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Full-Text Articles in Physics
Evidence For Weak Link And Anisotropy Limitations On The Transport Critical Current In Bulk Polycrystalline Y1Ba2Cu3O Χ , J.W. Ekin, A.I. Braginski, A.J. Panson, M.A. Janocko, D.W. Capone Ii, N.J. Zaluzec, B. Flandermeyer, O.F. De Lima, M. Hong, J. Kwo, Sy_Hwang Liou
Evidence For Weak Link And Anisotropy Limitations On The Transport Critical Current In Bulk Polycrystalline Y1Ba2Cu3O Χ , J.W. Ekin, A.I. Braginski, A.J. Panson, M.A. Janocko, D.W. Capone Ii, N.J. Zaluzec, B. Flandermeyer, O.F. De Lima, M. Hong, J. Kwo, Sy_Hwang Liou
Sy-Hwang Liou Publications
Measurements of the transport critical-current density (Jc), magnetization Jc, and magnetoresistance in a number of bulk sintered samples of Y1Ba2Cu3O χ from several different laboratories indicate that the transport Jc is limited by weak-link regions between high Jc regions. The weak-link Jc has a Josephson character, decreasing by two orders of magnitude as the magnetic field is increased from 0.1 to 10 mT at 77 K. An examination of the grain-boundary region in Y1Ba2Cu3O χ shows no observable impurities or …
Magnetically Induced Circular Polarization, K.L. Stricklett, D.J. Burns, Paul Burrow
Magnetically Induced Circular Polarization, K.L. Stricklett, D.J. Burns, Paul Burrow
Paul Burrow Publications
Helium atoms excited to an aligned (1s3d) 3D state are produced by electron impact parallel to a magnetic field. The initial alignment of the atomic state evolves into an orientation with finite angular momentum along the magnetic field direction and thus gives rise to a circularly polarized component in the (1s3d) 3D→(1s2p) 3P radiation propagating parallel to the magnetic field. Circular-polarization fractions of a few percent are observed, in general agreement with theory. The measured polarization fraction is found to be pressure dependent, indicating that secondary excitation and cascade processes must be included for a complete description.
Electrooptic And Piezoelectric Measurements In Photorefractive Barium Titanate And Strontium Barium Niobate, Stephen Ducharme, Jack Feinberg, R.R. Neurgaonkar
Electrooptic And Piezoelectric Measurements In Photorefractive Barium Titanate And Strontium Barium Niobate, Stephen Ducharme, Jack Feinberg, R.R. Neurgaonkar
Stephen Ducharme Publications
We have measured the low-frequency ("unclamped") electrooptic and piezoelectric coefficients in undoped BaTiO3and SrxBa1-xNb2O6 (x = 0.61) crystals using interferometric techniques. The contribution of the piezoelectric effect to the Pockels measurements is discussed. For an applied ac electric field in the range 0.1-200 V/cm, the electrooptic and piezoelectric effects are linear in the magnitude of the applied field and independent of its frequency in the range 10 Hz-100 kHz. The unclamped electrooptic coefficients of poled BaTiO3 single crystals are r13= 19.5 pm ±1 pm/V and r33 = …
Numerical Methods For Free-Free Radiative Transition Matrix Elements, Bo Gao, Anthony F. Starace
Numerical Methods For Free-Free Radiative Transition Matrix Elements, Bo Gao, Anthony F. Starace
Anthony F. Starace Publications
Increasing interest in multiphoton absorption processes above the ionization threshold has led theorists to reexamine numerical techniques for calculating radiative transition matrix elements between states of a continuum electron moving at large radial distances in the field of an atom or an ion. Here it is shown that accurate free-free radial matrix elements may be obtained using the usual dipole length formula by means of a rotation at finite distance in the complex coordinate plane together with solution of the free-electron wave function's phase and amplitude at finite distance in the complex coordinate plane. The procedure is designed for use …
Angular-Differential Studies Of Excitation In Quasi-Oneelectron Collisions At "High" Energy, E. Redd, Timothy J. Gay, D. M. Blakenship, J. T. Park, J. L. Peacher, D. G. Seely
Angular-Differential Studies Of Excitation In Quasi-Oneelectron Collisions At "High" Energy, E. Redd, Timothy J. Gay, D. M. Blakenship, J. T. Park, J. L. Peacher, D. G. Seely
Timothy J. Gay Publications
Qualitative differences have been observed between two types of "quasi-one-electron" collision systems. We have studied valence-electron excitation at "high" energy (relative collision velocities up to 0.5 a.u.) in the Mg++He and Na++H collision systems, and find that while Mg++He collisions are dominated by "direct" excitation, the Na++H collisions exhibit significant "molecular" excitation, even at the highest velocities. This behavior can be understood in terms of the molecular structure of the respective collision complexes, and the energy separation between the ground and first excited states of the valence electron.
