Bulletin of the American Physical Society
2007 Joint Spring Meeting of the Texas Sections of APS, AAPT, and SPS
Volume 52, Number 2
Thursday–Saturday, March 22–24, 2007; Abilene, Texas
Session SPS3: SPS III - Student Research |
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Chair: Shon Watson, Abilene Christian University Room: Foster Science Building 458 |
Saturday, March 24, 2007 10:40AM - 10:52AM |
SPS3.00001: Study of the CMS Combined Calorimeter Response to Low Energy Electron and Pion Beams and Pion Beams Nicholas Murray, Sung-Won Lee We present the combined response of the CMS calorimeters to low energy charged particle beams of electrons and pions with momenta down to 2 GeV/c. The data were taken at the H2 beamline at CERN in 2006. The effects of electromagnetic calorimeter on the linearity of the combined calorimeter systems is also studied. [Preview Abstract] |
Saturday, March 24, 2007 10:52AM - 11:04AM |
SPS3.00002: Simulation of (-)Pion-Proton$\rightarrow$(0)Kaon-Lamda Reaction in the Region of the N*(1710) Resonance Joseph Kish The N*(1710) (-)Pion-Proton$\rightarrow$(0)Kaon-Lamda resonance is a poorly defined excited state of the nucleon. Current data are outdated and various partial wave analyses do not agree very well. In order to gain a greater understanding of the N*(1710) resonance a collaboration was formed between Petersburg Nuclear Physics Institute (PNPI), Institute for Theoretical and Experimental Physics (ITEP), and Abilene Christian University (ACU). This experiment, called EPECUR, expects to resolve several uncertainties regarding the N*(1710)'s existence, mass, width, and branching fractions. The experiment is scheduled to run during the summer of 2008. In preparation, ACU is simulating the experiment utilizing the GEANT4 simulation package and analyzing the data with ROOT and MINUIT. Recent improvements to an algorithm for event reconstruction have increased the percentage of correctly identified events in the (-)Pion-Proton$\rightarrow$(0)Kaon-Lamda reaction from $\sim$60\% to over 90\%. These improvements as well as proposed future modifications will be discussed. [Preview Abstract] |
Saturday, March 24, 2007 11:04AM - 11:16AM |
SPS3.00003: Rayleigh-Ritz approximation for the ground state energy for a particle in a semicircular well Lynch Morgan, Bixler David Approximation schemes for bound state energies are of immense importance in quantum mechanics. Typically one finds these desired energies using the ``particle in a box'' or the simple harmonic oscillator potentials. Methods other than obtaining closed form solutions have been used to determine bound state energies such as time independent perturbation theory, the WKB approximation, and the Rayleigh-Ritz approximation. We shall demonstrate the way one can obtain an approximate ground state energy for a particle in a semicircular potential well using the Rayleigh-Ritz approximation. [Preview Abstract] |
Saturday, March 24, 2007 11:16AM - 11:28AM |
SPS3.00004: Visualization of DNA-Protein Complexes using Atomic Force Microscopy Natalia Guevara, Juan Atkinson Nowadays, it's been given increased attention to biological molecules, such as proteins in our bodies and DNA, because of their structural features, physical properties and interactions with other molecules, when viewed as nano-structures. In our research we focus our attention on DNA-Low Density Lipoprotein (LDL) interactions and different ways of visualizing these complexes and characterize their physical properties using Atomic Force Microscopy (AFM) as our main tool. The final purpose of this analysis is to identify specific interactions among LDL's and DNA that may help us unveil the possibility of using these LDL-DNA complexes as natural vectors for gene expression. [Preview Abstract] |
Saturday, March 24, 2007 11:28AM - 11:40AM |
SPS3.00005: Near Infrared Noninvasive Optical Imaging on an object hidden in a chicken breast Elaine Tennant, Wilhelmus Geerts, Zvi Yaniv, Donald Schropp Non-invasive optical imaging by speckle ensemble (NOISE) is a technique for taking an image of an object while it is embedded between two scattering mediums. These mediums can be anything from smoke to frosted glass to biological tissue. The images taken of the object are speckled because of the scattering of the light by the medium surrounding the object. In order to reduce the effect of the scattering we have taken multiple images from different direction using a multi lens array. After running an algorithm that averages all the images together, the scattering has been compensated for and the object becomes obvious. These methods have applications in medical, military and even law enforcement fields. Human tissue is an appropriate scattering medium and has an added benefit of being partially transparent to light in the near infrared spectrum. This property can be exploited for medical purposes. We have built a NOISE setup at our University that works in the infrared and have used it to study a binary object embedded in two centimeters of chicken breast (used to simulate human tissue). An average of one hundred separate speckle images was taken to extract a clear picture of the object. Images were also taken with different scattering mediums. These preliminary results as well as the constructed setup will be discussed. [Preview Abstract] |
Saturday, March 24, 2007 11:40AM - 11:52AM |
SPS3.00006: Impact of RCA clean on hafnium dielectrics Kelly Freeman, Eric Osei-Yiadom, Muhammad Hussain In order to improve the quality of hafnium dielectrics the issue of oxygen vacancies needs to be addressed. The goal of this experiment is to create a model of oxygen incorporation using RCA cleaning. We will present preliminary results of the impact of RCA clean on oxygen levels at the interface of HfO2 films on Si and also HfSiO films on Si. Analysis was completed using x-ray photo spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) under the guidance of engineers at SEMATECH and the Advanced Technology Development Facility (ATDF). Future goals and variations of the ongoing experiment will be discussed as well as the use of Hf in future production of MOSFETs. [Preview Abstract] |
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