Faculty publications from the Physics and Astronomy Department at Gettysburg College.

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2024

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Emergent AI, Jillian A. Bick

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Cybernetics: How It Compares to Science-fiction and Future Possibilities, Anindo Majumder

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Extraterrestrial Life: The Possibility of a Human-Alien Interaction, Ariana M. Piscoya

2022

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3D Flow Field Measurements Outside Nanopores, Jeffrey Mc Hugh, Alice L. Thorneywork, Kurt Andresen, and Ulrich F. Keyser

2021

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Measurements of the 5D∘4−5P3 Transition of Singly Ionized Atomic Iodine Using Intermodulated Laser Induced Fluorescence, Matthew J. Lazo, Thomas E. Steinberger, Timothy N. Good, and Earl E. Scime

2020

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Evidence for Electron Energization Accompanying Spontaneous Formation of Ion Acceleration Regions in Expanding Plasmas, Evan M. Aguirre, Rikard Bodin, Neng Yin, Timothy N. Good, and Earl E. Scime

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Testing a Thermodynamic Approach to Collective Animal Behavior in Laboratory Fish Schools, Julia A. Giannini and James G. Puckett

Pair Formation in Insect Swarms Driven by Adaptive Long-Range Interactions, Dan Gorbonos, James G. Puckett, Kasper van der Vaart, Michael Sinhuber, Nicholas T. Ouellette, and Nir S. Gov

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Similarities Between Insect Swarms and Isothermal Globular Clusters, Dan Gorbonos, Kasper van der Vaart, Michael Sinhuber, James G. Puckett, Andrew M. Reynolds, Nicholas T. Ouellette, and Nir S. Gov

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Additive Modulation of DNA-DNA Interactions by Interstitial Ions, Wei Meng, Raju Timsina, Abby Bull, Kurt Andresen, and Xiangyun Qiu

2019

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Lorentz and CPT Tests Using Penning Traps, Yunhua Ding

Astronomy, 2020, Laurence A. Marschall

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Milky Way Morphology, Laurence A. Marschall

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The Limited Reign of Saturn's Rings, Laurence A. Marschall

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Three-Dimensional Time-Resolved Trajectories from Laboratory Insect Swarms, Michael Sinhuber, Kasper van der Vaart, Rui Ni, James G. Puckett, Douglas H. Kelley, and Nicholas T. Ouellette

2018

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Ion Beams in Multi-Species Plasma, Evan M. Aguirre, Earl E. Scime, and Timothy N. Good

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Slotted Rotatable Target Assembley and Systematic Error Analysis for a Search for Long Range Spin Dependent Interactions from Exotic Vector Boson Exchange Using Neutron Spin Rotation, C. Haddock, Bret E. Crawford, W. Fox, I. Francis, A. T. Holley, Scott W. Magers, M. Sarsour, W. M. Snow, and J. Vanderwerp

Astronomy, 2019, Laurence A. Marschall

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The Continuing Quest for Missile Defense: When Lofty Goals Confront Reality, Peter J. Pella

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Collective Gradient Sensing in Fish Schools, James G. Puckett, Aawaz R. Pokhrel, and Julia A. Giannini

2017

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Spatial Structure of Ion Beams in an Expanding Plasma, Evan M. Aguirre, Earl E. Scime, Derek S. Thompson, and Timothy N. Good

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Photoelastic Force Measurements in Granular Materials, Karen E. Daniels, Jonathan E. Kollmer, and James G. Puckett

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Neutron-Unbound Excited States of 23N, M. Jones, T. Baumann, J. Brett, J. Bullaro, P. A. DeYoung, J.E. Finck, N. Frank, K. Hammerton, J. Hinnefeld, Z. Kohley, A. N. Kuchera, J. Pereira, A. Rabeh, J. K. Smith, A. Spyrou, Sharon L. Stephenson, K. Stiefel, M. Tuttle-Timm, R. G.T. Zegers, and M. Thoennessen

Astronomy, 2018, Laurence A. Marschall

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Catching Shadow Bands, Laurence A. Marschall

