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- Robert Katz Publications (6)
- Peter Dowben Publications (5)
- John R. Hardy Papers (4)
- Sy-Hwang Liou Publications (4)
- Anthony F. Starace Publications (3)
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- Edward Schmidt Publications (3)
- M. Eugene Rudd Publications (3)
- Department of Physics and Astronomy: Faculty Publications (2)
- Timothy J. Gay Publications (2)
- David Sellmyer Publications (1)
- Donald Umstadter Publications (1)
- Paul Burrow Publications (1)
- Roger Kirby Publications (1)
- Stephen Ducharme Publications (1)
Articles 1 - 30 of 37
Full-Text Articles in Physical Sciences and Mathematics
Dielectric Response Spectrum Of A Damped One-Dimensional Double-Well Oscillator, J. W. Flocken, R. A. Guenther, John R. Hardy, L. L. Boyer
Dielectric Response Spectrum Of A Damped One-Dimensional Double-Well Oscillator, J. W. Flocken, R. A. Guenther, John R. Hardy, L. L. Boyer
John R. Hardy Papers
The characteristic features of the dielectric response spectrum associated with the condensation of a "soft" phonon mode during a ferroelectric phase transition can be reproduced by an oscillator moving in a damped linear double-well potential. The behavior of the response function below the transition temperature Tc can be simulated by introducing a linear mean-field coupling which destroys the symmetry of the well. Potentials derived from physically realistic parameters are shown to result in dielectric responses which are in order-of-magnitude agreement with experimental values.
Hr Aurigae: An Active Binary ?, Charles G. Loomis, Edward G. Schmidt
Hr Aurigae: An Active Binary ?, Charles G. Loomis, Edward G. Schmidt
Edward Schmidt Publications
Photometric and spectral observations of the variable star HR Aurigae are presented. Based on these data we conclude that this star, previously regarded as a type II Cepheid, is, in fact, an active binary.
The Electrical Noise Of Carbon Fibers, R.O. Dillon
The Electrical Noise Of Carbon Fibers, R.O. Dillon
Roger Kirby Publications
The low-frequency excess electrical noise has been measured on carbon fibers with a wide range of crystalline perfection and corresponding electrical and mechanical properties. Fibers include those prepared from ex-PAN and ex-pitch polymers, and a catalytic-chemical vapor deposited filament. The extensional (Young's) moduli of these fibers varied from about 220 to 890 GPa (35–130 Msi), while the electrical resistivities varied from about 19 to 1 µΩ m. The low-frequency electrical noise of each fiber was found to be proportional to l2 and to vary as 1/fα, where f is the frequency and α is about 1.15. …
Doubly Differential Detachment Cross Sections For 0.5-Mev H- On He Including Projectile Excitation To H(N=2), Chih-Ray Liu, Anthony F. Starace
Doubly Differential Detachment Cross Sections For 0.5-Mev H- On He Including Projectile Excitation To H(N=2), Chih-Ray Liu, Anthony F. Starace
Anthony F. Starace Publications
Detailed theoretical results are presented for the electron-detachment cross section, doubly differential in both the electron momentum and angle, for the process 0.5-MeV H-+He→H(n=2)+ e-+He*. As discussed briefly elsewhere [C. R. Liu and A. F. Starace, Phys. Rev. Lett. 62, 407 (1989)], the laboratory-frame doubly differential cross sections (DDCS’s) for electron detachment in the forward direction are shown to depend sensitively on the low-energy states of the H(n=2)- e- three-body system. In particular, the angular dependence of characteristic cusp and shape resonance features is presented. We find that the projectile frame …
The Period-Decline-Rate Relation For Pulsating Stars, Edward G. Schmidt, Kathryn H. Wiese
The Period-Decline-Rate Relation For Pulsating Stars, Edward G. Schmidt, Kathryn H. Wiese
Edward Schmidt Publications
The relationships between the periods and the rate of decline in V and R for pulsating stars are investigated. It is shown that these relationships are useful for making preliminary estimates of periods for stars with little data. These estimates can then be used to optimize times of further observations.
Low-Lying Negative-Ion States Of Calcium, A.R. Johnston, Gordon A. Gallup, Paul Burrow
Low-Lying Negative-Ion States Of Calcium, A.R. Johnston, Gordon A. Gallup, Paul Burrow
Paul Burrow Publications
Studies of electron transmission through Ca vapor reveal two prominent resonances in the range 0–4 eV. The energies and widths of these temporary anion states suggest that they may be assigned to the strongly mixed (4s23d) 2D and (4s4p2)2D states of Ca-. This interpretation is supported by ab initio configuration-interaction calculations and is consistent with previously unassigned structure observed in the photodetachment cross section.
