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  • Articles  (15)
  • Cold fusion  (14)
  • Chemistry
  • United States
  • 2005-2009
  • 2000-2004
  • 1990-1994  (15)
  • Energy, Environment Protection, Nuclear Power Engineering  (15)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of fusion energy 9 (1990), S. 263-268 
    ISSN: 1572-9591
    Keywords: Cold fusion ; palladium ; deuterium ; ion implantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Deuterium was introduced into palladium at atomic ratios greater than one by means of ion implantation at cryogenic temperatures, and a search was made for energetic charged particles from D-D nuclear reactions. Concentrations as high as 1.6 D/Pd were produced by 10 keV implantation at temperatures of 41 and 81 K, and the occurrence of lattice supersaturation in the Pd deuteride was indicated by a new, low-temperature stage of D redistribution. Fifteen hours of observation at low temperatures yielded no indication of energetic charged particles due to the reaction D(d,p)T or other nuclear processes. This result implies an approximate upper bound of 10−21 events/s per D atom on the reaction rate in the supersaturated deuteride. Negative results were also obtained for D-implanted zirconium and titanium.
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  • 2
    ISSN: 1572-9591
    Keywords: Cold fusion ; Pd-D2O cells ; Ti-D2 systems ; barrier penetration calculations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We have searched for cold fusion produced in an electrolytic cell with Pd cathode and Pt anode. The electrolyte was 0.1 molar LiOD in 99.8% D2O. A 2-mm rod of polycrystalline Pd and a 4-mm rod of single crystal Pd were used. No radiation was detected above background by a BF3 neutron and Ge γ-X detector. The D2 loading of the Pd was 0.8 D per Pd atom reaching saturation after 4 hours. We also attempted to duplicate the work of Scaramuzzi and co-workers on the Ti-D2 system. Both powder and pieces of Ti were used. The material was cycled several times between 1100 K and 77 K. No neutron, γ- or x-ray emission above background was observed. The results of a barrier penetration calculation for H-like atoms are presented. The high fusion rates reported for PdD x . are much larger than those expected from theoretical calculations on these systems.
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  • 3
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    Springer
    Journal of fusion energy 9 (1990), S. 333-336 
    ISSN: 1572-9591
    Keywords: Cold fusion ; electrochemical calorimetry ; palladium ; deuterium oxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Electrochemical calorimetric studies were carried out in H2O and D2O using Pd and Pt cathodes with LiOD(H) electrolytes. Two types of calorimetric cell designs were used in this attempt to detect excess enthalpy during the electrolysis of D2O using Pd cathodes. Control experiments were run side by side using water and/or Pt cathodes. A variety of pretreatments and cathode attachment schemes were employed. No discernible differences were detected between the Pd/D2O cells and the controls, regardless of conditions. For example, using one type of calorimetric cell and conditions, the mean value for the excess enthalpy was 6.5±4% in D2O compared to 7.5±7% in H2O. For the other type cell, the mean result for one series of experiments was 0±4% compared to Pt cathodes.
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  • 4
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    Journal of fusion energy 9 (1990), S. 337-343 
    ISSN: 1572-9591
    Keywords: Cold fusion ; energy balance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A series of experiments was performed at the Idaho National Engineering Laboratory (INEL) to investigate mechanisms that may contribute to energy flows in electrolysis cells like those of Fleischmann and Pons. Ordinary water (H2O), heavy water (D2O), and a mixture of the two were used in the INEL experiments. Cathodes used include a 51-μm Pd foil and 1-mm diameter extruded wire Pd rods in straight and coiled configurations. Energy balances in these experiments revealed no significant net gain or net loss of energy. Cell overpotential curves were fit well with a Tafel equation, with parameters dependent on electrode configuration, electrolyte composition, and temperature. Water evaporation and interactions of hydrogen isotopes with the Pd cathode were evaluated and found not to be significant to energy balances. No ionizing radiation, tritium production, or other evidence of fusion reactions was observed in the INEL experiments.
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  • 5
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    Journal of fusion energy 9 (1990), S. 345-349 
    ISSN: 1572-9591
    Keywords: Cold fusion ; heat mechanism ; deuterium-palladium ; hydrogen embrittlement ; fracture energy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The assumption that deuterium, and not palladium, is the fuel in the Pons-Fleischmann experiments led to high expectations of cold nuclear fusion. The conversion of mechanical energy to heat was neglected in studying the phenomenon. Considerable strain energy is stored in metals when processed from the ore. The initiation, growth, and propagation of cracks in the bulk disturb the energy balance within the metal. Deuterium induces and propagates cracks in metals and alloys, including palladium. The sudden discharge of fracture energy during crack propagation generates considerable heat. The abundance of deuterium in cracked palladium will not continue the heat-generation process. The confident figures-of-merit of cold fusion have been based on the small energy input to the electrolytic cells and do not consider the substantial energy required to process (by melting) the palladium from the ore, or to recycle the cracked electrode samples. In this paper, the work-of-fracture is shown to be the likely mechanism responsible for the excess heat in cold fusion.