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The Impact of Base Stacking on the Conformations and Electrostatics of Single-Stranded DNA, Alex Plumridge, Steve P. Meisburger, Kurt Andresen, and Lois Pollack

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On Marie Curie and Me, Sharon L. Stephenson

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Confocal Laser Induced Fluorescence with Comparable Spatial Localization to the Conventional Method, Derek S. Thompson, Miguel F. Henriquez, Earl E. Scime, and Timothy N. Good

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Differential Uptake of Gold Nanoparticles by 2 Species of Tadpole, the Wood Frog (Lithobates Sylvaticus) and the Bullfrog (Lithobates Catesbeianus), Lucas B. Thompson, Gerardo L.F. Carfagno, Kurt Andresen, Andrea J. Sitton, Taylor B. Bury, Laura L. Lee, Kevin T. Lerner, and Peter P. Fong

2016

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Back Half of the Year, Ian R. Clarke

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Living in the Milky Way, Ian R. Clarke

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Long-Range Acoustic Interactions in Insect Swarms: An Adaptive Gravity Model, Dan Gorbonos, Reuven Ianconescu, James G. Puckett, Rui Ni, Nicholas T. Ouellette, and Nir S. Gov

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Search for 4n Contributions in the Reaction 14Be(CH2,X)10He, Michael D. Jones, Zack Kohley, Thomas J. Baumann, Greg Christian, Paul A. DeYoung, Joseph E. Finck, Nathan H. Frank, Robert A. Haring-Kaye, A. N. Kuchera, Bryan A. Luther, Shea Mosby, Jenna K. Smith, J. Snyder, Artemis Spyrou, Sharon L. Stephenson, and Michael R. Thoennessen

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Evolution of Network Architecture in a Granular Material Under Compression, Lia Papadopoulous, James G. Puckett, Karen E. Daniels, and Danielle S. Bassett

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The Midlife Crisis of the Nuclear Nonproliferation Treaty, Peter J. Pella

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Neutron Correlations in the Decay of the First Excited State of 11Li, Jenna K. Smith, Thomas J. Baumann, Daniel Bazin, James Brown, Paul A. DeYoung, Nathan H. Frank, Michael D. Jones, Zack Kohley, Bryan A. Luther, B. S. Marks, Artemis Spyrou, Sharon L. Stephenson, Michael R. Thoennessen, and Alexander S. Volya

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A Three-Fold Approach to the Heat Equation: Data, Modeling, Numerics, Kimberly R. Spayd and James G. Puckett

2015

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Two-Neutron Sequential Decay of 24O, M. D. Jones, N. Frank, T. Baumann, J. Brett, J. Bullaro, P. A. DeYoung, J.E. Finck, K. Hammerton, J. Hinnefeld, Z. Kohley, A. N. Kuchera, J. Pereira, A. Rabeh, W. F. Rogers, J. K. Smith, A. Spyrou, Sharon L. Stephenson, K. Stiefel, M. Tuttle-Timm, R. G.T. Zegers, and M. Thoennessen

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Further Insights into the Reaction Be14(CH2,X)10He, M. D. Jones, Z. Kohley, T. Baumann, G. Christian, P. A. DeYoung, J. E. Finck, N. Frank, R. A. Haring-Kaye, A. N. Kuchera, B. Luther, S. Mosby, J. K. Smith, J. Snyder, A. Spyrou, Sharon L. Stephenson, and M. Thoennessen

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Population of 13Be in a Nucleon Exchange Reaction, B. R. Marks, P. A. DeYoung, J. K. Smith, T. Baumann, J. Brown, N. Frank, J. Hinnefeld, M. Hoffman, M. D. Jones, Z. Kohley, A. N. Kuchera, B. Luther, A. Spyrou, Sharon L. Stephenson, C. Sullivan, M. Thoennessen, N. Viscariello, and S. J. Williams

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Precise Mass and Radius Measurements for the Components of the Bright Solar-Type Eclipsing Binary Star V1094 Tauri, P. F.L. Maxted, R. J. Hutcheon, G. Torres, C. H.S. Lacy, J. Southworth, B. Smalley, K. Pavlovski, Laurence A. Marschall, and J. V. Clausen