Angular And Energy Distributions Of Electrons From 7.5- 150-Kev Proton Collisions With Oxygen And Carbon Dioxide, Wen-Qin Cheng, M. Eugene Rudd, Ying-Yuan Hsu
Angular And Energy Distributions Of Electrons From 7.5- 150-Kev Proton Collisions With Oxygen And Carbon Dioxide, Wen-Qin Cheng, M. Eugene Rudd, Ying-Yuan Hsu
M. Eugene Rudd Publications
Cross sections for the ejection of electrons, differential in the angle and energy of emission, were measured for proton collisions with two molecular gases, oxygen and carbon dioxide, over the primary energy range of 7.5-150 keV and an angular range of 10° to 160°. The energy distributions, obtained by integration over the angle, were fitted by an analytical model. A discrepancy in the angular distributions compared to those of Gibson and Reid [J. Phys. E 17, 1227 (1984); J. Phys. B 19, 3265 (1986); Radiat. Res. 112, 418 (1987); Australian Atomic Energy Commission Report No. AAEC/E659, 1987 (unpublished)] is discussed. …
Particle Tracks In Diverse Media, Robert Katz
Particle Tracks In Diverse Media, Robert Katz
Robert Katz Publications
When energetic heavy ions pass into a medium, they create a trail of excitations, ionizations, and secondary electrons whose effect is represented through their average radial “dose” distribution. The structure of the track depends on this and on the observed “end point.” Tracks may be observed microscopically or through the gross effect of a particle beam. We take the medium to be an assemblage of “targets” whose response to gamma rays is approximated by the cumulative Poisson distribution. While most detectors are 1-hit systems, we have discovered 2-hit and up to 8-hit response. Folding the gamma-ray response into the radial …
Calculation Of Dielectric Susceptibility For Complex Ionic Systems: Application To A Predicted Superlattice, J. L. Feldman, L. L. Boyer, P. J. Edwardson
Calculation Of Dielectric Susceptibility For Complex Ionic Systems: Application To A Predicted Superlattice, J. L. Feldman, L. L. Boyer, P. J. Edwardson
John R. Hardy Papers
The Gordon-Kim theory of interionic interactions between closed-shell ions, which has had considerable success for existing alkali halide systems, has been applied to the determination of the structure, phonon dispersion, and room-temperature dielectric properties of a proposed superlattice, RbF(NaC1)2, of alkali halides. The dielectric properties of such a hypothetical material can have an unusually strong low-frequency dependence because of the presence of Brillouin-zonefolded "infrared”-active modes. In evaluating the standard expressions for the dielectric properties, in the rigid-ion approximation, we make use of standard cubic and quartic anharmonic terms in addition to the instantaneous-phonon cubic anharmonic term, which is …
Thermochemistry Of The Gadolinium-Copper Interface, D. Lagraffe, Peter A. Dowben, M. Onellion
Thermochemistry Of The Gadolinium-Copper Interface, D. Lagraffe, Peter A. Dowben, M. Onellion
Peter Dowben Publications
We have characterized the thermochemistry of the gadolinium-copper interface using valence-band photoemission. We find that the copper substrate binds strongly with the gadolinium overlayer, based upon valence-band binding-energy shifts that occur with increasing gadolinium coverages on Cu(100). The net potential for copper at the interface is 3.82 eV/atom which is some 0.51 eV/atom greater than the heat of sublimation for copper. The strong bonds formed between copper and gadolinium provide a thermochemical driving force for copper gadolinium-alloy formation. We observed a surface-to-bulk core-level shift for gadolinium of 0.3–0.4 eV. We also observed a Cu 3d binding-energy increase of 0.73 …
The Chromosphere Of Beta Cassiopeiae, Terry J. Teays, Edward G. Schmidt, Massimo Fracassini, Laura E. Pasinetti Fracassini
The Chromosphere Of Beta Cassiopeiae, Terry J. Teays, Edward G. Schmidt, Massimo Fracassini, Laura E. Pasinetti Fracassini
Edward Schmidt Publications
We have carried out high-resolution, long-wavelength IUE observations and ground-based photometry of the δ Scuti star β Cas. The ground-based observations were used together with previous results of Antonello et al. to ensure that the IUE observations were correctly phased relative to the photometric variation. Fluxes for the emission core of the Mg II k λ2796 line were obtained from the ultraviolet spectra over several cycles in 1986 and 1987. We found that there is an increase in the emission during part of the cycle but it occurs near minimum light in contrast to another δ Scuti star, ρ Pup, …
The Response Of The Alanine Detector After Charged-Particle And Neutron Irradiations, M. P. R. Waligorski, G. Danialy, Robert Katz
The Response Of The Alanine Detector After Charged-Particle And Neutron Irradiations, M. P. R. Waligorski, G. Danialy, Robert Katz
Robert Katz Publications
Radiosensitivity parameters of track structure theory, representing alanine as a one-hit detector, have been fitted for this free-radical amino-acid system on the basis of the available experimental data on the relative effectiveness of alanine after charged particle and neutron irradiations. The experimental data set can be reproduced by theoretical calculations, roughly to within experimental accuracy. A charged-particle “equivalent radiation” is introduced which can mimic the response of alanine to neutron irradiations. Implications of the results of model calculations for alanine on the shape of the radial distribution of δ-ray dose postulated by track theory, are discussed.
