Now showing items 821-840 of 2182

    • Ion Acoustic Waves in Ultracold Neutral Plasmas 

      Castro, J.; McQuillen, P.; Killian, T.C. (2010)
      We photoionize laser-cooled atoms with a laser beam possessing spatially periodic intensity modulations to create ultracold neutral plasmas with controlled density perturbations. Laser-induced fluorescence imaging reveals ...
    • Ion holes in the hydrodynamic regime in ultracold neutral plasmas 

      McQuillen, P.; Castro, J.; Strickler, T.; Bradshaw, S.J.; Killian, T.C. (2013)
      We describe the creation of localized density perturbations, or ion holes, in an ultracold neutral plasma in the hydrodynamic regime, and show that the holes propagate at the local ion acoustic wave speed. We also observe ...
    • Ion Segregation in Aqueous Solutions 

      Bian, Hongtao; Li, Jiebo; Zhang, Qiang; Chen, Hailong; Zhuang, Wei; Gao, Yi Qin (2012)
    • Ion temperature evolution in an ultracold neutral plasma 

      McQuillen, P.; Strickler, T.; Langin, T.; Killian, T.C. (2015)
      We study the long-time evolution of the ion temperature in an expanding ultracold neutral plasma using spatially resolved, laser-induced-fluorescence spectroscopy. Adiabatic cooling reduces the ion temperature by an order ...
    • Ionization of Rydberg atoms at patterned electrode arrays 

      Pu, Y.; Dunning, F.B. (2013)
      Lithographically patterned micrometer-scale electrode arrays are used to examine the effects of controlled surface electric fields on Rydberg-atom–surface interactions. The data show that application of modest electrode biases ...
    • Iron carbonyl clusters with ECl2 units (E = P, As) 

      Schipper, Desmond E.; Chen, Jing-Han; Whitmire, Kenton H. (2017)
      Reaction of [PPN][HFe(CO)4] (PPN = bis(triphenylphosphine)iminium) with PCl3 in a 1:1 ratio produced small amounts of [PPN][P{Fe(CO)4}2Cl2] ([PPN][Ia]). Reaction of [Et4N][HFe(CO)4] with AsCl3 in a 1:0.75 ratio in THF at ...
    • Irradiated interfaces in the Ara OB1, Carina, Eagle Nebula, and Cyg OB2 massive star formation regions 

      Hartigan, P.; Palmer, J.; Cleeves, L.I. (2012)
      Regions of massive star formation offer some of the best and most easily-observed examples of radiation hydrodynamics. Boundaries where fully-ionized H II regions transition to neutral/molecular photodissociation regions ...
    • Ising-nematic order in the bilinear-biquadratic model for the iron pnictides 

      Ergueta, Patricia Bilbao; Nevidomskyy, Andriy H. (2015)
      Motivated by the recent inelastic neutron scattering (INS) measurements in the iron pnictides which show a strong anisotropy of spin excitations even above the magnetic transition temperature TN, we study the spin dynamics ...
    • Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in √sNN=200 GeV Au+Au collisions 

      STAR Collaboration; Butterworth, J.; Eppley, G.; Geurts, F.; Roberts, J.B.; Xin, K.; Yepes, P. (2015)
      A data-driven method was applied to Au+Au collisions at √sNN=200 GeV made with the STAR detector at RHIC to isolate pseudorapidity distance Δη-dependent and Δη-independent correlations by using two- and four-particle ...
    • Isotope effects in aqueous solvation of simple halides 

      Videla, Pablo E.; Rossky, Peter J.; Laria, D. (2018)
      We present a path-integral-molecular-dynamics study of the thermodynamic stabilities of DOH⋯ X− and HOD⋯ X− (X = F, Cl, Br, I) coordination in aqueous solutions at ambient conditions. In agreement with experimental evidence, ...
    • Isotopic equilibria in aqueous clusters at low temperatures: Insights from the MB-pol many-body potential 

      Videla, Pablo E.; Rossky, Peter J.; Laria, Daniel (2018)
      By combining path-integrals molecular dynamics simulations with the accurate MB-pol potential energy surface, we investigate the role of alternative potential models on isotopic fractionation ratios between H and D atoms ...
    • Isotopic ordering in atmospheric O2 as a tracer of ozone photochemistry and the tropical atmosphere 

