Bulletin of the American Physical Society
2006 73rd Annual Meeting of the Southeastern Section of the APS
Thursday–Saturday, November 9–11, 2006; Williamsburg, Virginia
Session GC: Poster Session |
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Room: Williamsburg Hospitality House Empire C, Friday, Nov. 10: 8:00am - 10:00am |
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GC.00001: Problem Solving Approach: Computer vs. Textbook Evan Richards, Jeff Polak, Ashley Hardin, Mary Bridget Kustusch, John Risley Given the abundant use of worked examples and problems as learning material in physics textbooks, it is appropriate to investigate methods of implementing them in the classroom. In particular, a version of the textbook worked examples and problems implemented on a computer with auto-grading and recording features, would allow instructors to track which students complete the computer versions. In addition, computers offer interactivity, which is not practical with the inherent constraints of the textbook implementation. This study seeks to compare student performance in solving physics problems in two separate formats: computer and textbook. Each problem was preceded by a related worked example in the same format. T-tests reveal no significant differences in mean performance between the two groups. However, error analysis denoted significant differences in the group correlations to error type, which prompted the approach analysis to be undertaken. The results of this study will be presented. [Preview Abstract] |
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GC.00002: Rayleigh Scattering R. Seth Smith The scattering experiment is one of the most widely used techniques in physics for understanding the nature of the microscopic world. This work describes a scattering experiment suitable for use with undergraduates. The theory of Mie Scattering describes the scattering of light from particles of any size. However, if one confines his attention to light with a wavelength that is significantly larger than the particle size, the scattering is described by a simpler theory known as Rayleigh Scattering. In this case, Rayleigh Scattering predicts that the intensity of the scattered radiation is inversely proportional to the fourth power of the wavelength of the light. In this experiment, visible light (500-600 nm) from a tunable dye laser is incident on a sample of latex microspheres with a diameter of 30 nm. The scattered light intensity is monitored with a photomultiplier tube and plotted as a function of laser wavelength. The details of the experiment setup and plots of the results will be presented. [Preview Abstract] |
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GC.00003: A two-state quantum level and power analysis of event-related scalp potential data relevant to the detection of deception and to the discrimination of correlates of high-order cognitive functioning. Michael Schillaci We propose a novel analysis approach for scalp potential data within a Quantum Mechanical formalism for voltage measures obtained during truthful and deceptive responses to questions regarding autobiographical information; our results not only provide independent verification for recent studies showing that surface skin temperature may improve the accuracy of traditional polygraph, but also provides an argument for the appropriateness and efficacy of the quantum-level analysis offered. Regional attenuation and cognitive activity levels for areas of neurophysiological significance are assessed and show that deceptive response-states emit between $8\%$ and $10\%$ less power. A time course analysis of the cognitive activity over posterior and anterior regions of the brain supports this finding suggesting that neocortical interactions reflecting differing workload demands during executive and semantic processes take longer for the case of deception. [Preview Abstract] |
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GC.00004: The Explanation of the Pauli Exclusion Principle Victor Vasiliev, Russell Moon Using the principles of the Vortex Theory,$^{ }$the alpha particle, and the theory that the nucleus is constructed out of alpha particles, the explanation of the Pauli Exclusion Principle is easily explained. Because protons and electrons are connected to each other via a fourth dimensional vortex, they spin in opposite directions. Since the alpha particle possesses two protons possessing opposite spins, their electrons also possess opposite spins. With a nucleus constructed out of alpha particles, all paired electrons in shells and sub-shells will spin in opposite directions. 1.R.Moon, F.Calvo, V.Vasiliev. About of the Conservation of Lepton Number, Bulletin of the APS, \href{http://www.phys.ufl.edu/sesaps05.html} {72nd Annual Meeting} November10-12, 2005. Gainesville, Fla, USA, BC.00008. 2.K.Gridnev, R.Moon, V.Vasiliev. Experiment that discovered the Photon Acceleration Effect, International Symposium on Origin of Matter and Evolution of Galaxies (OMEG05), New Horizon of Nuclear Astrophysics and Cosmology, November 8-11, 2005, University of Tokyo, Tokyo, Japan, p. 77. 3. R.Moon, F.Calvo, V.Vasiliev. The Neutral Pentaquark. 2006 APS April Meeting, Dallas, TX, USA, Nuclear Theory II, Abstract 00009. [Preview Abstract] |