Absorption At Radio Frequencies In Superconducting Y1Ba2Cu3OY, Stephen Ducharme, R. Durny, J. Hautala, D.J. Zheng, P.C. Taylor, O.G. Symko, S. Kulkarni
Absorption At Radio Frequencies In Superconducting Y1Ba2Cu3OY, Stephen Ducharme, R. Durny, J. Hautala, D.J. Zheng, P.C. Taylor, O.G. Symko, S. Kulkarni
Stephen Ducharme Publications
The large magnetic-field-dependent ac absorption in superconducting Y1Ba2Cu3Oy ceramics and powders decreases slowly with increasing frequency in the range 2–16 MHz. The magnetic-field-dependent ac absorption is observed below Tc in superconducting Y1Ba2Cu3Oy ceramics, powders and twinned crystals and in (La,Sr)2 CuO2 and BaPb0.75 Bi0.25 CuO3 powders and appears to contain distinct contributions from trapped flux and/or intragrain tunnel junctions and from ordinary superconductor surface impedance. The contribution from trapped flux and/or intragrain tunnel junctions is important in dc magnetic fields …
Magnetic Ordering Of Thin Gd Overlayers, D. Lagraffe, Peter A. Dowben, M. Onellion
Magnetic Ordering Of Thin Gd Overlayers, D. Lagraffe, Peter A. Dowben, M. Onellion
Peter Dowben Publications
1–6-monolayer-thick films of Gd have been studied with use of synchrotron-radiation photoemission. A method is described that utilizes the linear light polarization to obtain information about the overlayer magnetization. The method is complementary to electron-spin-polarization techniques. The thinner Gd overlayers exhibit a local magnetization component along the surface normal that decreases for thicker overlayers. The Gd films exhibit a 5d exchange splitting that changes from approximately 1.1 to 0.6 eV as the overlayer thickness increases.
Mixed-Crystal Lattice Dynamics Of HfXTi1-XSe2, Vanvilai Katkanant, Roger D. Kirby
Mixed-Crystal Lattice Dynamics Of HfXTi1-XSe2, Vanvilai Katkanant, Roger D. Kirby
Department of Physics and Astronomy: Faculty Publications
The first-order Raman spectra of the mixed-crystal layered compound HfxTi1-xSe2 have been studied over the whole range of concentrations 0≤x≤1. Both pure compounds, TiSe2 and HfSe2, have the CdI2 structure and so have two Raman-active phonons of A1g phonon is at about 205 cm -1. As x is decreased from 1.0, a new Raman peak, of A1g symmetry, appears near 180 cm -1. As x is decreased further, this peak shifts smoothly upwards in frequency, until it finally merges (by x=0.05) with the pure TiSe2 A …
Chemical Vapor Deposition Of Boron And Boron Nitride From Decaborane(L4) A), Yoon Gi Kim, Peter A. Dowben, J.T. Spencer, G.O. Ramseyer
Chemical Vapor Deposition Of Boron And Boron Nitride From Decaborane(L4) A), Yoon Gi Kim, Peter A. Dowben, J.T. Spencer, G.O. Ramseyer
Peter Dowben Publications
We have investigated photoassisted, plasma enhanced chemical vapor deposition and pyrolytic deposition of boron from decaborane (B10H14) and boron nitride from decaborane combined with nitrogen or ammonia. The use of decaborane for depositing boron and boron nitride thin films is seen as a viable alternative to diborane or boron halides.
