Search Constraints

Start Over
Filtering by: Has journal New Journal of Physics Remove constraint Has journal: New Journal of Physics Degree Field Physics Remove constraint Degree Field: Physics Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

Search Results

  • Effects of coupled atomic states on the resonance scattering of radiation

    Creator:
    Srivastava, Rajendra Prasad
    Abstract:
    The excitation and decay probabilities for resonance scattering of radiation from an atom with two coupled excited states and one ground state in an external static field are calculated as a function of time and frequency. Various oscillatory behaviors are found in all the probabilities. These oscillations depend on the...
    Resource Type:
    Dissertation
    Full Text:
    PHILOSOPHY in (Name of student) (Degree) Physics (Major) presented on 7;Z Date) TITLE: EFFECTS OF

  • Atomic ejection in the single crystal sputtering of nickel with 40-600 eV argon ions

    Creator:
    Leung, Yee Kit
    Abstract:
    A threestage, differentially pumped ion accelerator is used to produce low energy argon ions, which in turn, are used to bombard the surfaces of plane nickel single crystals. Nickel atoms ejected from the crystals are counted using the radioac tive tracing method. From the analysis of the angular distri butions...
    Resource Type:
    Dissertation
    Full Text:
    Philosophy in Physics presented on (6 , 19711 Title: ATOMIC EJECTION IN THE SINGLE CRYSTAL SPUTTERING OF

  • Perturbed directional correlation in Ta-181

    Creator:
    Sommerfeldt, Raymond Walter
    Abstract:
    The effect of a static quadrupole interaction on the 133-482 Kev gamma-gamma angular correlation in Ta-181 has been studied by the delayed coincidence method. Using a source of Hf-181 in polycrystalline hafnium metal, the anisotropy was measured as a function of time between the formation and decay of the 482...
    Resource Type:
    Dissertation
    Full Text:
    OF THE THESIS OF Raymond Walter Sommerfeldt for the Ph. D. in Physics (Name) (Degree) (Major

  • Sensemaking Throughout the Physics Curriculum: Understanding Expert and Student Ideas About Sensemaking in a Physics Context

    Creator:
    Lenz, MacKenzie
    Abstract:
    Physics sensemaking is a growing topic of study within the physics education community. Many lenses have been used to study sensemaking but few have considered how time and instruction can impact student sensemaking practices and ideas. In this dissertation, I present four studies that address four major questions: What sensemaking...
    Resource Type:
    Dissertation
    Full Text:
    concept in a new way, are examples of sensemaking. Sensemaking has been studied within the physics

  • Model of student understanding of probability in modern physics

    Creator:
    Wattanakasiwich, Pornrat
    Abstract:
    This study aimed to investigate students' models of probability in a modern physics context. The study was divided into three phases. The first phase explored student pre-knowledge about probability before modem physics instruction. The second phase investigated student understanding of concepts related to probability such as wave-particle behavior, the uncertainty...
    Resource Type:
    Dissertation
    Full Text:
    the degree of Doctor of Philosophy in Physics presented on April 28. 2005. Title: Model of Student

  • Students' Understanding of Complex Numbers in Middle-Division Physics

    Creator:
    Smith, Emily M.
    Abstract:
    Mathematical sophistication increases rapidly as students transition from lower- to upper-division physics courses. Complex algebra is one of the mathematical tools that is not introduced or used in lower-division physics courses but is pervasive throughout upper-division courses. In this dissertation, I study middle-division physics students' developing fluency with complex number...
    Resource Type:
    Dissertation
    Full Text:
    degree of Doctor of Philosophy in Physics presented on June 9, 2016. Title: Students’ Understanding of

  • Unusual quantum effects in scattering wave functions of two-dimensional cage potentials

    Creator:
    Rowe, Kirk, 1966-
    Abstract:
    We exhibit long-lived resonances in scattering from two-dimensional soft cage potentials comprised of three and four Gaussian peaks. Specific low-energy resonances with very narrow width are shown to correspond to classical multiple-reflection events. These states have much larger probability densities inside the cage than outside and mimic bound states in...
    Resource Type:
    Dissertation
    Full Text:
    of Doctor of Philosophy in Physics presented on December 9, 2004. Title: Unusual Quantum Effects in

  • Supporting Learning and Thinking with Multiple Representations in Upper Division Physics Courses

    Creator:
    Alfson, Jonathan W.
    Abstract:
    Physicists solve problems and communicate their work using many external representations, such as equations, words, diagrams, graphs, sketches, pictures, and more. To learn physics, then, students must learn to use external representations. In this dissertation, I present three manuscripts. Each manuscript discusses how upper-division Paradigms in Physics students use multiple...
    Resource Type:
    Dissertation
    Full Text:
    for the degree of Doctor of Philosophy in Physics presented on June 9, 2023. Title: Supporting

  • A new technique for high performance tandem time-of-flight mass spectrometry

    Creator:
    Katz, Daniel Louis
    Abstract:
    The main result of this written dissertation is a mathematical solution to the problem of multiplex recording for high performance tandem time-of-flight mass spectrometry. The prescription is to use a time-lag accelerator in the second stage to match the ion optical properties of the decay fragments to the requirements of...
    Resource Type:
    Dissertation
    Full Text:
    for the degree of Doctor of Philosophy in Physics presented on November 17, 2000. Title: A New

  • The optical properties of multi-scale plasmonic structures and their applications in optical characterization and imaging

    Creator:
    Kuhta, Nicholas Anthony
    Abstract:
    The optical response of metallic structures is dominated by the dynamics of their free electron plasma. Plasmonics, the area of optics specializing in the electromagnetic behavior of heterogeneous structures with metallic inclusions, is undergoing rapid development, fueled in part by recent progress in experimental fabrication techniques and novel theoretical approaches....
    Resource Type:
    Dissertation
    Full Text:
    of Doctor of Philosophy in Physics presented on July 9, 2012. Title: The Optical Properties of