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Quantitative Analysis of Single-Molecule Force Spectroscopy on Folded Chromatin Fibers, He Meng, Kurt Andresen, and John Van Noort

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Intrinsic Fluctuations and Driven Response of Insect Swarms, Rui Ni, James G. Puckett, Eric R. Dufresne, and Nicholas T. Ouellette

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Time-Frequency Analysis Reveals Pairwise Interactions in Insect Swarms, James G. Puckett, Rui Ni, and Nicholas T. Ouellette

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A Slow Neutron Polarimeter for the Measurement of Parity-Odd Neutron Rotary Power, W. M. Snow, E. Anderson, L. Barron-Palos, C. D. Bass, T. D. Bass, Bret E. Crawford, C. Crawford, J. M. Dawkins, D. Esposito, J. Fry, H. Gardiner, K. Gan, C. Haddock, B. R. Heckel, A. T. Holley, J. C. Horton, C. Huffer, J. Lieffers, D. Luo, M. Maldonado-Velazquez, D. M. Markoff, A. M. Micherdzinska, H. P. Mumm, J. S. Nico, M. Sarsour, S. Santra, E. I. Sharapov, H. E. Swanson, S. B. Walbridge, and V. Zhumabekova

2014

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Statistical Theory of Correlations in Random Packings of Hard Particles, Yuliang Jin, James G. Puckett, and Hernán A. Makse

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Structure and Decay Correlations of Two-Neutron Systems Beyond the Dripline, Z. Kohley, T. Baumann, D. Bazin, G. Christian, P. A. De Young, J. E. Finck, R. A. Haring-Kaye, J. Hinnefeld, N. Frank, E. Lunderberg, B. Luther, S. Mosby, W. A. Peters, J. K. Smith, J. Snyder, Sharon L. Stephenson, M. J. Strongman, A. Spyrou, M. Thoennessen, and A. Volya

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Searching for Effective Forces in Laboratory Insect Swarms, James G. Puckett, Douglas H. Kelley, and Nicholas T. Ouellette

Determining Asymptotically Large Population Sizes in Insect Swarms, James G. Puckett and Nicholas T. Ouellette

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Transit Timing Analysis in the HAT-P-32 System, M. Seeliger, D. P. Dimitrov, D. Kjurkchieva, M. Mallonn, M. Fernandez, M. Kitze, V. Casanova, G. Maciejewski, J. M. Ohlert, J. G. Schmidt, A. Pannicke, D. Puchalski, E. Gogus, T. Guver, S. Bilir, T. Ak, M. M. Hohle, T. O.B. Schmidt, R. Errmann, E.L.N. Jensen, D. H. Cohen, Laurence A. Marschall, G. Saral, I. Bernt, E. Derman, C. Galan, and R. Neuhauser

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Low-lying neutron unbound states in 12Be, J. K. Smith, T. Baumann, D. Bazin, J. Brown, S. Casarotto, P. A. DeYoung, N. Frank, J. Hinnefeld, M. Hoffman, M. D. Jones, Z. Kohley, B. Luther, B. Marks, N. Smith, J. Snyder, A. Spyrou, Sharon L. Stephenson, M. Thoennessen, N. Viscariello, and S. J. Williams

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Doe Dose, Sharon L. Stephenson

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Eduard, Sasha, and I Go to the Black Sea, Sharon L. Stephenson

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On Getting Dressed, Sharon L. Stephenson

2013

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Solution Scattering and FRET Studies of Nucleosomes Reveal DNA: Unwrapping Effects of H3 and H4 Tail Removal, Kurt Andresen, Isabel Jimenez-Useche, Steven C. Howell, Chongli Yuan, and Xiangyun Qiu

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The Stellar Content of the Young Open Cluster Trumpler 37, R. Errmann, Ralph Neuhäuser, Laurence A. Marschall, Guillermo Torres, M. Mugrauer, W. P. Chen, S.C Hu, C. Briceno, R. Chini, L. Bukowiecki, D. P. Dimitrov, D. Kjurkchieva, E.L.N. Jensen, D. H. Cohen, Z. Y. Wu, T. Pribulla, M. Vaňko, V. Krushevska, J. Budaj, Y. Oasa, A. K. Pandey, M. Fernandez, A. Kellerer, and C. Marka