Raman Detection Of The Superconducting Gap In Ba-Y-Cu-O Superconductors, K.B. Lyons, Sy_Hwang Liou, M. Hong, H.S. Chen, J. Kwo, T.J. Negran
Raman Detection Of The Superconducting Gap In Ba-Y-Cu-O Superconductors, K.B. Lyons, Sy_Hwang Liou, M. Hong, H.S. Chen, J. Kwo, T.J. Negran
Sy-Hwang Liou Publications
We have utilized an iodine absorption cell to enable detailed Raman studies at low frequency (down to 15 cm-1) in a thin film of the high-temperature superconductor Ba2YCu3O7. Subtraction of spectra just above and well into the superconducting phase reveals a weak broad feature (maximum near 400 cm-1, half width at half maximum approximately 250 cm-1), which we tentatively interpret as due to scattering near the superconducting gap. The large width of the feature may be partially related to smearing of the transition, or to gap anisotropy. Its …
Structural And Superconducting Properties Of Orientation-Ordered Y1Ba2Cu3O7-X Films Prepared By Molecular-Beam Epitaxy , J. Kwo, T.C. Hsieh, R.M. Fleming, M. Hong, Sy_Hwang Liou, B.A. Davidson, L.C. Feldman
Structural And Superconducting Properties Of Orientation-Ordered Y1Ba2Cu3O7-X Films Prepared By Molecular-Beam Epitaxy , J. Kwo, T.C. Hsieh, R.M. Fleming, M. Hong, Sy_Hwang Liou, B.A. Davidson, L.C. Feldman
Sy-Hwang Liou Publications
Superconducting Y1Ba2Cu3O7-x films were produced by metal molecular-beam epitaxy with one electron beam and two thermal cells and a molecular oxygen-gas source. The films were epitaxially grown on SrTiO3 (100) with an a-axis orientation perpendicular to the plane, and b and c axes ordered in the plane. A sharp resistive superconducting transition with Tc (R=0) at 82 K was obtained. A lower limit of the average Jc in the plane is 103 A/cm2 at 77 K, 5×104 A/cm2 at 70 K, and 10 …
Superconducting Y-Ba-Cu-O Oxide Films By Sputtering, M. Hong, Sy_Hwang Liou, J. Kwo, B.A. Davidson
Superconducting Y-Ba-Cu-O Oxide Films By Sputtering, M. Hong, Sy_Hwang Liou, J. Kwo, B.A. Davidson
Sy-Hwang Liou Publications
We have prepared superconducting thin films of Y-Ba-Cu-O with Tc onsets above 95 K by both diode and magnetron sputtering. Films with full superconductivity (R=0) at 85 K have been produced by dc magnetron sputtering. The compositions of the films are fairly uniform across an area 50 mm in diameter and through the film thickness. Structural properties of the films were studied by x-ray diffraction. Critical current densities in the range of 3000 to 104 A/cm2 have been measured at 4.2 K. Applied Physics Letters is copyrighted by The American Institute of Physics.
Interaction Of Hg Overlayers With An Ag(100) Surface, Peter A. Dowben, Y.J. Kime, Shikha Varma, M. Onellion, J.L. Erskine
Interaction Of Hg Overlayers With An Ag(100) Surface, Peter A. Dowben, Y.J. Kime, Shikha Varma, M. Onellion, J.L. Erskine
Peter Dowben Publications
The electronic band structure of one, two, and five monolayers of Hg on Ag(100) has been investigated by angle-resolved photoemission. Hg overlayers on Ag(100) form metastable structures that develop via Frank–van der Merwe growth modes. Hg-Hg hybridization results in the formation of a two-dimensional band structure while hybridization of Hg with the underlying Ag(100) substrate results in the adoption of bulklike characteristics for some Hg-induced bands. The Hg-Hg as well as Hg-Ag interactions are discussed.