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GC.00005: Photoproduction of Neutral Kaons on Deuterons Brian Beckford Experimentation to greater understand the strangeness production mechanism can be performed by observing the electromagnetic interaction that leads to Kaon photoproduction. The \textit{n ($\gamma $, ${\rm K}$}$^{0}$\textit{) $\Lambda $} reaction may assist in answering questions about the strangeness photo-production process. An experiment into the elementary Kaon photoproduction process was investigated in an experiment conducted at the Laboratory of Nuclear Science of Tohoku University (LNS) using the Neutral Kaon Spectrometer. (NKS). The experiment was conducted by the \textit{d ($\gamma $, ${\rm K}$}$^{0})$ reaction. ${\rm K}^{0}$ will be measured in the \textit{${\rm K}$}$^{0}$\textit{$\rightarrow \pi$}$^{+}$\textit{$\pi $}$^{-}$ decay chain by the NKS. The NKS implements many detectors working in coincidence: These ranging from the Tagged Photon Beam generated by the 1.2 GeV Electron beam via bremsstrahlung, an Inner Plastic Scintillator Hodoscope (IH), a Straw Drift Chamber (SDC), a Cylindrical Drift Chamber (CDC), and an Outer Plastic Scintillator Hodoscope. Due to the background produced through the \textit{$\gamma \rightarrow $ e+e-} process, electron veto counters (EV) were placed in the middle of the OH to reject charged particles in the horizontal plane of the beam line. Preliminary analysis of the data indicates the need for pulse height correction. This was achieved by analysis of the Inner and Outer hodoscopes, and determining the energy deposit in the scintillators. [Preview Abstract] |
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GC.00006: Search for the pentqauark partners: $\Sigma^0$, $\mathrm{N}^0$ and $\Theta^{++}$ Yi Qiang In 1997 based on chiral soliton model a narrow exotic state, $\Theta^+$(1540), which has quark component $uudd\bar{s}$, was predicted in a SU(3)$_F$ antidecuplet of pentaquarks. If such state exists, other members of the antidecuplet could be expected to have sufficiently narrow widths to be observed as well. The Jefferson Laboratory experiment E04-012 focused on the search for $\Sigma^0$ and N$^0$ partner states in the missing mass spectra of the H(e,e'K$^+$)X and H(e,e'$\pi^+$)X channels. In addition, if the $\Theta^+$ has non-zero isospin then a hypothetical isospin partner, $\Theta^{++}$, might be expected in the H(e,e'K$^-$)X channel which was also studied. The experiment was performed in Hall~A at Jefferson Lab using a 5~GeV CW electron beam incident on a liquid hydrogen target. The two high resolution spectrometers were coupled to septum magnets to get 6 degrees' forward angles. Kaons were identified using a combination of a ring-imaging Cherenkov detector and two aerogel Cherenkov counters. The missing mass resolution was determined to be 3.5~MeV FWHM using neutron, $\Lambda$(1116) and $\Sigma$(1193) productions and provided a high sensitivity to narrow resonances. A precise measurement of the $\Lambda$(1520) resonance has also been conducted for a cross-section comparison. As a result, no significent narrow structures were observed in any of the three channels so a Feldman-Cousins approach was used to determine the 90\% confidence interval. [Preview Abstract] |
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GC.00007: A study on the reflectivity of Tyvek Alvaro Chavarria Tyvek is a permeable, strong, white material made by Dupont. Due to its high reflectivity, many physics experiments use Tyvek to increase the collection of light. The Super-Kamiokande neutrino experiment in Japan uses this material extensively in its outer detector and its reflective properties are part of the Super-K Geant3 Monte Carlo simulation. Currently, the reflective properties of Tyvek that are in the Super-K simulation are not precisely known. Thus, a good way to improve the outer detector (OD) simulation might be to implement a more realistic model for the reflection of photons on the Tyvek surface. An experiment was developed to measure the reflectivity (percentage of light reflected at a particular angle for a particular angle of incidence of the incoming photons) of Tyvek under water, for all angles of incidence and all angles of reflection. Preliminary results have been obtained and will be presented at the conference. Once all results are in, it will be attempted to fit the reflectivity function to Lambert's cosine law or some variation of it. After a successful experimental fit is found, the model will be implemented into Super-K's Monte Carlo simulation. [Preview Abstract] |
