Bulletin of the American Physical Society
Spring 2011 Meeting Ohio-Region Section of the APS
Volume 56, Number 3
Friday–Saturday, April 15–16, 2011; University Heights, Ohio
Session D4: Education and Society; Nuclear, Plasma and Chemical Physics; Astrophysics |
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Chair: Ulrich Zurcher, Cleveland State University Room: Dolan Science Center E116 |
Saturday, April 16, 2011 8:10AM - 8:22AM |
D4.00001: Letters to the editor of the local paper: A scientific responsibility Gordon Aubrecht Our local papers often contain, from the point of view of the scientist, strange letters to the editor. As part of our duty to fellow citizens, we need to take the opportunity the bad science in the letters proffers to try to explain the scientific view to readers. In many cases, the letter writers minds are already made up; however, other readers whose heads may nod in agreement to the original letter may become more informed and change their ideas in response. I will describe some of my experiences in trying to meet this responsibility. [Preview Abstract] |
Saturday, April 16, 2011 8:22AM - 8:34AM |
D4.00002: Online/Distance Learning Laser Optics course Kausar Yasmin Use of Virtual Lab to offer an upper division Laser Optics course via distance learning/online will be presented. Latest topics and technology will be introduced. [Preview Abstract] |
Saturday, April 16, 2011 8:34AM - 8:46AM |
D4.00003: A desktop-computer simulation for exploring the fission barrier Cameron Reed A simple model of a fissioning nucleus that splits symmetrically both axially and equatorially is used to show how one can predict the presence of a fission barrier of several tens of MeV for nuclides of mass number $A \quad \sim $ 90 and of $\sim $ 10 MeV for heavy elements such as uranium. Despite its simplicity, the model reproduces the general behavior of the run of fission barrier height as a function of nuclear mass number as revealed by much more sophisticated models. It intuitive appeal and tractability make it suitable for presentation in a sophomore-level Modern Physics class. [Preview Abstract] |
Saturday, April 16, 2011 8:46AM - 8:58AM |
D4.00004: Potential Energy Surfaces and Derivative Coupling Terms for M + Ng, M = K, Rb, Cs, and Ng = He, Ne, Ar David Weeks, Lachlan Belcher, L. Blank, Gary Kedziora Potential energy surfaces and derivative coupling terms are computed for M + Ng, (M = K, Rb, Cs and Ng = He, Ne, Ar). These surfaces will be used to study pressure broadening of the D1 and D2 atomic lines. They will also be used in wave packet studies to investigate non-radiative fine structure transition rates. Both pressure broadening and the fine structure transition rates play an important role in the operation of optically pumped alkali lasers. [Preview Abstract] |
Saturday, April 16, 2011 8:58AM - 9:10AM |
D4.00005: Liquid Metallic Hydrogen: Building Block of a Liquid Sun Pierre-Marie Robitaille The establishment by Andrews of critical temperatures (T. Andrews, Phil. Trans. 1869, v. 159, 575-590) soon became one of the great pillars in support of the gaseous models of the Sun. Gases above these temperatures simply could not be liquefied. Given that interior of the Sun was already hypothesized in the 19th century to be at temperatures well exceeding those achievable on Earth in ordinary furnaces, it became inconceivable to think of the solar interior as anything but gaseous. Hence, the models advanced by Secchi, Faye, Stoney, Lane, and Young, could easily gain acceptance. However, modern science is beginning to demonstrate that hydrogen (which under ordinary conditions has a critical point at $\sim $33 K) can become pressure ionized such that its electrons enter metallic conductions bands, given sufficiently elevated pressures, as the band gap is reduced from 15 eV to $\sim $0.3 eV. Liquid metallic hydrogen will possess a new critical temperature well above that of ordinary hydrogen. Already, experiments suggests that it can exist at temperatures of thousands of Kelvin and millions of atmospheres (S. T. Weir et al., Phys. Rev. Let. 1996, 76, 1860). The formation of liquid metallic hydrogen brings with it \underline {a new candidate for the interior of the Sun} and the stars. Its existence shatters the great pillar of the \underline {gaseous models of the Sun} which the critical point of ordinary gases had erected. [Preview Abstract] |
Saturday, April 16, 2011 9:10AM - 9:22AM |
D4.00006: Characterization of thin film deposition processes in RF and DC sputtering using optical emission spectroscopy Amruta Nawarange, Hasitha Mahabaduge, Kristopher Wieland, Alvin Compaan We have used optical emission spectroscopy (OES) to understand sputtering processes when a Cu target is sputtered with RF or DC power. The plasma signal was collected through a quartz window of the chamber and fed through an optical fiber to a diode-array spectrometer with grating of 150grooves/mm. When the plasma is generated using DC power, the optical emission signal shows several prominent lines mostly corresponding to Cu I transitions whereas in case of RF, the plasma shows several lines corresponding to both Ar I and Cu I transitions. The sputtering rate is also found to be higher in the case of DC power. Further analysis of OES data will help us to understand these processes in planar magnetron sputtering. We will discuss these processes in detail for different target materials (Cu, Cr. Mo) and at different pressure, and power and relate these changes to excitation mechanisms in the sputtering plasma. [Preview Abstract] |
Saturday, April 16, 2011 9:22AM - 9:34AM |
D4.00007: Center of the Universe Located by Triangulation of NASA Data Charles Sven The Very Well Scrubbed NASA's seven year accumulation of CMB Data~is not homogeneous, but has a unique geography.~~~NASA's overall results have remained the same noting that every CMB point is unchanging; the composite~study is like a unique fingerprint.~ As a result of this work, each point on the~CMB sphere can be catalogued; characteristics and coordinates noted. ~With~this information in hand one may use these points in locating earth~vis-\`{a}-vis the~technique of triangulation.~ [Preview Abstract] |
Saturday, April 16, 2011 9:34AM - 9:46AM |
D4.00008: Mathematical Description of the Composition of Universe Han Yongquan Gravity acceleration is the root of universe change. The relationship between gravity acceleration and mass, time, velocity and space is as follows: when the gravitational acceleration reaches maximum, mass, time, velocity and space are zero and the universe reaches minimum; when the gravitational acceleration reaches minimum, mass, time, velocity and space reach maximum and the universe reaches maximum. Its mathematical C=$j^4\left( {t\times k\times v\times m} \right)$,C is cosmological constant; j is gravity acceleration; t is time; k is the space; v is velocity; m is mass. When the gravity acceleration shifts from big to small, the universe is in the period of development and expansion; when the gravity acceleration shifts from small to big, the universe becomes on the wane and then dies out. It can be further inferred that when the velocity is zero, mass, time and space are also zero. In the analysis of C=$j^4\left( {t\times k\times v\times m} \right)$, time constant$c_t =j\times t_{; }$ space constant$k_t =j\times k_{; }$velocity constant$c_v =j\times v_{; }$ mass constant $c_m =j\times m$. The multiply of four constants is cosmological change constant. The formula expressing certain state of changing universe space is$\frac{C}{j^4}$. In international standard units, the unit for changing universe space is m $^{4}$ $\times$ kglinear TEL: 13241375685 [Preview Abstract] |
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