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449. Oxygen diffusion in periclase crystals
402
Abstracts 430---450
Materials and Techniques used in Vacuum Technology 40.
Gases and Vapours
40 430. Pressure Dependence of Some Infrared and Vacuum Ultraviolet Bands Occurring in Active Nitrogen. Robert A. Young, J. Chem. Phys., 33, 1112-1230, Oct. 1960. 40 431. Charge Transfer between Atomic Hydrogen and N ÷ and O ÷. R. F. Stebbings, Wade L. Fire and David G. Hummer, J. Chem. Phys., 33, 1226-1116, Oct. 1960. 432. Interchange of Charge between Gaseous Molecules. Donald Rapp and Irene B. Ortenburger, J. Chem. Phys., 33, 1230--1233, Oct. 1960. 40 433. Rapid Determination of Gaseous Diffusion Coefficients by Means of Gas Chromatography Apparatus. Note by J. Calvin Giddings and Spencer L. Seager, J. Chem. Phys., 33, 1579-1580, Nov. 1960. 40 434. Dielectric Constants of Imperfect Gases. I. Helium, Argon, Nitrogen, and Methane. D. R. Johnston, G. J. Oudemans and R. H. Cole, J. Chem. Phys., 33, 1310-1317, Nov. 1960. 40 435. Molecular Friction in Dilute Gases. J. T. O'Toole and J. S. Dahler, J. Chem. Phys., 33, 1496-1504, Nov. 1960. 40 436. Dissociation Energies of Diatomie Molecules. G. R. Somayajulu, J. Chem. ~hys., 33, 1541-1553, Nov. 1960. 4O 437. Sparking Potential and Molecular Structure of Unsaturated Hydrocarbon Gases. R. W. Crowe and J. C. Devins, J. Chem. Phys., 33, 413-418, Aug. 1960. 40 438. Self-Diffusion of Oxygen in Single Crystal and Polyerystalline Aluminum Oxide. Y. Oishi and W. D. Kingery, J. Chem. Phys., 33, 480--486, Aug. 1960. 40 439. Interaction of Condensable Gases with Cold Surfaces. Deposition from a molecular beam onto a cold target surface only occurs when the beam pressure is many orders of magnitude larger than the vapor pressure of the depositing phase at the substrate temperature. The critical beam pressure for deposition has been interpreted as a critical supersaturation for heterogeneous nucleation of a condensed phase. It is shown that the critical beam pressure is much too large to be accounted for as a critical value for nucleation if the adsorbate temperature and the snbstrate temperature are alike. The interpretation of critical deposition phenomena as a nucleation event must include the additional assumption that the adsorbate temperature is somewhat higher than the substrate temperature. (Author) G. W. Sears and J. W. Cahn, J. Chem. Phys., 33, 494-499, Aug. 1960. 40 440. Heterogeneous Reactions Studied by Mass Spectrometry. I. Reaction of B~Og(s) with H20(g). David J. Meschi, William A. Chupka and Joseph Berkowitz, J. Chem. Phys., 33, 530-533, Aug. 1960.
40 441. Heterogeneous Reactions Studied by Mass Spectrometry. II. Reaction of Li20(s) with H~O(g). Joseph Berkowitz, David J. Meschi and William A. Chupka, J. Chem. Phys., 33, 533-540, Aug. 1960. 4O 442. Viscosity of Mixtures of Hydrogen and Water Vapor at 295°K. Note by J. W. Fox and A. C. H. Smith, J. Chem. Phys., 33, 623-624, Aug. 1960. 40 443. Multiple Ionization in Argon and Krypton by Electron Impact. R. E. Fox, J. Chem. Phys., 33, 200-205, July 1960. 40 444. Recombination Kinetics of Atomic Oxygen at Room Temperature. Note by C. B. Kretschmer and H. L. Petersen, J. Che'm. Phys., 33, 948-949, Sept. 1960. 40 445. Secondary Reactions in a Gas Discharge. Arene B. Ortenburger, Martin Hertzberg and Richard A. Ogg, Jr., J. Chem. Phys., 33, 579-583, Aug. 1960. 40 446. Kinetic Absorption Spectra Recorded Through Flash-Heated Grids. Note by L. S. Nelson and N. A. Kuebler, J. Chem. Phys., 33, 610--611, Aug. 1960. 4O 447. Separation of Gas Mixtures in a Supersonic Jet. H. Behavior of Helium-Argon Mixtures and Evidence of Schock Separation. S. Alexander Stern, P. C. Waterman and T. F. Sinclair, J. Chem. Phys., 33, 805-813, Sept. 1960. 4O 448. Threshold Law for the Probability of Excitation of Molecules by Photon Impact. A Study of the Photoionization Efficieaeles of Br2, I2, HI and CH3I. J. D. Morrison, H. Hurzeler and Mark G. lnghram, J. Chem. Phys., 33, 821-824, Sept. 1960. 40 449. Oxygen Diffusion in Per'iclase Crystals. Y. Oishi and W. D. Kingery, J. Chem. Phys., 33, 905-906, Sept. 1960.
41.
M e t a l s and Alloys
41 450. Space-Age Beryllium--It's Technology. The advantages of beryllium as a metal for use in space vehicles and the various fabrication methods currently in use are discussed. The problems encountered in using materials at very low pressures are also considered.A.G. Robert H. Gassner, Metal Prog., 78, 88-92, Sept. 1960.