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GC.00008: Measuring scintillation light using Visible Light Alvaro Chavarria A new search for the neutron electric dipole moment (EDM) using ultra cold neutrons proposes an improvement on the neutron EDM by two orders of magnitude over the current limit (to $10^{-28}$ e*cm). Detection of scintillation light in superfluid $^4$He is at the heart of this experiment. One possible scheme to detect this light is to use wavelength-shifting fibers in the superfluid $^4$He to collect the scintillation light and transport it out of the measuring cell. The fiber terminates in a visible light photon counter (VLPC). VLPCs are doped, silicon based, solid state photomultipliers with high quantum efficiency (up to 80\%) and high gain ($\approx$40000 electrons per converted photon). Moreover, they are insensitive to magnetic fields and operate at temperatures of $\approx$6.5K. A test setup has been assembled at Duke University using acrylic cells wrapped in wavelength-shifting fibers that terminate on VLPCs. This setup is being used to evaluate the feasibility of this light detection scheme. The results obtained in multiple experiments done over the past summer (2006) and the current status of the project will be presented at the conference.\newline Reference:\newline A New Search for the Neutron Electric Dipole Moment, funding pre-proposal by the EDM collaboration; R. Golub and S. Lamoreaux, Phys. Rep. 237, 1 (1994). [Preview Abstract] |
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GC.00009: Behavior of Pulsed and Continuous-Wave Optical Dipole Force Traps M. Shiddiq, E.M. Ahmed, M.D. Havey, C.I. Sukenik, R.R. Jones, D. Cho To date, almost all far-off-resonance traps (FORT) for confining ultracold atoms have used continuous-wave (cw) laser light. Recently, in addition to studies of a cw FORT, we have been investigating the behavior of a pulsed FORT constructed using a mode-locked Nd:YAG laser with 100 picosecond pulses. Both FORTs are loaded from a rubidium magneto-optical trap (MOT). For cw and pulsed traps of equal average power, we will present a quantitative side-by-side comparison of the trap loading and holding dependence on such quantities as MOT intensity and detuning, MOT hyperfine repumper laser intensity, loading time, and FORT power. We have found that although the pulsed and cw traps behave similarly in most respects, there is a notable difference in dependence on MOT laser detuning during FORT loading. We will also present preliminary spectroscopic data of atoms confined in both the cw and pulsed FORTs. Finally, we will discuss progress on implementing the free electron laser (FEL) at Jefferson Lab to make an optical trap for atomic physics and cold chemistry applications with a well depth several orders of magnitude greater than achievable with a typical table-top laser. Supported in part by the National Science Foundation, Jefferson Laboratory, and Old Dominion University. [Preview Abstract] |
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GC.00010: Measurement of Intensity-Dependent Trap Loss in a Rb-Ar* MOT M.K. Shaffer, C.I. Sukenik We have measured the intensity dependence of the inter-species trap loss rate coefficients in collisions between ultracold rubidium (Rb) and ultracold metastable argon (Ar*) simultaneously confined in a dual species magneto-optical trap (MOT). Using a modified residual gas analyzer as a quadrupole mass spectrometer, we identify both heteronuclear Penning ionization and heteronuclear associative ionization as trap loss mechanisms. We have also made trap loss measurements in the Ar* MOT alone, where both Penning and associative ionization are observed as well. We will present our findings and discuss ongoing and future studies of the interaction between Rb and Ar* at ultracold temperatures. Support provided by the National Science Foundation and the Office of Naval Research. [Preview Abstract] |