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Elucidating Internucleosome Interactions and the Roles of Histone Tails, Steven C. Howell, Kurt Andresen, Isabel Jimenez-Useche, Chongli Yuan, and Xiangyun Qiu

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Equilibrating Temperaturelike Variables in Jammed Granular Subsystems, James G. Puckett and Karen E. Daniels

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Ion Competition in Condensed DNA Arrays in the Attractive Regime, Xiangyun Qiu, John Giannini, Steven C. Howell, Qi Xia, Fuyou Ke, and Kurt Andresen

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First Observation of 15Be, J. Snyder, T. Baumann, G. Christian, R. A. Haring-Kaye, P. A. DeYoung, Z. Kohley, B. Luther, M. Mosby, S. Mosby, A. Simon, J. K. Smith, A. Spyrou, Sharon L. Stephenson, and M. Thoennessen

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All Skate, Sharon L. Stephenson

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Approach, Sharon L. Stephenson

2012

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A Possible Detection of Occultation by a Proto-planetary Clump in GM Cephei, W. P. Chen, S. C.-L. Hu, R. Errmann, Ch. Adam, and Laurence A. Marschall

Hybrid Stars in a Strong Magnetic Field, Veronica Dexheimer, Rodrigo Negreiros, and Stefan Schramm

Quark Core Impact on Hybrid Star Cooling, Veronica Dexheimer, Rodrigo Negreiros, and Stefan Schramm

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Chromoelectric Oscillations in a Dynamically Evolving Anisotropic Background, Wojciech Florkowski, Radoslaw Ryblewski, and Michael T. Strickland

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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 L. Stephenson, and M. Thoennessen

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Boost-Invariant (2+1)-Dimensional Anisotropic Hydrodynamics, Mauricio Martinez, Radoslaw Ryblewski, and Michael T. Strickland

Properties and Stability of Hybrid Stars, Stefan Schramm, Rodrigo Negreiros, Jan Steinheimer, Torsten Schurhoff, and Veronica Dexheimer

Where Her Mind Is, Sharon L. Stephenson

Experiment on Direct N-N Scattering - the Radiation-Inducing Outgassing Complication, Sharon L. Stephenson, Bret E. Crawford, W. I. Furman, E. V. Lychagin, A. Yu Muzichka, G. V. Nekhaev, E. I. Sharapov, V. N. Shvetsov, A. V. Strelkov, B. G. Levakov, A. E. Lyzhin, Yu I. Chernukhin, C. R. Howeel, G. E. Mitchell, W. Tornow, and R. A. Showalter-Bucher

Thermal Bottomonium Suppression at RHIC and LHC, Michael T. Strickland and Dennis Bazow

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Bulk Properties of a Fermi Gas in a Magnetic Field, Michael T. Strickland, Veronica Dexheimer, and D.P. Menezes

2011

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Local origins of volume fraction fluctuations in dense granular materials, James G. Puckett, Frederic Lechenault, and Karen E. Daniels

2009

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Absolute Dimensions of the G7+K7 Eclipsing Binary Star IM Virginis: Discrepancies with Stellar Evolution Models, Juan Carlos Morales, Guillermo Torres, Laurence A. Marschall, and William C. Brehm

2008

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Mono- and Trivalent Ions around DNA: A Small-Angle Scattering Study of Competition and Interactions, Kurt Andresen, Xiangyun Qiu, Suzette A. Pabit, Jessica S. Lamb, Hye Yoon Park, Lisa W. Kwok, and Lois Pollack

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Reconstructing Three-Dimensional Shape Envelopes from Time-Resolved Small-Angle X-Ray Scattering Data, Jessica Lamb, Lisa W. Kwok, Xiangyun Qiu, Kurt Andresen, Hye Yoon Park, and Lois Pollack

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Abrupt Transition from a Free, Repulsive to a Condensed, Attractive DNA Phase, Induced by Multivalent Polyamine Cations, Xiangyun Qiu, Kurt Andresen, Jessica S. Lamb, Lisa W. Kwok, and Lois Pollack

