Atomic, Molecular and Optical Physics Commons™
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Recent Articles in Atomic, Molecular and Optical Physics
Novel Materials For Use In Homeland Security Research, Jason Osgood Ewen Young 
Western Kentucky University
Novel Materials For Use In Homeland Security Research, Jason Osgood Ewen Young
Masters Theses & Specialist Projects
Organometallic pyridazines and compounds derived from them have been of interest in polymer research due to their atypical environmental stability (as compared to other non-aromatic organic semiconductors) as well as their conductivity. The off-metal synthesis and characterization of several pyridazyl thallium, manganese, and rhenium complexes, beginning with fulvenes 1,2- C5H3(COHR)(COR), are reported here. The diacyl fulvenes were treated with hydrazine hydrate to ring close to pyridazines. Next, the pyridazines were converted to their respective thallium salts through treatment with thallium (I) ethoxide. Lastly, the salts were transmetallated into the respective rhenium or manganese complexes through treatment with ...
Unresolved Question Of The 10he Ground State Resonance, Z. Kohley, J. Snyder, T. Baumann, G. Christian, P.A. DeYoung, J.E. Finck, R.A. Haring-Kaye, M. Jones, E. Lunderberg, B. Luther, S. Mosby, A. Simon, J.K. Smith, A. Spyrou, Sharon Stephenson, M. Thoennessen 
Gettysburg College
Unresolved Question Of The 10he Ground State Resonance, Z. Kohley, J. Snyder, T. Baumann, G. Christian, P.A. Deyoung, J.E. Finck, R.A. Haring-Kaye, M. Jones, E. Lunderberg, B. Luther, S. Mosby, A. Simon, J.K. Smith, A. Spyrou, Sharon Stephenson, M. Thoennessen
Physics and Astronomy Faculty Publications
The group state of 10He was populated using a 2p2n-removal from a 59 MeV/u 14Be beam. The decay energy of the three body system, 8He + n + n, was measured and a resonance was observed at E = 1.60(25) MeV with a 1.8(4) MeV width. This result is in agreement with previous invariant mass spectroscopy measurements, using the 11Li(-p) reaction, but is consistent with recent transfer reaction results. The proposed explanation that the difference, about 500 keV, is due to the effect of the extended halo nature of 11Li in the one-proton ...
Forensic Investigation Of Stamped Markings Using A Large-Chamber Scanning Electron Microscope And Computer Analysis For Depth Determination, Eric Douglas Jones Western Kentucky University
Forensic Investigation Of Stamped Markings Using A Large-Chamber Scanning Electron Microscope And Computer Analysis For Depth Determination, Eric Douglas Jones
Masters Theses & Specialist Projects
All firearms within the United States are required by the Gun Control Act to be physically marked with a serial number; which is at least 0.003” in depth and 1/16” in height. The purpose of a serial number is to make each firearm uniquely identifiable and traceable. Intentional removal of a serial number is a criminal offense and is used to hide the identity and movements of the involved criminal parties. The current standard for firearm serial number restoration is by chemical etching; which is time & labor intensive as well as destructive to the physical evidence (firearm). It is hypothesized that a new technique that is accurate, precise, and time efficient will greatly aid law enforcement agencies in pursuing criminals. This thesis focuses on using a large chamber scanning electron microscope to take secondary electron (SE) images of a stamped metal plate and analyzing them using the MIRA MX 7 UE image processing software for purposes of depth determination. An experimental peak luminance value of 77 (pixel values) was correlated to the known depth (273 μm) at the bottom of the sample character. Results show that it is potentially possible to determine an unknown depth from a SEM image; using luminance values obtained in the MIRA analysis.
Study Of Ultrashort Laser-Pulse Induced Ripples Formed At The Interface Of Silicon-Dioxide On Silicon, Bing Liu 
McMaster University
Study Of Ultrashort Laser-Pulse Induced Ripples Formed At The Interface Of Silicon-Dioxide On Silicon, Bing Liu
Open Access Dissertations and Theses
In this thesis, the ripple formation at the interface of SiO2 and Si were studied in a systematic fashion by irradiating the SiO2-Si samples with ultrashort laser pulses under a broad variety of experimental conditions. They consist of di↵erent irradiating laser wavelengths, incident laser energies, translation speeds, translation directions, spot sizes of the laser beam, as well as oxide thicknesses. The ripples produced by laser irradiation are examined using various microscopy techniques in order to characterize their surface morphology, detailed structures, crystalline properties, and so on. For the experiments carried out at ! = 800 nm, the ripples formed on the ...
Nuclear Magnetic Resonance Studies Of Sodiumaluminohexahydride (Na3alh6), Tim J. Ellis-Caleo 
Washington University in St. Louis
Nuclear Magnetic Resonance Studies Of Sodiumaluminohexahydride (Na3alh6), Tim J. Ellis-Caleo
Undergraduate Research Symposium
Many applications of modern physics require the investigator to understand the behavior of specific atoms in compounds. The behavior and structure of molecules such as sodiumaluminohexahydride (Na3AlH6) is relevant to the field of hydrogen storage [1]. In this study, we used nuclear magnetic resonance to examine the behavior of sodium, aluminum and hydrogen atoms in the compound sodiumaluminohexahydride. Sodiumaluminohexahydride consists of a covalently bonded AlH6 anion that forms an ionic bond with a sodium cation [2]. Particularly, we investigated the atomic motion at various temperatures by looking at the motional averaging of the atoms as a function of temperature from ...