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GC.00011: Driven Microbead Rheology of Fibrin Gels R.C. Spero, B. Smith, J. Cribb, T.E. O'Brien, S.T. Lord, R. Superfine The rheological properties of fibrin, the primary structural element in blood clots, have been widely studied at the macroscopic level, because its mechanical properties are critical to its physiological function. Microbead rheology (MBR) shows promise for advancing this field in various ways. First, MBR can be performed on small sample quantities ($\sim $1 uL), which is useful for high-throughput experimentation; second, fibrin's complex structure has a range of length scales, such that large cells may not propagate while small viruses diffuse easily through the mesh. Microbeads from 10 um to under 500 nm can probe these length scales. These characteristics suggest MBR could be useful in screening drugs for disorders involving variant clot rigidity. We report on efforts to measure the rheology of fibrin gels over the course of its polymerization. A magnetic force microscope applies pulsed forces to microbeads suspended in fibrin gels. Beads are monitored on an inverted microscope and their positions tracked by software over the 30-minute course of the gelation. A single mode Jefferies model is used to extract viscosity and elasticity from the beads' creep-recovery. [Preview Abstract] |
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GC.00012: QCM Studies of Alcohols as Vapor Phase Lubricants for MEMS Heather Nemetz, Jon Jones, Tonya Coffey The future of nanotechnology depends in part upon the development of successful lubrication for micromachines (MEMS). Atomic Force Microscopy (AFM) research at Pennsylvania State University* has suggested alcohols such as propanol, ethanol, butanol, and pentanol to be potential vapor phase lubricants for MEMS; propanol at its vapor pressure can greatly reduce the friction on silicon dioxide surfaces. Due to the relatively high vapor pressure of these alcohols, all surfaces of a MEMS, including buried interfaces not easily reached by solid coatings, should become coated in thin layers of the alcohol upon exposure. We are testing the ability of the alcohols to migrate to buried interfaces in the MEMS. The mass uptake of the alcohols will be measured using the quartz crystal microbalance (QCM) in a vacuum chamber. The resonant frequency of the QCM drops as alcohols adsorb on its face. The uptake of the alcohols is measured as the pressure increases using different geometries of the cans, allowing us to simulate a buried interface. The aforementioned alcohols are first thermally distilled, then leaked into the chamber until vapor pressure of the alcohol is reached. We see significant mass uptake even in extreme geometries, where the entire QCM face is only accessible through a tiny hole in the can encasing the QCM, 0.0006'' in diameter. *K. Strawhecker et al., Trib. Lett. 19, 17 (2005). [Preview Abstract] |
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GC.00013: Modification of Bulk Nb Surfaces Using Ar/BF$_{3}$ and Ar/Cl$_{2}$ Plasmas M. Raskovic, S. Popovic, L. Vuskovic In-situ plasma treatment is one of the promising methods for preparation of Nb surface in superconducting radio-frequency cavities. The aim of our work is to remove Nb oxides and other poor superconductors from the bulk niobium surface and to eliminate surface roughness. Since Nb forms volatile fluorides and chlorides, reactive gas mixture can contain fluoride and/or chloride based gases. We exposed the Nb surface to Ar/Cl$_{2}$ reactive gases mixture in the microwave cavity discharge system [1] and to Ar/BF$_{3 }$in the repetitively pulsed d.c. diode system [2]. Optical and mass spectrometry methods were employed for process monitoring during the surface exposure to the discharges. Treated surfaces were characterized with optical microscope, scanning electron microscope, and scanning probe microscope. The preliminary studies on the planar samples show improvement of the surface smoothness comparing to buffered chemical polishing method, currently in use. Further, the gas-phase kinetics study of both discharges used in our work is being performed. These results will be compared with the process diagnostics data in order to develop better understanding of the surface modification processes. The results will be presented at the conference. [1] M. Raskovic, et al., Proc. EPAC 2006, Edinburgh, Scotland, MOPCH184. [2] S. Radovanov, et al., J. Appl. Phys. \textbf{98}, 113307 (2005). [Preview Abstract] |
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GC.00014: Stationary Shock Wave Structures in a Microwave Flowing Afterglow D.J. Drake, J. Upadyay, S. Popovic, L. Vuskovic To understand the interaction between an acoustic shock wave and a weakly ionized gas, many experiments [1, 2] have been performed in recent years. There are several approaches where this interaction can manifest itself, such as the enhancement of optical radiation, plasma-induced shock dispersion and acceleration, shock wave induced double electric layer, and localized increase in electron temperature and density. Our experiments with acoustic shock waves and weakly ionized gases were performed in a supersonic microwave flowing afterglow in which was placed a model of