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  • 6
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    Journal of fusion energy 9 (1990), S. 359-362 
    ISSN: 1572-9591
    Keywords: Cold fusion ; deuteron cluster ; boson condensation ; palladium electrodes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract According to our hypothetical model, the essential element for the occurrence of cold nuclear fusion within palladium is the formation of deuteron clusters within the palladium electrodes. There are several factors which can affect the size, density, and rate of cluster formation. These factors are (1) the presence of diffusion barriers at all upstream palladium surfaces that are not immersed in the electrolyte, and which also are not exposed to a sufficiently large electric field to prevent deuteron diffusion from the electrode, (2) the direction and magnitude of the electric field relative to the crystalline lattice, (3) local crystalline temperature excursions that are associated with the fusion events, and (4) the various deuterium diffusion mechanisms within the crystal which are associated with thermal gradients, deuterium concentration gradients, and externally-generated potential field gradients that can enhance interstitial quantum mechanical tunneling along the direction of the associated internal electric field.
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  • 7
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    Journal of fusion energy 9 (1990), S. 391-396 
    ISSN: 1572-9591
    Keywords: Cold fusion ; hydrogen embrittlement ; palladium-hydrogen ; palladium-deuterium ; fracture energy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Considerable heat was liberated from a palladium-deuterium (Pd-D) system and this was attributed to cold nuclear fusion of deuterium within the palladium lattice.1 The primary source of heat in cold fusion was proposed to be the work-of-fracture of cracks in the Pd electrodes, and the mechanism for crack initiation and propagation was identified as deuterium or hydrogen embrittlement.2 In this paper, comparable characteristics of cold fusion and embrittlement are established, relevant aspects of the extensive engineering database on hydrogen and deuterium embrittlement are reviewed, some areas of study and applications of the cold fusion process are identified, and parameters for controlling the ignition and heat release from metals are specified.
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  • 8
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    Journal of fusion energy 9 (1990), S. 441-445 
    ISSN: 1572-9591
    Keywords: Cold fusion ; dynamical screening ; mobile deuteron ; fusion rate ; accelerated deuteron ; PdDx deuteride
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Coulomb potential between deuterons in the PdDx deutende is dynamically screened by the mobile deuterons as well as the electrons. The screening effect by the mobile deuteron at low temperatures is substantial. When the all deuterons become mobile, the fusion rate observed by Jones et al. can be achieved using the classical formula for the ion polarization function, however, the rate using the quantum mechanical formula becomes 10−6–10−7 times smaller than the classical one. By the small increase in deuteron energy, of the order of a few electron volts, the fusion rate in PdDx deuteride increases substantially. But after about 10 eV of deuteron energy, the fusion rate does not increase at such a high rate as it does in the low-energy region. The fusion rate observed by Jones et al. might be explained by the acceleration of the deuteron by the electric field created in the domain boundary between the region containing the deuteron and the region without the deuteron or by the avalanche-type propagation of the fracture.
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  • 9
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    Environmental and resource economics 1 (1991), S. 385-413 
    ISSN: 1573-1502
    Keywords: Environmental standards ; environmental regulations ; benefit-cost ; cost-benefit ; United States ; efficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
    Notes: Abstract This paper summarizes the results of the first systematic, geographically-specific efficiency assessment of the U.S. experience with national environmental standards and with alternative approaches to establishing those standards. This ex-post evaluation assessed the net benefits that resulted from EPA's regulation of conventional air and water pollutants from the pulp and paper industry between 1973 and 1984. The paper compares the benefit-cost efficiencies of the three dominant regulatory approaches: technology, ambient, and benefits. Unlike previous studies, which assessed benefits and costs on a national basis, the study estimates both costs and benefits on a facility-by-facility basis. The analysis shows how the efficiency of national environmental regulations can vary dramatically at local levels. The authors conclude that the technology-based standards for water pollution management failed as an efficient environmental strategy. The costs clearly exceeded the benefits in the aggregate, as well as in the specific in most situations. Benefits exceeded costs at only 11 of the 68 mills investigated. The ambient based standards for air pollution management succeeded as an environmental strategy in the aggregate, but succeeded in the specific for only one-third of the mills (22 of 60 mills). The benefits-based standards for air pollution management also succeeded in the aggregate as well as in the specific for about one-half of the mills. Benefits exceeded costs at 29 of the 60 mills investigated. The results of the study point to two major conclusions. First, a regulatory policy that is based on some measure of environmental results, either ambient-based or benefits-based, will be more efficient than a policy that ignores environmental results. Second, truly efficient policies for reducing environmental risks require pollution mitigation decisions that take into account local conditions. These include not only the changes in local ambient conditions, but also the number of people who will benefit from pollution reduction decisions. This latter conclusion suggests that national environmental standards per se may be inefficient.