2007

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Focusing Capillary Optics for Use in Solution Small-Angle X-Ray Scattering, Jessica S. Lamb, Sterling Cornaby, Kurt Andresen, Lisa W. Kwok, Hye Yoon Park, Xiangyun Qiu, Detlef-M. Smilgies, Donald H. Bilderback, and Lois Pollack

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Inter-DNA Attraction Mediated by Divalent Counterions, Xiangyun Qiu, Kurt Andresen, Lisa W. Kwok, Jessica S. Lamb, Hye Yoon Park, and Lois Pollack

2006

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Measuring Inter-DNA Potentials in Solution, Xiangyun Qiu, Lisa W. Kwok, Hye Yoon Park, Jessica S. Lamb, Kurt Andresen, and Lois Pollack

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The Eclipsing Binary V1061 Cygni: Confronting Stellar Evolution Models for Active and Inactive Solar-Type Stars, Guillermo Torres, Claud H. Sandberg Lacy, Laurence A. Marschall, Holly A. Sheets, and Jeff A. Mader

2005

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Optical Photometry and Spectroscopy of the Suspected "Cool Algol" AV Delphini: Determination of the Physical Properties, Jeff A. Mader, Laurence A. Marschall, Guillermo Torres, and Akbar H. Rizvi

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Planetary Transits of the Trans-Atlantic Exoplanet Survey- Candidate TrES-1b, Aaron Price, Ron Bissinger, Gregory P. Laughlin, Bruce L. Gary, Tonny Vanmunster, Arne A. Henden, Donn Ray Starkey, Daniel H. Kaiser, Jon A. Holtzman, Laurence A. Marschall, Thomas Michalik, T. Wellington, Pertti Paakkonen, Zsolt Kereszty, Russ Durkee, Kent Richardson, Robin Leadbeater, and Timothy P. Castellano

2004

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Spatial Distribution of Competing Ions around DNA in Solution, Kurt Andresen, R. Das, Hye Yoon Park, H. Smith, Lisa W. Kwok, Jessica S. Lamb, E. J. Kirkland, D. Herschlag, K. D. Finkelstein, and Lois Pollack

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Effect of Hydro-Resistance Training on Bat Velocity, Kristin J. Stuempfle, Bret E. Crawford, David F. Petrie, and Michael T. Kirkpatrick

2003

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Radial Velocity Survey of Members and Candidate Members of the TW Hydrae Association, Guillermo Torres, Eike W. Guenther, Laurence A. Marschall, Ralph Neuhauser, David W. Latham, and Robert P. Stefanik

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Optical Photometry and X-Ray Monitoring of the "Cool Algol" BD+05˚706: Determination of the Physical Properties, Guillermo Torres, Jeff A. Mader, Laurence A. Marschall, Ralph Neuhauser, and Alaine S. Duffy

2002

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Neutron Resonance Spectroscopy of 104Pd, 105Pd, and 110Pd, J D. Bowman, D A. Smith, Bret E. Crawford, T Haseyama, C A. Grossmann, A Masaike, Y Matsuda, G E. Mitchell, S I. Penttila, N R. Roberson, S J. Seestrom, E I. Sharapov, Sharon L. Stephenson, V W. Yuan, and A M. Sukhovoj

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Parity Violation in Neutron Resonances of Palladium, D A. Smith, J D. Bowman, Bret E. Crawford, C A. Grossmann, T Haseyama, A Masaike, Y Matsuda, G E. Mitchell, S I. Penttila, N R. Roberson, S J. Seestrom, E I. Sharapov, Sharon L. Stephenson, and V W. Yuan

2001

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Parity Violation in Neutron Resonances of Antimony and Iodine, Y Matsuda, J D. Bowman, Bret E. Crawford, P P J. Delheij, T Haseyama, J N. Knudsen, L Y. Lowie, A Masaike, G E. Mitchell, S I. Penttila, H Postma, N R. Roberson, S J. Seestrom, E I. Sharapov, Sharon L. Stephenson, Y-F Yen, and V W. Yuan