Transition-Matrix Theory For Two–Photon Ionization Of Rare–Gas Atoms And Isoelectronic Ions With Application To Argon, Anthony F. Starace, Tsin-Fu Jiang
Transition-Matrix Theory For Two–Photon Ionization Of Rare–Gas Atoms And Isoelectronic Ions With Application To Argon, Anthony F. Starace, Tsin-Fu Jiang
Anthony F. Starace Publications
A transition-matrix theory for two-photon ionization processes in rare-gas atoms or isoelectronic ions is presented. Uncoupled ordinary differential equations are obtained for the radial functions needed to calculate the two-photon transition amplitude. The implications of these equations are discussed in detail. In particular, the role of correlations involving virtually excited electron pairs, which are known to be essential to the description of single-photon processes, is examined for multiphoton ionization processes. Additionally, electron scattering interactions between two electron-hole pairs are introduced into our transition amplitude in the boson approximation since these have been found important in two-photon ionization of xenon by …
Microwave Absorption In The Superconducting And Normal Phases Of Y-Ba-Cu-O, R. Durný, J. Hautala, Stephen Ducharme, B. Lee, O.G. Symko, P.C. Taylor, D.J. Zheng, J.A. Xu
Microwave Absorption In The Superconducting And Normal Phases Of Y-Ba-Cu-O, R. Durný, J. Hautala, Stephen Ducharme, B. Lee, O.G. Symko, P.C. Taylor, D.J. Zheng, J.A. Xu
Stephen Ducharme Publications
Microwave absorption in a dc magnetic field up to 12 kG, attributed to nonequilibrium contributions to the ac susceptibility, appears at Tc as the sample is cooled. ESR measurements of Y-Ba-Cu-O show that Cu2+ exists only in the fraction of the sample which is not superconducting in a distorted octahedral surrounding.
The Binary Cepheid Dl Cas And The Open Cluster Ngc 129, Hugh C. Harris, Douglas L. Welch, Robert P. Kraft, Edward G. Schmidt
The Binary Cepheid Dl Cas And The Open Cluster Ngc 129, Hugh C. Harris, Douglas L. Welch, Robert P. Kraft, Edward G. Schmidt
Edward Schmidt Publications
The Cepheid DL Cas and the nonvariable supergiant Star A are confirmed as members of NGC 129, and both are found to be spectroscopic binaries with orbital periods of a few years. Periods and orbits are determined for both stars. Star A is apparently rotating; tidal interaction with its companion is discussed and then rejected as the probable cause of the rotation. The membership of other stars and the velocity of the cluster are redetermined.
Observation Of Steepening In Electron Plasma Waves Driven By Stimulated Raman Backscattering, Donald Umstadter, R. Williams, C. Clayton, C. Joshi
Observation Of Steepening In Electron Plasma Waves Driven By Stimulated Raman Backscattering, Donald Umstadter, R. Williams, C. Clayton, C. Joshi
Donald Umstadter Publications
Harmonics of plasma waves excited by CO2-laser–induced stimulated Raman scattering have been observed by frequency- and wave-number-resolved ruby Thomson scattering. Measurements of their relative amplitudes agreed with predictions of nonlinear warm-plasma wave-steepening theory up to the maximum observed amplitude of the fundamental component, ñ1/n0=16%.
Saddle-Point Electrons In Ionizing Ion-Atom Collisions, R. E. Olson, Timothy J. Gay, H. G. Berry, V. D. Irby
Saddle-Point Electrons In Ionizing Ion-Atom Collisions, R. E. Olson, Timothy J. Gay, H. G. Berry, V. D. Irby
Timothy J. Gay Publications
We have studied H++He ionizing collisions, and find that electrons stranded between the two postcollision Coulomb centers dominate the ejected-electron spectra for intermediate (~100 keV) projectile energies. The importance of these electrons is clearly established by our classical calculations which are in qualitative agreement, in both shape and magnitude, with experimental spectra taken by us, and with earlier measurements. These ‘‘saddle-point’’ electrons are produced by a classically understandable mechanism, and are unambiguously observed at nonzero scattering angles.
The Stability And Decomposition Of Gaseous Chloroferrocenes, S. Barfuss, M. Grade, W. Hirschwalde, W. Rosinger, N.M. Boag, D.C. Driscoll, Peter A. Dowben
The Stability And Decomposition Of Gaseous Chloroferrocenes, S. Barfuss, M. Grade, W. Hirschwalde, W. Rosinger, N.M. Boag, D.C. Driscoll, Peter A. Dowben
Peter Dowben Publications
The ionic and neutral decomposition of gaseous ferrocene, 1, 1'-dichloroferrocene and 1, 1', 2,2'- tetrachloroferrocene, has been investigated via photon and electron induced ionization mass spectroscopy. The thermodynamic cycle incorporating the ionic and neutral fragments of ferrocene has been constructed. Elimination reactions in the decomposition of the dichloroferrocene and tetrachloroferrocenes have been identified.