generic geometry. Oblique shock parameters were evaluated exactly for the given geometry that was usually spherical. We observed an enhancement in the optical radiation across the shock layer, which coincided with the calculated standoff distance. We studied the stationary shock structure using the 4p excited state populations of argon, measured using absolute emission spectroscopy. Additionally, we studied the shock structure using higher energy states (4d, 6s). Interpretation of the results will be presented at conference. \newline [1] S. Popovic, L. Vu\v{s}kovic, Phys. Plasmas \textbf{6} (1999) 1448. \newline [2] P. Bletzinger, B. N. Ganguly, A. Garscadden, Phys. Plasmas \textbf{7} (2000) 4341. [Preview Abstract] |
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GC.00015: Electron Impact Ionization of Heavier Ions including relativistic effects B.C. Saha, A.K.F. Haque, M.A. Uddin, A.K. Basak The demands of the electron impact ionization cross sections in diverse fields are enormous. And this is hard to fulfill either by experimental or a\textit{b initio }calculations. So various analytical and semi-classical models are applied for a rapid generation of ionization cross sections accurately. We have applied a modified version [1] of the Bell et. al. equations [2] including both the ionic and relativistic corrections. In this report we show how to generalize the MBELL parameters for treating the orbital quantum numbers \textit{nl} dependency; the accuracy of the procedure is tested by evaluating cross sections for various species and energies. Detail results will be presented at the meeting. \newline \newline [1] A. K. F. Haque, M. A. Uddin, A. K. Basak, K. R. Karim and B. C. Saha, Phys. Rev. A73, 052703 (2006). \newline [2] K. L. Bell, H. B. Gilbody, J. G. Hughes, A. E. Kingston, and F. J. Smith, J. Phys. Chem. Ref. Data 12, 891 (1983). [Preview Abstract] |
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GC.00016: Magnetic Properties of the Insulating Lower Dimensional Mixed Magnet Mn/Ni Dichloride Monohydrate G.C. DeFotis, T.M. Owens, W.M. May, J.H. Boyle, E.S. Vos, Y. Matsuyama, A.T. Hopkinson This new mixed magnet is composed of the lower dimensional insulating magnets Mn dichloride monohydrate and Ni dichloride monohydrate, both studied previously by us. Each is a quasi-one-dimensional Heisenberg system with antiferromagnetic ordering appearing near 2.17 K (Mn system) and 5.6 K (Ni system) due to interchain exchange. The mixed system has been prepared and studied across the complete composition range. High temperature magnetic susceptibilities are analyzed to yield Curie and Weiss constants of mixtures. Analysis of the composition dependence of the Weiss constant implies that unlike-ion exchange interactions are comparable to like-ion interactions and are ferromagnetic. The temperature and composition dependence of magnetization isotherms is also examined. Most notable is the dependence of the magnetic susceptibility on temperature and composition. The kind of maxima seen for the pure components do not appear in mixtures, though sometimes subtler features can be identified. This behavior, across the entire composition range, seems to be unprecedented. Presumably disorder resulting from mixing, along with the lower dimensional character, is strong enough that magnetic long range order does not occur. [Preview Abstract] |
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GC.00017: Mid-Infrared Emission from Sensitized Pr$^{3+}$ in the Low Phonon-Energy Host KPb$_{2}$Cl$_{5}$ Althea Bluiett, Ei Brown, Uwe Hommerich, Sudhir Trivedi Energy transfer from Yb$^{3+}$ to Pr$^{3+}$ was explored in the low-phonon energy host KPb$_{2}$Cl$_{5 }$for 4-5 $\mu $m solid-state laser development. The incorporation of two rare-earth (RE) ions in a low-phonon energy host is expected to increase critical laser parameters such as pump efficiency and emission intensity through energy transfer. Moreover, incorporating the RE ions in a low phonon-energy host is expected to reduce the detrimental effects of non-radiative decay through multi-phonon emission. Evidence of efficient energy transfer was observed in Yb$^{3+} \rightarrow $Pr$^{3+}$ under 980 nm laser excitation This was accomplished by exciting the $^{3}$H$_{4}\rightarrow ^{1}$G$_{4}$ absorption transition of Pr$^{3+}$ at 980 nm in singly doped Pr: KPb$_{2}$Cl$_{5}$ and the $^{2}$F$_{7/2}$ $\rightarrow ^{2}$F$_{9/2}$ absorption transition of Yb$^{3+}$ at the same excitation wavelength in the Pr, Yb: KPb$_{2}$Cl$_{5}$ sample. The integrated emission intensity of Pr$^{3+}$ in the co-doped sample is nearly 11 times larger relative to Pr$^{3+}$ in the singly doped sample. This suggests that energy transfer between Yb and Pr was successful. [Preview Abstract] |