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Parity Violation in Neutron Resonances of 117 Sn, D A. Smith, J D. Bowman, Bret E. Crawford, C A. Grossmann, T Haseyama, Mikkel B. Johnson, A Masaike, Y Matsuda, G E. Mitchell, V A. Nazarenko, S I. Penttila, N R. Roberson, S J. Seestrom, E I. Sharapov, L M. Smotritsky, Sharon L. Stephenson, S Tomsovic, and V W. Yuan

2000

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New Search for Parity Violation in Nonresonant Neutron Scattering on Thorium, J D. Bowman, Bret E. Crawford, P P J. Delheij, C M. Frankle, M IInuma, J N. Knudsen, L Y. Lowie, A Masaike, Y Matsuda, S I. Penttila, H Postma, N R. Roberson, S J. Seestrom, E I. Sharapov, Sharon L. Stephenson, Y-F Yen, and V W. Yuan

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The Universe on a Desktop: Observational Astronomy Simulations in the Instructional Laboratory, Laurence A. Marschall

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A Desktop Universe for the Introductory Astronomy Laboratory, Laurence A. Marschall, Glenn A. Snyder, and Paul Richard Cooper

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Parity Violation in 232Th Neutron Resonances Above 250 eV, E I. Sharapov, J D. Bowman, Bret E. Crawford, P P J. Delheij, C M. Frankle, M IInuma, J N. Knudsen, L Y. Lowie, J E. Lynch, A Masaike, Y Matsuda, G E. Mitchell, S I. Penttila, H Postma, N R. Roberson, S J. Seestrom, Sharon L. Stephenson, Y-F Yen, and V W. Yuan

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Parity Violation in Neutron Resonances in 115In, Sharon L. Stephenson, J D. Bowman, J Corvi, Bret E. Crawford, P P J. Delheij, C M. Frankle, M IInuma, J N. Knudsen, L Y. Lowie, A Masaike, Y Matsuda, G E. Mitchell, S I. Penttila, H Postma, N R. Roberson, S J. Seestrom, E I. Sharapov, H M. Shimizu, Y-F Yen, V W. Yuan, and L Zanini

1999

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Parity Nonconservation in 106Pd and 108Pd Neutron Resonances, Bret E. Crawford, J D. Bowman, P P J. Delheij, T Haseyama, J N. Knudsen, L Y. Lowie, A Masaike, Y Matsuda, G E. Mitchell, S I. Penttila, H Postma, N R. Roberson, S J. Seestrom, E I. Sharapov, Sharon L. Stephenson, and V W. Yuan

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The Type Ia Supernova 1998bu in M96 and the Hubble Constant, Saurabh Jha, Peter M. Garnavich, Robert P. Kirshner, Peter Challis, Alicia M. Soderberg, Lucas M. Macri, John P. Huchra, Pauline Barmby, Elizabeth J. Barton, Perry Berlind, Warren R. Brown, Nelson Caldwell, Michael L. Calkins, Sheila J. Kannappan, Daniel M. Koranyi, Michael A. Pahre, Kenneth J. Rines, Krzysztof Z. Stanek, Robert P. Stefanik, Andrew H. Szentgyorgyi, Petri Vaisanen, Zhong Wang, Joseph M. Zajac, Adam G. Riess, Alexei V. Filippenko, Weidong Li, Maryam Modjaz, Richard R. Treffers, Carl W. Hergenrother, Eva K. Grebel, Patrick Seitzer, George H. Jacoby, Priscilla J. Benson, Akbar H. Rizvi '99, Laurence A. Marschall, Jeffrey D. Goldader, Matthew Beasley, William D. Vacca, Bruno Leibundgut, Jason Spyromilio, Brian P. Schmidt, and Peter R. Wood

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Parity Violation in Neutron Resonances in 107,109Ag, L Y. Lowie, J D. Bowman, J Corvi, Bret E. Crawford, P P J. Delheij, C M. Frankle, M IInuma, J N. Knudsen, A Masaike, Y Matsuda, G E. Mitchell, S I. Penttila, H Postma, N R. Roberson, S J. Seestrom, E I. Sharapov, and H M. Shimizu