidence that cation mixed valence is responsible for the superconduction in these...
Topics: DTIC Archive, Dionne, G F, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *HIGH TEMPERATURE,...
During recent years, formation of negative ions as received considerable attention because of its intimate relationship to atmospheric physics and to some plasmas of low and moderate temperatures. Experimental results recently obtained in a laboratory st on the formation of negative ions of SeF6 by collisions with electr ns having energies in the range from 0.1 eV - 1.5 EV are discussed. This analysis deal with attachment through two-body collisions.
Topics: DTIC Archive, MASTRUP, F N, TRW SPACE TECHNOLOGY LABS LOS ANGELES CA, *SELENIUM COMPOUNDS,...
The possibility of enhancing the luminescence efficiency of Er ions embedded in a semiconductor was investigated by growing about forty erbium-doped lnGaAs/GaAs and GaAs/AlGaAs multiple quantum well samples by molecular beam epitaxy. The idea was to enhance the semiconductor-to- erbium transfer by tuning the quantum-well transition energy to equal one of the erbium ion transitions. Although photoluminescence was seen up to room temperature, strong diffusion of erbium and interdiffusion of Ga...
Topics: DTIC Archive, Gibbs, hyatt M., ARIZONA UNIV TUCSON, *IONS, *SEMICONDUCTORS, *ERBIUM,...
Yttria-stabilized zirconia (YSZ) is of interest to the aerospace community, notably for its application as a thermal barrier coating for turbine engine components. In such an application, diffusion of both oxygen ions and cations is of concern. Oxygen diffusion can lead to deterioration of a coated part, and often necessitates an environmental barrier coating. Cation diffusion in YSZ is much slower than oxygen diffusion. However, such diffusion is a mechanism by which creep takes place,...
Topics: NASA Technical Reports Server (NTRS), YTTRIA-STABILIZED ZIRCONIA, THERMAL CONTROL COATINGS, ENGINE...
The use of dished high perveance grids on a 15 cm modified SERT 2 thruster is shown to facilitate throttled operation over a beam current range from 60 to 600 mA. Effects of increasing the radial component of the magnetic field in the main discharge chamber and decreasing the dimensions of the cathode discharge region are examined and found to degrade performance to the extent that primary electrons are forced in toward the center-line of the thruster. Studies of the baffle aperture region of...
Topics: NASA Technical Reports Server (NTRS), CATHODES, SERT 2 SPACECRAFT, BEAMS (RADIATION), IONS,...
Full configuration-interaction calculations are reported, and compared to other methods, for H2O at its equilibrium geometry and at two geometries with the H-O bonds stretched. Since the percentage of the self-consistent field (SCF) reference in the full configuration-interaction (FCI) wave function decreases greatly with the bond elongation, the accuracy of techniques based on a single reference do not compare well with the FCI results. However, the results from a complete active space...
Topics: NASA Technical Reports Server (NTRS), COMPUTATIONAL CHEMISTRY, CONFIGURATION INTERACTION, ELECTRON...
Electrophoresis has been used for the separation of particles, ions, and molecules for a number of years. The technology for separation and detection of the results has many applications in the life sciences. One of the major goals of the scientific community is to separate DNA molecules and intact chromosomes based upon their different lengths or number of base pairs. This may be achieved by using some of the commercially available and widely used methods, but these processes require a...
Topics: NASA Technical Reports Server (NTRS), BIOTECHNOLOGY, CHROMOSOMES, DEOXYRIBONUCLEIC ACID,...
The work under this grant involves studies of the interaction of interstellar pickup ions with the solar wind, with the goal of a comprehensive model of the particle distributions and wave intensities to be expected throughout the heliosphere, as well as the interactions of those distributions with the solar wind termination shock. In the past year, we have completed a number of projects, including observations and modeling of the effects of a large scattering mean free path on the pickup He(+)...
Topics: NASA Technical Reports Server (NTRS), INTERSTELLAR GAS, IONS, SOLAR WIND, ATMOSPHERIC PHYSICS,...
Highly detailed Raman spectra from a single KS-44 graphite microflake electrode as a function of the applied potential have been collected in situ using a Raman microscope and a sealed spectroelectrochemical cell isolated from the laboratory environment. Correlations were found between the Raman spectral features and the various Li(+) intercalation stages while recording in real time Raman spectra during a linear potential scan from 0.7 down ca. 0.0V vs Li/Li(+) at a rate of 0.1 mV/s in a 1M...