Simulation Of Normal Rb2Zncl4 Near The Incommensurate Transition, P. J. Edwardson, V. Katkanant, John R. Hardy, L. L. Boyer
Simulation Of Normal Rb2Zncl4 Near The Incommensurate Transition, P. J. Edwardson, V. Katkanant, John R. Hardy, L. L. Boyer
John R. Hardy Papers
The purposes of the reported computer simulation of the normal (high-temperature) phase of rubidium tetrachlorozincate are to understand the disordered structure in that phase and to investigate the possibility that the transition, upon cooling, from the normal phase to one with an incommensurate modulation is associated with a change from the disordered structure to an ordered one. The simulation of the dynamics of 168 ions in a periodic structure begins from a slight perturbation of a structure that is determined by minimization of the potential energy within the constraints of the experimentally determined average symmetry. Rigid ions with short-range interactions …
Antiphase Domain Boundaries In The Superconducting Phase Of The Y-Ba-Cu-O System, C.H. Chen, J. Werder, Sy_Hwang Liou, M. Hong
Antiphase Domain Boundaries In The Superconducting Phase Of The Y-Ba-Cu-O System, C.H. Chen, J. Werder, Sy_Hwang Liou, M. Hong
Sy-Hwang Liou Publications
Transmission-electron-microscopy examination of the superconducting phase of the Y-Ba-Cu-O system reveals the presence of dense antiphase boundaries. The structure of the superconducting phase was determined to be orthorhombic with space group Pm2m. The orthorhombic a and b axes are found to alternate across the antiphase boundary which runs parallel to the [110] direction.
Break-Junction Tunneling Measurements Of The High-TC Superconductor Y1Ba2Cu3O9- Δ , J. Moreland, J.W. Ekin, L.F. Goodrich, T.E. Capobianco, A.F. Clark, J. Kwo, M. Hong, Sy_Hwang Liou
Break-Junction Tunneling Measurements Of The High-TC Superconductor Y1Ba2Cu3O9- Δ , J. Moreland, J.W. Ekin, L.F. Goodrich, T.E. Capobianco, A.F. Clark, J. Kwo, M. Hong, Sy_Hwang Liou
Sy-Hwang Liou Publications
Current-voltage tunneling characteristics in a high-critical-temperature superconducting material containing predominately Y1Ba2Cu3O9- δ have been measured using the break-junction technique. Sharp gap structure was observed, with the largest superconductive energy gap measured to be Δ=19.5±1 meV, assuming a superconductor-insulator-superconductor junction. This energy gap corresponds to 2Δ/kBTc=4.8 at T=4 K, for a critical temperature of 93 K (midpoint of the resistive transition).
Comment On "Molecular Description Of Two-Electron Atoms", Anthony F. Starace, Joseph H. Macek
Comment On "Molecular Description Of Two-Electron Atoms", Anthony F. Starace, Joseph H. Macek
Anthony F. Starace Publications
Molecular Description of Two-Electron Atoms
Magnetic Transitions And Scaling In Anisotropic Rare-Earth Glasses, Kevin M. Lee, Michael J. O'Shea, David J. Sellmyer
Magnetic Transitions And Scaling In Anisotropic Rare-Earth Glasses, Kevin M. Lee, Michael J. O'Shea, David J. Sellmyer
David Sellmyer Publications
We report studies of the magnetic critical behavior as a function of anisotropy strength in rare-earth-rich glasses. Anisotropy is induced in Gd-Co by alloying with Tb. The system studied is Gd65-xTbxCo35 and the random magnetic anisotropy (RMA) strength may be increased by increasing x. The x=0 alloy of this series has been shown to exhibit standard critical behavior expected for a second-order phase transition. With increasing x we find deviations from this behavior due to the presence of RMA. We present detailed results for the alloy with composition x=50 at. % and …
Magnetic Properties Of Fe/Nd Multilayer Films, David J. Sellmyer, Z.R. Zhao, Z.S. Shan, S. Nafis
Magnetic Properties Of Fe/Nd Multilayer Films, David J. Sellmyer, Z.R. Zhao, Z.S. Shan, S. Nafis
David Sellmyer Publications