Abstracts 430---450
Materials and Techniques used in Vacuum Technology 40.
Gases and Vapours
40 430. Pressure Dependence of Some Infrared and Vacuum Ultraviolet Bands Occurring in Active Nitrogen. Robert A. Young, J. Chem. Phys., 33, 1112-1230, Oct. 1960. 40 431. Charge Transfer between Atomic Hydrogen and N ÷ and O ÷. R. F. Stebbings, Wade L. Fire and David G. Hummer, J. Chem. Phys., 33, 1226-1116, Oct. 1960. 432. Interchange of Charge between Gaseous Molecules. Donald Rapp and Irene B. Ortenburger, J. Chem. Phys., 33, 1230--1233, Oct. 1960. 40 433. Rapid Determination of Gaseous Diffusion Coefficients by Means of Gas Chromatography Apparatus. Note by J. Calvin Giddings and Spencer L. Seager, J. Chem. Phys., 33, 1579-1580, Nov. 1960. 40 434. Dielectric Constants of Imperfect Gases. I. Helium, Argon, Nitrogen, and Methane. D. R. Johnston, G. J. Oudemans and R. H. Cole, J. Chem. Phys., 33, 1310-1317, Nov. 1960. 40 435. Molecular Friction in Dilute Gases. J. T. O'Toole and J. S. Dahler, J. Chem. Phys., 33, 1496-1504, Nov. 1960. 40 436. Dissociation Energies of Diatomie Molecules. G. R. Somayajulu, J. Chem. ~hys., 33, 1541-1553, Nov. 1960. 4O 437. Sparking Potential and Molecular Structure of Unsaturated Hydrocarbon Gases. R. W. Crowe and J. C. Devins, J. Chem. Phys., 33, 413-418, Aug. 1960. 40 438. Self-Diffusion of Oxygen in Single Crystal and Polyerystalline Aluminum Oxide. Y. Oishi and W. D. Kingery, J. Chem. Phys., 33, 480--486, Aug. 1960. 40 439. Interaction of Condensable Gases with Cold Surfaces. Deposition from a molecular beam onto a cold target surface only occurs when the beam pressure is many orders of magnitude larger than the vapor pressure of the depositing phase at the substrate temperature. The critical beam pressure for deposition has been interpreted as a critical supersaturation for heterogeneous nucleation of a condensed phase. It is shown that the critical beam pressure is much too large to be accounted for as a critical value for nucleation if the adsorbate temperature and the snbstrate temperature are alike. The interpretation of critical deposition phenomena as a nucleation event must include the additional assumption that the adsorbate temperature is somewhat higher than the substrate temperature. (Author) G. W. Sears and J. W. Cahn, J. Chem. Phys., 33, 494-499, Aug. 1960. 40 440. Heterogeneous Reactions Studied by Mass Spectrometry. I. Reaction of B~Og(s) with H20(g). David J. Meschi, William A. Chupka and Joseph Berkowitz, J. Chem. Phys., 33, 530-533, Aug. 1960.
40 441. Heterogeneous Reactions Studied by Mass Spectrometry. II. Reaction of Li20(s) with H~O(g). Joseph Berkowitz, David J. Meschi and William A. Chupka, J. Chem. Phys., 33, 533-540, Aug. 1960. 4O 442. Viscosity of Mixtures of Hydrogen and Water Vapor at 295°K. Note by J. W. Fox and A. C. H. Smith, J. Chem. Phys., 33, 623-624, Aug. 1960. 40 443. Multiple Ionization in Argon and Krypton by Electron Impact. R. E. Fox, J. Chem. Phys., 33, 200-205, July 1960. 40 444. Recombination Kinetics of Atomic Oxygen at Room Temperature. Note by C. B. Kretschmer and H. L. Petersen, J. Che'm. Phys., 33, 948-949, Sept. 1960. 40 445. Secondary Reactions in a Gas Discharge. Arene B. Ortenburger, Martin Hertzberg and Richard A. Ogg, Jr., J. Chem. Phys., 33, 579-583, Aug. 1960. 40 446. Kinetic Absorption Spectra Recorded Through Flash-Heated Grids. Note by L. S. Nelson and N. A. Kuebler, J. Chem. Phys., 33, 610--611, Aug. 1960. 4O 447. Separation of Gas Mixtures in a Supersonic Jet. H. Behavior of Helium-Argon Mixtures and Evidence of Schock Separation. S. Alexander Stern, P. C. Waterman and T. F. Sinclair, J. Chem. Phys., 33, 805-813, Sept. 1960. 4O 448. Threshold Law for the Probability of Excitation of Molecules by Photon Impact. A Study of the Photoionization Efficieaeles of Br2, I2, HI and CH3I. J. D. Morrison, H. Hurzeler and Mark G. lnghram, J. Chem. Phys., 33, 821-824, Sept. 1960. 40 449. Oxygen Diffusion in Per'iclase Crystals. Y. Oishi and W. D. Kingery, J. Chem. Phys., 33, 905-906, Sept. 1960.
41.
M e t a l s and Alloys
41 450. Space-Age Beryllium--It's Technology. The advantages of beryllium as a metal for use in space vehicles and the various fabrication methods currently in use are discussed. The problems encountered in using materials at very low pressures are also considered.A.G. Robert H. Gassner, Metal Prog., 78, 88-92, Sept. 1960.