Topics: NASA Technical Reports Server (NTRS), ELECTRODES, ELECTROLYTES, GRAPHITE, RAMAN SPECTRA, LITHIUM,...
Inasmuch as marine biology is a science that deals with the development of animal and plant life in the ocean, its scope is not confined to biology alone. It is, for all practical purposes, an integral part of oceanic study. This science has been well developed by advanced countries bordering seacoasts. Like other branches of science, it was neglected by the reactionary rule before the liberation.
Topics: DTIC Archive, Ch'eng-K'wei, Tseng, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *MARINE...
Since more than 20 years ago, when the National Academy of Sciences and the National Research Council of the U.S.A. released their report on 'HZE particle effects in manned spaced flight', it has been emphasized how difficult - if not even impossible - it is to assess their radiobiological impact on man from conventional studies where biological test organisms are stochastically exposed to 'large' fluences of heavy ions. An alternative, competing approach had been realized in the BIOSTACK...
Topics: NASA Technical Reports Server (NTRS), BIOLOGICAL EFFECTS, CHROMOSOMES, COSMIC RAYS, DIMENSIONAL...
Low temperature dielectronic recombination (DR) is the dominant recombination mechanism for most ions in X-ray photoionized cosmic plasmas. Reliably modeling and interpreting spectra from these plasmas requires accurate low temperature DR rate Coefficients. Of particular importance are the DR rate coefficients for the iron L-shell ions (Fe XVII-Fe XXIV). These ions are predicted to play an important role in determining the thermal structure and line emission of X-ray photoionized plasmas, which...
Topics: NASA Technical Reports Server (NTRS), COSMIC PLASMA, ELECTRON-ION RECOMBINATION, LOW TEMPERATURE,...
A survey of the plasma wave data from the Hawkeye-1 spacecraft has been performed in search of ion cyclotron waves associated with the scattering and loss of ring current ions within and near the plasma-pause. During an 18 month period, consisting of about 270 orbits, a total of 5 events have been found with clearly detectable electric and magnetic fields at frequencies below the proton gyrofrequency. Comparisons of the electric and magnetic field amplitudes for these events provide strong...
Topics: DTIC Archive, Kintner,Paul M, Gurnett,Donald A, IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY,...
The Boltzmann equation for the single particle distribution function for a heavy ion beam penetrating matter is solved. Assume rotational and translational invariance, plane symmetry and time independence. A Hermite and Legendre polynomial expansion of the distribution function is made in the configuration and angular coordinates, respectively. A code for numerically solving the integral equations for the energy dependent expansion coefficients has been written and solved explicityly for the...
Topics: DTIC Archive, Mueller,G P, NAVAL RESEARCH LAB WASHINGTON D C, *TRANSPORT PROPERTIES, *HEAVY IONS,...
During the three years of this grant, a negative ion time-of-flight photoelectron spectrometer was constructed and used in a series of novel experiments designed to probe the transition state region in chemical reactions. In addition, conventional photoelectron spectra of several anions with high electron binding energies were obtained. Cold negative ions are produced in an ion source based on a pulsed free jet expansion. The ions are mass selected using a time of flight mass spectrometer. Ions...
Topics: DTIC Archive, Neumark, Daniel M, CALIFORNIA UNIV BERKELEY SPONSORED PROJECTS OFFICE, *IONS,...
Tissue equivalent proportional counters (TEPC) have been used to measure energy deposition in simulated volumes of tissue ranging in diameter from 0.1 to 10 microns. There has been some concern that the wall used to define the volume of interest could influence energy deposition within the sensitive volume. These 'wall effects' occur because the wall has a density significantly greater than the cavity gas. Energy deposition measurements were made for 1 GeV/nucleon Fe ions in a TEPC simulating...
Topics: DTIC Archive, Rademacher, Steven E., COLORADO STATE UNIV FORT COLLINS DEPT OF RADIOLOGICAL HEALTH...
Specular reflectance changes have been used to examine specific adsorption of bromide on gold in the presence of a large excess of supporting electrolyte (NaF) which is not specifically adsorbed. A linear relation has been demonstrated between the relectance changes and the surface excess of bromide through the examination of the time dependence of the reflectance under conditions where the rate of adsorption of the bromide is diffusion controlled and hence known. The adsorption isotherms have...
Topics: DTIC Archive, Adzic,Radoslav, CASE WESTERN RESERVE UNIV CLEVELAND OHIO ELECTROCHEMISTRY RESEARCH...