Measurements are reported on the relationship between magnetic properties and microstructure in thin amorphous and crystalline Fe/Nd multilayer films. The samples, denoted by (XÅFe/YÅNd) ( X/Y), were prepared in a multiple-gun sputtering chamber with a microprocessor-controlled rotating table. For X and Y values less than about 20 Å an amorphous compositionally modulated structure is obtained, with magnetic properties characterized by speromagnetic ordering associated with strong Nd random anisotropy. The net magnetization in general lies in the plane of the film. The temperature and composition dependence of the coercivity, magnetization, and transition temperatures are …
Enhanced Magnetism In Amorphous Fe-Based Alloys, Sy_Hwang Liou, S.H. Ge, J.N. Taylor, C.L. Chien
Enhanced Magnetism In Amorphous Fe-Based Alloys, Sy_Hwang Liou, S.H. Ge, J.N. Taylor, C.L. Chien
Sy-Hwang Liou Publications
Systematic investigations of binary amorphous Fe–T alloys (T=an early transition-metal elements Ti, Zr, Nb, Hf, Ta...) over wide composition ranges reveal depressed magnetic properties with anomalously low magnetic ordering temperature and magnetization. We show in this work, via a prototype amorphous Fe70Ti30 alloy, the substitution of Fe by Co, Ni, or Cu greatly enhances the magnetic ordering temperature and the magnetization. Our results indicate that this is primarily caused by the increased Fe moment upon alloying.
Magnetic Granular Fe-(Sio2) Solids, C.L. Chien, Gang Xiao, Sy_Hwang Liou, J.N. Taylor, A. Levy
Magnetic Granular Fe-(Sio2) Solids, C.L. Chien, Gang Xiao, Sy_Hwang Liou, J.N. Taylor, A. Levy
Sy-Hwang Liou Publications
We have synthesized a series of granular Fe-SiO2 solids consisting of Fe metal granules of nanometer sizes embedded in an insulating SiO2 matrix. The ultrafine microstructures, revealed by TEM, are achieved by using a high-rate magnetron sputtering system. The magnetic properties of such solids are determined by the granular size and the metal volume fraction. Below the percolation threshold, isolated single-domain particles having large magnetic coercivity in the blocked state exhibit superparamagnetic relaxation, which has been studied by using SQUID magnetometry and Mössbauer spectroscopy. Above the percolation threshold, magnetic coercivity drops dramatically and the magnetic properties approach that …
Magnetic Characteristics Of Ultrafine Fe Particles Reduced From Uniform Iron Oxide Particles, K. Bridger, J. Watts, M. Tadros, Gang Xiao, Sy_Hwang Liou, C.L. Chien
Magnetic Characteristics Of Ultrafine Fe Particles Reduced From Uniform Iron Oxide Particles, K. Bridger, J. Watts, M. Tadros, Gang Xiao, Sy_Hwang Liou, C.L. Chien
Sy-Hwang Liou Publications
Uniform, cubic 0.05-µm iron oxide particles were formed by forced hydrolysis of ferric perchlorate. These particles were reduced to α-Fe by heating in hydrogen at temperatures between 300 and 500 °C. The effect of reduction temperature and various prereduction treatments on the microstructure of the iron particles will be discussed. Complete reduction to α-Fe was established by 57Fe Mössbauer spectroscopy and x-ray diffraction. Magnetic measurements on epoxy and polyurethane films containing these particles with various mass fractions gave coercivities as high as 1000 Oe. The relationship between the magnetic measurements and the microstructure will be discussed. Na2SiO …
Mössbauer Study Of Spin Reorientation In Y1.8Er0.2Fe14B, M. Abe , Sy_Hwang Liou, C.L. Chien, N.C. Koon, B.N. Das, E. Callen
Mössbauer Study Of Spin Reorientation In Y1.8Er0.2Fe14B, M. Abe , Sy_Hwang Liou, C.L. Chien, N.C. Koon, B.N. Das, E. Callen
Sy-Hwang Liou Publications
Fe57 Mössbauer spectra were taken from 300 K down to 4.2 K for two single-crystal samples of Y1.8Er0.2Fe14B, one cut with its [001] axis normal to the surface, the other with its diagonal of [100], [010], and [001] axes normal to the surface. The former sample has shown that the angle between the Fe spin and the [001] increases continuously below ~90 K. This qualitatively agrees with the spin reorientation (i.e., the easy axis of magnetization rotates away from the [001] toward [100] on cooling below ~90 K) which have already been observed …
Magnetism And Microstructure Of Compositionally Modulated Disordered Fe/Ta Films, Z.S. Shan, Z.R. Zhao, J.G. Zhao, David J. Sellmyer