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  • 10
    ISSN: 1572-9591
    Keywords: Cold fusion ; Pd-D system ; Pd electrochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In a galvanostatic experiment of charging deuterium in a palladium cathode, nuclear and thermal effects were found. A sintered palladium electrode shaped as parallelepiped was used. After 6 days of electolysis at 200 mA/cm2, a simultaneous emission of neutrons, tritium excess in the electrolytic solution, and temperature rapid increase was observed. During the event which lasted 4 minutes, we counted 7.2×105 neutrons while the electrode temperature reached 150°C. Electrochemical procedure for charging the palladium electrode by deuterium using galvanostatic pulses as well as the associated electrode temperature trends are shown.
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  • 11
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    Journal of fusion energy 9 (1990), S. 383-389 
    ISSN: 1572-9591
    Keywords: Cold fusion ; ab initio computation ; palladium/hydrogen system ; palladium/deuterium system ; palladium tetrahedral site
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We report ab initio cluster computations of deuterium atoms in a tetrahedral palladium site, performed at the UHF level with extended basis sets. An interstitial deuteron is found to be energetically favored over an interstitial deuterium atom. Computations with one interstitial deuterium atom or with one deuteron reveal an increase in electron density near the deuteron. Not only valence electrons but also inner core electrons of the palladium atoms are present in the vicinity of the deuteron. A potential energy curve is calculated with two deuterium atoms approaching each other, with one deuterium fixed at the center of a tetrahedral site. With regard to the environment provided by molecular deuterium, our results show that the tetrahedral site does not favor a closer deuteron encounter. No metastable dimer geometry is found. The two deuterons repel each other despite the screening. These computations represent more than 250 CPU h of a new-generation biprocessor vector computer.
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  • 12
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    Journal of fusion energy 9 (1990), S. 479-481 
    ISSN: 1572-9591
    Keywords: Cold fusion ; neutron sources ; neutron spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Deterministic methods are used to calculate the neutron and photon sources and spectra that would develop if fusion reactions were occurring in cold fusion experimental devices. The results from the calculations give the neutron and gamma spectra resulting from a 2.45-MeV and a 14.1 MeV neutron source. The neutron source strength from certain (gamma,n) and (alpha,n) reactions are also determined.
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  • 13
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    Journal of fusion energy 9 (1990), S. 487-490 
    ISSN: 1572-9591
    Keywords: Cold fusion ; neutron production ; electrolysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We have repeated the so-called cold fusion experiment by electrolyzing heavy water, with 0.1M LiOD, with palladium rod as the cathode and platinum wire as the anode. The purpose of our experiment is to dectect the neutrons that are produced from the fusion process of deuterium if fusion does occur. We use one3He detector and one BF3 detector to detect the thermal neutrons coming out of the water bath that surrounds the heavy water cell. Possible neutron bursts are detected by the3He detector during a period of about 7 h after electrolyzing for 11 days.
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  • 14
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    Journal of fusion energy 9 (1990), S. 377-382 
    ISSN: 1572-9591
    Keywords: Cold fusion ; heat generated ; chemical interpretation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract It is concluded from a thermochemical analysis that the steady-state “excess heating” observed in calorimetric experiments1 is attributable to the heat of formation of liquid D2O resulting from recombination of D2 and O2 gases generated in the electrolytic cell. The recombination is catalyzed by both electrodes and the extent of the reaction increases on stirring, especially when D2 gas sparging is used for this purpose. Thermal effects of stored chemical energy, which include thermal power output exceeding electrical input in the short term and cathode meltdown from total sudden release, arise from storage of D atoms in supersaturated solid solution within the cathode volume. Their recombination to form D2 builds up high internal pressures, causing multiple fracture. Excess heat is liberated as D atoms and D2 molecules fall into deep traps created on fresh Pd surfaces, supplemented by D recombination heat. Postulation of unknown nuclear processes to account for the heat is not necessary.
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  • 15
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    Journal of fusion energy 9 (1990), S. 475-477 
    ISSN: 1572-9591
    Keywords: Cold fusion ; Feischmann and Pons ; Jones ; neutrons ; upper limits
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Following the announcement of cold nuclear fusion being observed in electrochemical cells by Fleischmann and Pons1 and by Jones,2 we have searched for the characteristic radiations of thed+d andp+d fusion reactions in cells similar to those described in Refs. 1 and 2. No fusion product neutrons or gamma rays have been observed from either palladium or titanium cathodes. From measured D/Pd ratios in the systems with the palladium cathodes, we set upper limits on the fusion rates for our systems.
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