Second Moment Analysis Of Sodium Aluminohexahydride (Na3alh6) Nmr, Tim J. Ellis-Caleo Washington University in St. Louis
Second Moment Analysis Of Sodium Aluminohexahydride (Na3alh6) Nmr, Tim J. Ellis-Caleo
Undergraduate Research Symposium
Sodium aluminohexahydride (Na3AlH6) is a promising candidate for reversible hydrogen storage. Understanding the motion of individual atoms within the crystalline lattice is a key challenge of studying hydrogen storage candidates. This molecule is formed by sodium cations and an aluminohexahydride (AlH6-) anion cluster. We examined the relative widths of the lineshapes over the temperature range 23oC to 240oC and noticed significant narrowing, allowing us to conclude that some of the nuclei are moving. It is important to understand not only which nuclei are moving, but also how they are moving. In this case, second moment calculations can be performed to ...
Investigation Of Optical Dipole Traps For Trapping Neutral Atoms For Quantum Computing, Danielle May 
California Polytechnic State University
Investigation Of Optical Dipole Traps For Trapping Neutral Atoms For Quantum Computing, Danielle May
Physics
No abstract provided.
Balconies, Joe Guimera 
Claremont Colleges
Balconies, Joe Guimera
The STEAM Journal
Recent developments in theoretical physics suggest the possibility of parallel universes. What if we could see two or more universes at the same time? In effect, superimpose a scene from one universe; say a street corner, over the image of the same scene from a second universe? The photograph “Balconies” imagines the possibilities.
Theory Of Model Kohn-Sham Potentials And Its Applications, Alex P. Gaiduk 
Western University
Theory Of Model Kohn-Sham Potentials And Its Applications, Alex P. Gaiduk
Electronic Thesis and Dissertation Repository
The purpose of Kohn-Sham density functional theory is to develop increasingly accurate approximations to the exchange-correlation functional or to the corresponding potential. When one chooses to approximate the potential, the resulting model must be integrable, that is, a functional derivative of some density functional. Non-integrable potentials produce unphysical results such as energies that are not translationally or rotationally invariant. The thesis introduces methods for constructing integrable model potentials, developing properly invariant energy functionals from model potentials, and designing model potentials that yield accurate electronic excitation energies. Integrable potentials can be constructed using powerful analytic integrability conditions derived in this work ...
High-Order-Harmonic-Generation Spectroscopy With An Elliptically Polarized Laser Field, M. V. Frolov, N. L. Manakov, T. S. Sarantseva, Anthony F. Starace 
University of Nebraska - Lincoln
High-Order-Harmonic-Generation Spectroscopy With An Elliptically Polarized Laser Field, M. V. Frolov, N. L. Manakov, T. S. Sarantseva, Anthony F. Starace
Anthony F. Starace Publications
Analytic formulas describing high-order-harmonic generation (HHG) by atoms in an intense laser field with small ellipticity are obtained quantum mechanically in the tunneling limit. The results show that factorization of the HHG yield in terms of an electron wave packet and the photorecombination cross section (PRCS) is valid only for s states of a bound atomic electron, whereas the HHG yield for p states involves two different atomic parameters. For the latter case, elliptic HHG spectroscopy enables one to retrieve both the energy and angular dependence of the PRCS of the target atom, as we illustrate for the case of ...
Leds And Astronomy, Britny N. Delp, Stephen M. Pompea California Polytechnic State University
Leds And Astronomy, Britny N. Delp, Stephen M. Pompea
STEM Teacher and Researcher (STAR) Program Posters
Using a Czerny-Turner spectrometer, 45 different types of outdoor lights were categorized. These spectra were used to determine how useful the light is to human eyes and how dark skies friendly these lights are. Dark skies friendly lighting means that little to no light shines above a right angle to the light, and should emit as little as possible below 500nm (green) wavelengths. The short wavelengths present a problem to astronomers in the form of Rayleigh scattering. The following criterion were used in selecting the best source for urban and rural lighting: color rendition measured by color rendering index (CRI ...
Nonlinear Propagation Of Incoherent White Light In A Photopolymerisable Medium: From Single Self-Trapped Beams To 2-D And 3-D Lattices, Kailash Kasala McMaster University
Nonlinear Propagation Of Incoherent White Light In A Photopolymerisable Medium: From Single Self-Trapped Beams To 2-D And 3-D Lattices, Kailash Kasala
Open Access Dissertations and Theses
Optical beams that travel through a material without undergoing divergence are known as self-trapped beams. Self-trapping occurs when a beam induces a suitable index gradient in the medium that is capable of guiding the original beam. An incoherent light consists of femtosecond scale speckles, due to random phase fluctuations and were not thought to self-trap until recently. In 1997, Mitchell et al., showed that white light can self-trap, provided the medium cannot respond fast enough to form index gradients to these speckles individually. However, detailed studies have been hampered by a lack of suitable materials and strategies for enabling such ...
Steady State And Dynamical Properties Of An Impurity In A Bec In A Double Well Potential, Jesse D. Mumford McMaster University
Steady State And Dynamical Properties Of An Impurity In A Bec In A Double Well Potential, Jesse D. Mumford
Open Access Dissertations and Theses
The subject of this work is the theoretical analysis of the mean-field and many-body properties of an impurity in a Bose-Einstein condensate in a double well potential. By investigating the stationary mean-field properties we show that a critical value of the boson-impurity interaction energy, Wc, corresponds to a pitchfork bifurcation in the number difference variable in the mean-field theory. Comparing Wc to the value of W where the many-body ground state wave function begins to split shows a direct correlation signaling a connection between the many-body and mean-field theories. Investigation of the mean-field dynamics shows that chaos emerges ...
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Optical Modeling Of Schematic Eyes And The Ophthalmic Applications
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