Magnetism And Microstructure Of Compositionally Modulated Disordered Fe/Ta Films, Z.S. Shan, Z.R. Zhao, J.G. Zhao, David J. Sellmyer
David Sellmyer Publications
Results are presented on compositionally modulated disordered magnetic films of the form (XÅFe/YÅTa), as a function of the modulation wavelength λ≡X+Y. Magnetization, ac susceptibility, torque magnetometry, x-ray diffraction, and Mössbauer measurements are used to probe magnetic transitions and microstructure. For X and Y values less than about 12 Å the structure is amorphous within the layers and compositionally modulated in the direction perpendicular to the film. Films with ultrathin individual layers (1–3 atomic diameters) exhibit perpendicular anisotropy while the thicker ones have in-plane magnetization. Spin-glass and ferromagnetic transitions are observed and are …
Radiosensitivity Parameters For Neoplastic Transformations In C3h10t1/2 Cells, M. P. R. Waligorski, G. L. Sinclair, Robert Katz
Radiosensitivity Parameters For Neoplastic Transformations In C3h10t1/2 Cells, M. P. R. Waligorski, G. L. Sinclair, Robert Katz
Robert Katz Publications
We have evaluated radiosensitivity parameters for cellular transformation from published experimental data on neoplastic transformations induced in C3H10T1/2 cells by BEVALAC ions. The measured RBE values are well reproduced by a track theory calculation using sets of m-target parameters with either m = 2 or m = 3, suggesting a quadratic or cubic extrapolation to low doses of γ rays. Using track theory one is thus able to predict transformation frequencies in those cells after an arbitrary radiation field, under known or assumed conditions of exposure, in a manner shown earlier for cellular survival. Extension of these calculations to interpret …
The Breakdown Of Hund's Rule In Systems Of Fourfold Symmetry, Gordon A. Gallup
The Breakdown Of Hund's Rule In Systems Of Fourfold Symmetry, Gordon A. Gallup
Gordon Gallup Publications
The lowest energies of molecular systems with fourfold symmetry can violate Hund's multiplicity rule. We derive relationships between two electron integrals that in favorable cases allow one to predict when this will happen. These relationships result in a fairly simple inequality as a criterion. The systematics of the phenomenon are illustrated with a series of calculations on model systems consisting of hydrogen atoms. These are rings of three, four, five, six, seven, and eight members as well as octahedral and square planar arrangements. These show how the results and simple ideas of molecular orbital theory can be qualitatively modified when …
Inactivation Of Dry Enzymes And Viruses By Energetic Heavy Ions, M. P. R. Waligorski, Kim Sun Loh, Robert Katz
Inactivation Of Dry Enzymes And Viruses By Energetic Heavy Ions, M. P. R. Waligorski, Kim Sun Loh, Robert Katz
Robert Katz Publications
A newly developed corrected formula for the radial distribution of dose (RDD) has been used to calculate cross sections for the inactivation of dry enzymes and viruses by heavy ions ranging from 42He to 4018 Ar of energies ca. 10 MeV/a.m.u., spanning a range of LET of ca. 5–2,000 Me V cm2 g–1. In comparison with earlier “point-target” calculations of Butts and Katz where a linear range-energy relationship for electrons (δ-rays) was used, and with “extended-target” calculations of Zhang, Dunn, and Katz, where a power range-energy law and an “uncorrected” RDD formula …
Recoil Ions From Close 20-Kev H+ Collisions With O2, Co, Co2, And Ne, Akio Itoh, M. Eugene Rudd
Recoil Ions From Close 20-Kev H+ Collisions With O2, Co, Co2, And Ne, Akio Itoh, M. Eugene Rudd
M. Eugene Rudd Publications
Recoil ions ejected at 70° from 20-keV proton collisions with O2, CO, CO2, and Ne were analyzed by an electrostatic analyzer. For the molecular targets, only singly ionized ions of oxygen or carbon were detected while in the spectrum of neon ions, Ne+ and Ne2+ were both observed. The absence of O2+, CO+, and CO2+ is due to the fact that the recoil ions detected in this experiment result only from very close collisions with one of the atoms in the molecule resulting in dissociation. A possible …