Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Publication Type
Articles 1 - 10 of 10
Full-Text Articles in Physical Sciences and Mathematics
Single Muon Production And Implications For Charm In √Sn N = 200 Gev Au+Au Collisions, Andrew Miles Glenn
Single Muon Production And Implications For Charm In √Sn N = 200 Gev Au+Au Collisions, Andrew Miles Glenn
Doctoral Dissertations
The PHENIX experiment, located at the Brookhaven National Laboratory’s Rela- tivistic Heavy Ion Collider, is designed to study high energy proton+proton and nu- cleus+nucleus collisions in order to characterize hot and dense nuclear matter. This dissertation presents the first analysis of single muon production in √sN N = 200 GeV Au+Au reactions. Implications of the forward rapidity measurements for charm pro- duction are discussed. Motivation for charm production measurements and the role of open charm in characterizing the medium created in relativistic heavy ion collisions are presented, and the importance of measurements at forward rapidity is established. The results of …
Metallic Ferroelectricity And Superconductivity In The Transition Metal Oxide Pyrochlore Cd2Re2O7, Jian He
Metallic Ferroelectricity And Superconductivity In The Transition Metal Oxide Pyrochlore Cd2Re2O7, Jian He
Doctoral Dissertations
Single crystalline samples of transition metal oxide Cd2Re2O7, the first superconductor among pyrochlore oxides with general formula A2B2O7 and the first example of “ferroelectric metal” theoretically proposed by P.W. Anderson and E.I. Blount back in 1960s, have been grown using vapor transport and carefully characterized, regarding its chemical stoichiometry and structure. In addition to the superconductivity transition, two normal state phase transitions and the anomalous high temperature phase have been comprehensively investigated, by means of transport, thermodynamic and spectroscopy techniques. The system undergoes a subtle continuous cubic-to-tetragonal phase transition …
Fundamental Investigations And Analysis Of Chiral Matter Using Simple Spectroscopic Techniques, Rodney Jamel Sullivan
Fundamental Investigations And Analysis Of Chiral Matter Using Simple Spectroscopic Techniques, Rodney Jamel Sullivan
Doctoral Dissertations
Fundamental investigations of circular dichroism were performed on (R)-(+)-3- methylcyclopentanone, (R)-(-)-2-butylamine, and (S)-(+)-2-butylamine in the liquid and vapor phase to show that solvents often have a structure-masking effect on the circular dichroism for a given molecule. Also, the solid state circular dichroism of cubic sodium chlorate crystals was successfully measured in the midst of adverse experimental circumstances. With these single photon circular dichroism studies at hand, a new technique for measuring circular dichroism was introduced for an advanced investigation of (R)-(+)-3-methylcyclopentanone. The resonance enhanced multiphoton ionization of (R)-(+)-3-methylcyclopentanone was performed …
Understanding The Dynamics Of Molecular Solids, Roman Wesolowski
Understanding The Dynamics Of Molecular Solids, Roman Wesolowski
Masters Theses
Superconductors, single-molecule magnets, and spin-ladders materials are at the center of interest in condensed matter science. All of these materials have incredibly important potential applications and their exploration is the key to the future technologies. We carried out various measurements on representative compounds of each group of interest. The main tool for all these projects was optical spectroscopy, varied in each case to apply magnetic field or change temperature. In our magneto-optical measurements of κ-(ET)2Cu[N(CN)2]Br and κ-(ET)2Cu[N(CN)2]Cl, we sought to understand correlations between intramolecular vibrations and superconductivity. We found several …
Analysis Of Reflected Spectral Signatures And Detection Of Geophysical Disturbance Using Hyperspectral Imagery, Forrest Mccoy Hoffman
Analysis Of Reflected Spectral Signatures And Detection Of Geophysical Disturbance Using Hyperspectral Imagery, Forrest Mccoy Hoffman
Masters Theses
Geophysical disturbances resulting from human activities often have significant
consequences for plants and animals, and even for entire ecosystems.Disturbances resulting from petroleum exploration and production activities can have long term impacts on soils, watersheds, rivers and lakes, vegetation, wildlife, and humans. These anthropogenic disturbances are frequently the result of hydrocarbon (oil) or produced water (brine) spills. Brine is usually produced simultaneously with oil or gas. The ability to detect brine spills with remote sensing techniques would be valuable to petroleum companies and industry regulators. The objectives of this research were to 1) determine if brine spills could be detected spectroscopically, …
Low Energy Excitations In Spin Clusters And Molecular Solids, Jason Thomas Haraldsen
Low Energy Excitations In Spin Clusters And Molecular Solids, Jason Thomas Haraldsen
Masters Theses
This thesis investigates low energy magnetic and vibrational excitations in molecular solids. Analytical and numerical studies of these two types of excitations, both in idealized systems and in more complicated models that are thought to capture the relevant physics of several materials. The materials considered include molecular magnets and layered organic superconductors and semiconductors. Our results include exact expressions for certain magnetic observables, neutron scattering structure factors for small spin 1/2 clusters, studies of the molecular dynamics of Fe8Br8 molecular magnet, the e®ects of symmetry breaking in (DT-TTF)2Au(mnt)2 spin ladder candidate, and the importance …
Cross Sections Fall 2004, Department Of Physics And Astronomy
Cross Sections Fall 2004, Department Of Physics And Astronomy
Cross Sections
No abstract provided.
Spectroscopy Using Short-Path Surface Plasmon Dispersion, Philip Ryan Boudreaux
Spectroscopy Using Short-Path Surface Plasmon Dispersion, Philip Ryan Boudreaux
Masters Theses
A miniature surface-plasmon based spectrometer is presented for both the near zone and the far zone. In the near zone four different experiments have been completed with this system. It will be shown that with 632, 614, 543, and 440 nm incident lasers upon the system there is good agreement between experimental and theoretical transmission spectra. This system is shown to provide transmission spectra of different broad band-pass, glass filters across the visible wavelength range with high stray-light rejection at low resolution. These spectra are compared to those taken with a commercial spectrophotometer. Spectra of solutions of the laser dye …
Alpha And Gamma-Ray Spectroscopic Studies Of Au, Pt, And Ir Nuclei Near The Proton Dripline, Tuck-Meng Goon
Alpha And Gamma-Ray Spectroscopic Studies Of Au, Pt, And Ir Nuclei Near The Proton Dripline, Tuck-Meng Goon
Doctoral Dissertations
This dissertation reports the observation of α-decay and in-beam level structures in the neutron-deficient nuclei 176,174Au, 173,174Pt, and 175Ir from an experiment which was performed at Argonne National Laboratory (ANL). A beam of 84Sr projectiles was used to bombard 92,94,96Mo targets. From these reactions, the 176,178,180Hg compound nuclei were made which eventually decayed into more than 20 product nuclei. The experiment was performed with the Atlas accelerator and utilized the Gammasphere array at the target position in conjunction with the Fragment Mass Analyzer (FMA) for mass identification and a Double-Sided Silicon Strip Detector (DSSD), …
Cross Sections Spring 2004, Department Of Physics And Astronomy
Cross Sections Spring 2004, Department Of Physics And Astronomy
Cross Sections
No abstract provided.