Now showing items 21-32 of 32

    • Gas Discharge Lamps – A Requiem 

      Lister, Graeme (2018-04-27)
      Almost a century has passed since the introduction into the market of gas discharge lamps for general lighting in the form of fluorescent lamps, made possible by the discovery of phosphors able to convert ultra-violet (UV) ...
    • Jim Lawler's Science: Above and Below the H-Line 

      Walker, Thad G. (2018-04-27)
      This presentation gives an overview of Jim Lawler's career, focusing on a few of his important contributions to science.
    • How I Became a Non-Chemist 

      Menningen, Ken (2018-04-27)
      Some scientists direct their careers with laser focus to answer a small set of questions. Others wander around like a trapped photon. I will tell the story about how a plasma physicist ended up studying combustion chemistry, ...
    • From nonlocal electrons to delocalized electrons and artificial atoms 

      Kortshagen, Uwe (2018-04-27)
      After spending a portion of his career on nonlocal electron kinetics in plasmas, the speaker entered a new phase of his career with plasma materials synthesis. The talk will discuss how plasmas can be used to synthesize, ...
    • Six Lines to Tell a Story 

      Wood, Michael (2018-04-27)
      In this talk, I will highlight a recently completed investigation into a challenge brought against our earlier work on vanadium. The discrepancy between six transition probabilities and its resolution touches on several ...
    • The astrophysical r-process: what we are learning from gravitational waves, dwarf galaxies, and stellar archaeology 

      Roederer, Ian (2018-04-27)
      Understanding the origin of the elements is one of the major challenges of modern astrophysics. The rapid neutron-capture process, or r-process, is one of the fundamental ways that stars produce the elements listed along ...
    • A Fresh Look at Abundances of Iron-group Elements in Very Metal-Poor Stars 

      Sneden, Chris (2018-04-27)
      Studies of very metal-poor stars have focused attention on the neutron-capture (Z > 30) elements, whose dramatic star-to-star variations give us insights to element production in extreme, explosive nucleosynthesis environments. ...
    • Spectroscopic study of the 7p J=1/2 and 7p J=3/2 states in neutral cesium-133 

      Herd, Maria-Teresa (2018-04-27)
      I will start with a few observations of connections between spectroscopy and other (seemingly unrelated) research topics, then focus on Doppler free spectroscopy on the 7p J=1/2 and 7p J=3/2 states in neutral cesium-133. ...
    • UW Laboratory Astrophysics 

      DenHartog, Elizabeth (2018-04-27)
      In this talk I will describe the laboratory astrophysics program of the Jim Lawler group at the University of Wisconsin – Madison, focusing on the laboratory techniques and instruments used for the measurement of transition ...
    • High energy density plasma simulations using ultracold neutral plasmas 

      Bergeson, Scott (2018-04-27)
      Strongly-coupled Coulomb systems are typically fluid-like plasmas characterized by the ratio of the nearest-neighbor electrical potential energy to the average kinetic energy. When this ratio is near unity, the plasmas are ...
    • Measurements of branching fractions using Fourier transform and grating spectroscopy 

      Nave, Gillian (2018-04-30)
      The measurement of lifetimes using laser-induced fluorescence at the University of Wisconsin-Madison has been one of the most productive experiments in the measurement of atomic spectroscopic data. The NIST bibliographic ...
    • Downstream hydrogen plasma cleaning for mass metrology at NIST 

      Benck, Eric (2018-06-01)
      On International Metrology Day, May 20, 2019, the redefinition of the International System of Units (SI) is scheduled to be implemented. When this occurs the kilogram, the last remaining unit defined by a physical artifact, ...