Fundamental Magnetic Studies Of Iron-Rare-Earth-Metalloid Alloys Grant Numbers: De-Fgo2-86er45262, David J. Sellmyer
Fundamental Magnetic Studies Of Iron-Rare-Earth-Metalloid Alloys Grant Numbers: De-Fgo2-86er45262, David J. Sellmyer
David Sellmyer Publications
This research is focused on the synthesis of new iron-rare-earth magnetic phases which may have significant technological properties. An important aim is to investigate new methods for producing these materials such as melt spinning and sputtering plus specific heat treatments. Studies are made of the relationship between microstructure and properties such as coercivity, spontaneous magnetization, and anisotropy (magnitude and direction) in bulk and thin film samples. Our goal is to understand these relatively complex materials on the basis of fundamental electronic structure, theory is of itinerant magnetism and localized 4f electronic states, and the microstructural effects which control the extrinsic …
Orientation Of Hydrogen 2P After Tilted-Foil Excitation, C. J. Liu, Timothy J. Gay, K. P. Schuler
Orientation Of Hydrogen 2P After Tilted-Foil Excitation, C. J. Liu, Timothy J. Gay, K. P. Schuler
Timothy J. Gay Publications
The circular polarization of Lyman-α photons resulting from beam-tilted-foil excited H(2p) was measured at energies between 9 and 20 keV with foil tilt angles up to 60°. Various interaction models are used to fit the data, and their physical significance is discussed.
Detector Response To Swift Heavy Ions, Robert Katz
Detector Response To Swift Heavy Ions, Robert Katz
Robert Katz Publications
Track theory is a description of the structure of particle tracks which characterizes the response of many different sorts of "detectors" to energetic heavy ions. It is a parametric rather than a mechanistic description. The medium is a black box containing targets whose response to gamma rays is described by the cumulative Poisson distribution. The response to swift heavy ions is intimately related to the response to gamma rays through the radial distribution of dose about the ion’s path.
Ferroelectricity In Perovskitelike Nacaf3 Predicted Ab Initio, P. J. Edwardson, L. L. Boyer, R. L. Newman, D. H. Fox, John R. Hardy, J. W. Flocken, R. A. Guenther, Wai-Ning Mei
Ferroelectricity In Perovskitelike Nacaf3 Predicted Ab Initio, P. J. Edwardson, L. L. Boyer, R. L. Newman, D. H. Fox, John R. Hardy, J. W. Flocken, R. A. Guenther, Wai-Ning Mei
John R. Hardy Papers
The ability of zero-stress simulations, using Gordon-Kim pair potentials, to describe the structures and transformations of known fluoride-based perovskites is demonstrated for the case of KCaF3. When K+ is replaced by Na+ a new ferroelectric crystal isomorphous with LiNbO3 is predicted. The equivalent relationships of the ferroelectric lithium niobate structure with the perovskite and antiperovskite structures are examined. A polarization of 21 jµC/cm2 at room temperature and a transition temperature of 550 K are predicted for NaCaF3. Surface effects are examined in simulations of a 1080-ion cluster.
The Decomposition Of [Mn(Co)5]2(Μ-Sih2), G.T. Stauf, Peter A. Dowben, K. Emrich, W. Hirschwald, N.M. Boag
The Decomposition Of [Mn(Co)5]2(Μ-Sih2), G.T. Stauf, Peter A. Dowben, K. Emrich, W. Hirschwald, N.M. Boag
Peter Dowben Publications
The prospect of using chemical vapor deposition to deposit mixed metals and silicides from a single source compound is attractive but largely uninvestigated. Studies of decomposition energies of such compounds are nearly nonexistent. One such compound which has successfully been used to make a silicide coating is [Mn(CO)5 12 (μ-SiH2). We have used electron impact mass spectroscopy, photoionization mass spectroscopy, and photoabsorption to determine bond energies within this compound. The combination of methods allows a high degree of confidence in the resultant ionization and fragment appearance potentials. Some possible mechanisms of decomposition are discussed. A complete …
The Influence Of Crystallographic Order Upon The Electronic Structure Of Thin Mercury Overlayers, Peter A. Dowben, M. Onellion, Shikha Varma, Y.J. Kime, J.L. Erskine
The Influence Of Crystallographic Order Upon The Electronic Structure Of Thin Mercury Overlayers, Peter A. Dowben, M. Onellion, Shikha Varma, Y.J. Kime, J.L. Erskine
Peter Dowben Publications
Thin ( 1-7 monolayer) well-ordered, disordered, and liquid Hg overlayers on Ag(100) have been investigated with angle resolved photoemission and low-energy electron diffraction. The well-ordered overlayers exhibit new electronic states as a result of the strained, cubic, overlayer crystallographic structure. The new electronic states depend upon the long-range crystallographic order of the overlayer, not simply the local crystallographic symmetry. The photoemission cross section and branching ratio of the 5d mercury states depends on the overlayer long-range crystallographic order and cannot be explained by photoelectron diffraction.