      Yeung, Laurence Y.; Murray, Lee T.; Ash, Jeanine L.; Young, Edward D.; Boering, Kristie A.; Atlas, Elliot L.; Schauffler, Sue M.; Lueb, Richard A.; Langenfelds, Ray L.; Krummel, Paul. B.; Steele, L. Paul; Eastham, Sebastian D. (2016)
      The distribution of isotopes within O2 molecules can be rapidly altered when they react with atomic oxygen. This mechanism is globally important: while other contributions to the global budget of O2 impart isotopic signatures, ...
    • Isotropic Seebeck coefficient of aligned single-wall carbon nanotube films 

      Fukuhara, Kengo; Ichinose, Yota; Nishidome, Hiroyuki; Yomogida, Yohei; Katsutani, Fumiya; Komatsu, Natsumi; Gao, Weilu; Kono, Junichiro; Yanagi, Kazuhiro (2018)
      How the morphology of a macroscopic assembly of nanoobjects affects its properties is a long-standing question in nanomaterials science and engineering. Here, we examine how the thermoelectric properties of a flexible thin ...
    • Issues Affecting the Synthetic Scalability of Ternary Metal Ferrite Nanoparticles 

      Morrow, Lauren; Barron, Andrew R. (2015)
      Ternary Mn-Zn ferrite (MnxZn1-xFe2O4) nanoparticles (NPs) have been prepared by the thermal decomposition of an oleate complex, sodium dodecylbenzenesulfonate (SDBS) mediated hydrazine decomposition of the chloride salts, ...
    • An itinerant antiferromagnetic metal without magnetic constituents 

      Svanidze, E.; Wang, Jiakui K.; Besara, T.; Liu, L.; Huang, Q.; Siegrist, T.; Frandsen, B.; Lynn, J.W.; Nevidomskyy, Andriy H.; Gamża, Monika B.; Aronson, M.C.; Uemura, Y.J.; Morosan, E. (2015)
      The origin of magnetism in metals has been traditionally discussed in two diametrically opposite limits: itinerant and local moments. Surprisingly, there are very few known examples of materials that are close to the ...
    • Itinerant chiral ferromagnetism in a trapped Rashba spin-orbit-coupled Fermi gas 

      Zhang, Shang-Shun; Liu, Wu-Ming; Pu, Han (2016)
      We consider a repulsive two-component Fermi gas confined in a two-dimensional isotropic harmonic potential and subject to a large Rashba spin-orbit coupling. The single-particle dispersion can be tailored by the ...
    • J/ψ and ψ (2S) production in pp collisions at √s=7Tev 

      CMS Collaboration; Adair, A.; Boulahouache, C.; Cuplov, V.; Ecklund, K.M.; Geurts, F.J.M.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2012)
      A measurement of the J/ψ and ψ(2S) production cross sections in pp collisions at √s=7TeV with the CMS experiment at the LHC is presented. The data sample corresponds to an integrated luminosity of 37 pb−1. Using a fit to ...
    • J/ψ polarization in p+p collisions at √s=200 GeV in STAR 

      STAR Collaboration; Butterworth, J.; Eppley, G.; Geurts, F.; Llope, W.J.; McDonald, D.; Roberts, J.B.; Xin, K.; Yepes, P. (2014)
      We report on a polarization measurement of inclusive J/ψ mesons in the di-electron decay channel at mid-rapidity at 2<pT<6 GeV/c in p+p collisions at √s=200 GeV. Data were taken with the STAR detector at RHIC. The J/ψ ...
    • J/ψ production at low pT in Au + Au and Cu + Cu collisions at √sNN =200 GeV with the STAR detector 

      STAR Collaboration; Butterworth, J.; Eppley, G.; Geurts, F.; Llope, W.J.; Roberts, J.B.; Xin, K.; Yepes, P. (2014)
      The J/ψ pT spectrum and nuclear modification factor (RAA) are reported for pT<5GeV/c and |y|<1 from 0% to 60% central Au+Au and Cu+Cu collisions at √ sNN =200GeV at STAR. A significant suppression of pT-integrated J/ψ ...
    • J/ψ production cross section and its dependence on charged-particle multiplicity in p + p collisions at s=200 GeV 

      STAR Collaboration; Brandenburg, J.D.; Butterworth, J.; Eppley, G.; Geurts, F.; Roberts, J.B.; Tlusty, D. (2018)
      We present a measurement of inclusive J/ψ production at mid-rapidity (|y|<1) in p+p collisions at a center-of-mass energy of s=200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The differential ...