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GC.00018: Synthesis and Spectroscopic Properties of Neodymium doped Lead Chloride Ei Brown, Uwe Hommerich, Sudhir Trivedi, John Zavada Recently, great attention has been focused on the development of new solid-state laser materials for potential near infrared (NIR) and middle-infrared (MIR) laser applications. Lead halide based materials have recently emerged as new non-hygroscopic laser hosts with low maximum phonon energies. The low-phonon energies lead to small non-radiative decay rates and efficient infrared emission from rare earth dopants. In this work, the crystal growth and infrared spectroscopic properties of Nd doped lead chloride, PbCl$_{2}$, are discussed. Following optical pumping at 753 nm and 808 nm, Nd:PbCl$_{2}$ exhibited several near-infrared emission bands between 800 and 1600 nm as well as a broad MIR emission centered at 5.1$\mu $m ($^{4}$I$_{11/2}\rightarrow ^{4}$I$_{9/2})$. The optical absorption, Judd-Ofelt (JO) parameters, and spontaneous emission probabilities of several Nd$^{3+}$ transitions have been measured and calculated. Based on the JO analysis, the radiative quantum efficiency of the 5.1$\mu $m emission was determined to be $\sim$13{\%}. The peak emission cross-section of 5.1 $\mu $m emission was estimated to be $\sim $0.4x10$^{-20}$cm$^{2}$, which is comparable to the other infrared laser transitions. [Preview Abstract] |
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GC.00019: Magnetic Ordering Temperature Dependence on Dilution in a 3D-XY Ferromagnet G.C. DeFotis, W.M. May, T.M. Owens, R.A. Huddleston, B.R. Rothermel, J.H. Boyle, E.S. Vos, Y. Matsuyama, A.T. Hopkinson The rare 3D-XY insulating ferromagnet Fe(III) bis(diselenocarbamate) chloride has been diluted with diamagnetic Zn(II) bis(dithiocarbamate), to the extent 3.6{\%}, 7.9{\%}, 13.7{\%} and 20.2{\%} in a series of mixtures. Since such magnetic systems are rare, and since the iron material is also a molecular ferromagnet of quite unusual type, the dilution dependence of the ordering characteristics is of considerable interest. Analysis of susceptibility and magnetization data on the several compositions yield the dilution dependence of the magnetic ordering temperature over a fairly broad range of composition. Below 10{\%} dilution the relative decrease in the ordering temperature is much smaller than seen in most dilute systems or in theoretical calculations. At 13.7{\%} dilution the rate of relative decrease of the ordering temperature is much increased, but the ordering temperature itself is only 10.6{\%} below that of the pure system. Near 20{\%} dilution a slight flattening of the ordering temperature vs composition curve appears. Behavior of this general qualitative type has been seen in certain materials previously. But the numerical details of relative variation of ordering temperature with dilution seen here are quite different from prior examples. [Preview Abstract] |
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GC.00020: Electric Field Effects on Quasi 1D Organic Conductor (TMTSF)$_{2}$PF$_{6}$ Eden Steven, Eric Jobiliong, James Brooks We present a study of the behavior of the 1-D organic conductor, (TMTSF)$_{2}$PF$_{6}$, under electric field. We observed a dependence of the conductivity, critical temperature (at which the spin density wave effect occurs, T$_{SDW})$, and magnetoresistance with the applied electric field. The conductance of the sample in the low temperature range (less than T$_{SDW}$ = 12 K) is observed to be increasing with the applied electric field. The T$_{SDW}$ appears to decrease with increasing electric field. The magnetoresistance behavior changes from positive to negative when higher electric field is applied. All these three dependences are ambipolar. [Preview Abstract] |
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GC.00021: SUSY Relics in Ordinary QCD Patrick Keith-Hynes, Harry Thacker Recent work by Armoni, Shifman and Veneziano suggests that in the large N-color limit, N=1 Supersymmetric Yang-Mills Theory (SYM) is equivalent to 1-flavor QCD. In this proposed equivalence the massless gluino sparticle in the adjoint representation of SYM becomes a quark in the antisymmetric representation of 1-flavor QCD, while the gauge field and gauge couplings remain unchanged. One consequence of such an equivalence is that the scalar and pseudoscalar mesons of 1-flavor QCD should have degenerate mass, since they originate within the same Wess-Zumino supermultiplet of SYM. We use previously published lattice results to compare the masses of scalar and pseudoscalar mesons in 1-flavor QCD. We also perform a similar flavor singlet meson mass comparison in the CP(3) model. [Preview Abstract] |
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