Variational Principle For High-Order Perturbations With Application To Multiphoton Processes For The H Atom, Bo Gao, Anthony F. Starace
Variational Principle For High-Order Perturbations With Application To Multiphoton Processes For The H Atom, Bo Gao, Anthony F. Starace
Anthony F. Starace Publications
The variationally stable procedure for Nth-order perturbative-transition-matrix elements introduced by the authors [Phys. Rev. Lett. 61, 404 (1988)] is presented here in detail. Its key features are that it is noniterative, involves only two unknown functions regardless of the value of N, is stable even near intermediate-state resonances (due to the presence of energy numerators rather than energy denominators), and uses the inverse of the perturbation operator for N≥3. Explicit formulas are presented for application to high-order multiphoton processes in atomic hydrogen. Numerical results for multiphoton-ionization cross sections (for two, three, and seven photons), for the frequency dependence …
Preparation Of High TCTl-Ba-Ca-Cu-O Thin Films By Pulsed Laser Evaporation And Tl2O3 Vapor Processing, B. Johs, D. Thompson, N.J. Ianno, John A. Woollam, Sy_Hwang Liou, A.M. Hermann, Z.Z. Sheng, W. Kiehl, O. Shams, X. Fei, L. Sheng, Y.H. Liu
Preparation Of High TCTl-Ba-Ca-Cu-O Thin Films By Pulsed Laser Evaporation And Tl2O3 Vapor Processing, B. Johs, D. Thompson, N.J. Ianno, John A. Woollam, Sy_Hwang Liou, A.M. Hermann, Z.Z. Sheng, W. Kiehl, O. Shams, X. Fei, L. Sheng, Y.H. Liu
Sy-Hwang Liou Publications
Tl-Ba-Ca-Cu-O superconducting thin films with zero-resistance temperatures up to 115 K have been prepared using a Tl2O3 vapor process on Ba-Ca-Cu-O precursor thin films. The Ba-Ca-Cu-O thin films were made by laser deposition on Y-stabilized ZrO2 substrates. This technique minimizes problems caused by the toxicity of Tl2 O3, and its subsequent decomposition to the volatile and toxic Tl2 O upon heating. Therefore, it may have practical application in the fabrication of high Tc Tl-Ba-Ca-Cu-O superconducting thin-film devices.
Superlattice Modulation And Epitaxy Of Tl2Ba2Ca2Cu3O10 Thin Films Grown On Mgo And Srtio3 Substrates, C.H. Chen, M. Hong, D.J. Werder, J. Kwo, Sy_Hwang Liou, D.D. Bacon
Superlattice Modulation And Epitaxy Of Tl2Ba2Ca2Cu3O10 Thin Films Grown On Mgo And Srtio3 Substrates, C.H. Chen, M. Hong, D.J. Werder, J. Kwo, Sy_Hwang Liou, D.D. Bacon
Sy-Hwang Liou Publications
We compare the superlattice modulation, microstructure, and epitaxy of Tl2Ba2Ca2Cu3O10 thin films grown on MgO [100] and SrTiO3 [100] substrates by dc diode sputtering. Films grown on MgO were found to be quite clean with the c axis perpendicular to the substrate. However, no in-plane orientational relationship to the substrate was found. Films grown on SrTiO3, on the other hand, showed very good epitaxy to the substrate despite the presence of second phases. Films grown on MgO also exhibited a longer coherence length of the superlattice modulation than …
Electrical Response Of Superconducting Yba2Cu3O7- Δ To Light, W.S. Brocklesby, Don Monroe, A.F.J. Levi, M. Hong, Sy_Hwang Liou, J. Kwo, C.E. Rice, P.M. Mankiewich, R.E. Howard
Electrical Response Of Superconducting Yba2Cu3O7- Δ To Light, W.S. Brocklesby, Don Monroe, A.F.J. Levi, M. Hong, Sy_Hwang Liou, J. Kwo, C.E. Rice, P.M. Mankiewich, R.E. Howard
Sy-Hwang Liou Publications
We have studied the effect of visible and near-infrared light on the electrical properties of superconducting thin films of YBa2Cu3O7- δ . The responses we observe can all be explained in terms of light heating the film to a temperature above the superconducting transition. No evidence that the light directly affects superconductivity was found.
Metastable Conduction States In Mo2S3: Conductivity Fluctuations, R.L. Fagerquist, Roger D. Kirby, Edgar A. Pearlstein
Metastable Conduction States In Mo2S3: Conductivity Fluctuations, R.L. Fagerquist, Roger D. Kirby, Edgar A. Pearlstein
Department of Physics and Astronomy: Faculty Publications
In this paper, we present the results of measurements of the frequency and temperature dependences of the electrical noise in Mo2S3. It will be seen that the frequency dependence of the noise is completely consistent with the double-well potential model for the carriers in Mo2S3 introduced in an earlier paper [Phys. Rev. B 38, 3973 (1988)]. In the earlier paper, we showed that at temperatures below 145 K, the carriers in Mo2S3 could exist in either a weakly conducting ground state or a relatively highly conducting metastable state. The conductivity …
Differential Cross Sections For Ejection Of Electrons From Rare Gases By 7.5- 150-Kev Protons, Wen-Qin Cheng, M. Eugene Rudd, Ying-Yuan Hsu
Differential Cross Sections For Ejection Of Electrons From Rare Gases By 7.5- 150-Kev Protons, Wen-Qin Cheng, M. Eugene Rudd, Ying-Yuan Hsu
M. Eugene Rudd Publications
Absolute cross sections for the ejection of electrons by ;proton impact that are differential in the angle and energy of the electrons have been measured for :helium, neon, and krypton. The primary energy ranged from 7.5 to 150 keV, the angles from 10° to 160°, and the measured energies from 1 to 550 eV. These data along with earlier data on argon are used to study the systematics of proton impact ionization of the rare gases. An analytical model is employed to correlate and systematize the cross-section differential in ejected-electron energy. For low-energy collisions the angular distribution of electrons ejected …
Highly Oriented Tl2Ba2Ca2Cu3O10 Thin Films By Pulsed Laser Evaporation, Sy_Hwang Liou, K.D. Aylesworth, N.J. Ianno, B. Johs, D. Thompson, D. Meyer, John A. Woollam, Colleen Berry
Highly Oriented Tl2Ba2Ca2Cu3O10 Thin Films By Pulsed Laser Evaporation, Sy_Hwang Liou, K.D. Aylesworth, N.J. Ianno, B. Johs, D. Thompson, D. Meyer, John A. Woollam, Colleen Berry
Sy-Hwang Liou Publications
We have fabricated superconducting thin films on MgO(100) substrates with nearly pure Tl2Ba2Ca2Cu3O10 (2:2:2:3) phase using pulsed laser evaporation and post-annealing. The films had c axes perpendicular to the substrates. Superconducting films with onset temperatures of 125 K and zero resistance at 110 K were obtained. X-ray microprobe fluorescence measurements indicate that a typical composition of films is Tl0.66Ba1.77Ca1.46Cu3Oχ, which is low in Tl compared to that expected for the 2:2:2:3 phase. A typical grain size is greater than 10 µm …
Elastic Angular Differential Cross Sections For Quasi-Oneelectron Collision Systems At Intermediate Energies: (Na+, Li+)+H And (Mg+, Be+)+He, J. L. Peacher, E. Redd, D. G. Seely, Timothy J. Gay, D. M. Blakenship, J. T. Park
Elastic Angular Differential Cross Sections For Quasi-Oneelectron Collision Systems At Intermediate Energies: (Na+, Li+)+H And (Mg+, Be+)+He, J. L. Peacher, E. Redd, D. G. Seely, Timothy J. Gay, D. M. Blakenship, J. T. Park
Timothy J. Gay Publications
Measurements of elastic angular differential cross sections have been carried out for four quasi-one-electron collision systems at intermediate energies. Data are presented for Na++H collisions at laboratory energies of 35.94, 51.75, 63.89, and 143.75 keV, for Li++H collisions at energies of 19.44 and 43.75 keV, for Mg++He collisions at energies of 30, 66.7, and 150 keV, and for Be++He collisions at an energy of 56.25 keV. The highest energy in each case corresponds to a projectile velocity of (1/2 a.u. Born and Eikonal calculations, in which we model the projectile ion as …