Now showing items 1-12 of 12

    • Anisotropic Hyperfine Interactions Limit the Efficiency of Spin-Exchange Optical Pumping of 3He Nuclei 

      Tscherbul, T. V.; Zhang, Peng; Sadeghpour, Hossein R.; Dalgarno, Alexander (American Physical Society (APS), 2011)
      We use accurate ab initio and quantum scattering calculations to demonstrate that the maximum He3 spin polarization that can be achieved in spin-exchange collisions with potassium (K39) and silver (Ag107) atoms is limited ...
    • Collision-Induced Spin Depolarization of Alkali-metal Atoms in Cold \(^3\)He Gas 

      Tscherbul, T.V.; Zhang, Peng; Sadeghpour, Hossein R.; Dalgarno, Alexander; Brahms, N.; Au, Yat Shan; Doyle, John M. (American Physical Society, 2008)
      We present a joint experimental and theoretical study of spin depolarization in collisions of alkali-metal atoms with \(^3\)He in a magnetic field. A rigorous quantum theory for spin-changing transitions is developed and ...
    • Collision-induced spin exchange of alkali-metal atoms withH3e: Anab initiostudy 

      Tscherbul, T. V.; Zhang, Peng; Sadeghpour, Hossein R.; Dalgarno, Alexander (American Physical Society (APS), 2009)
      We present a rigorous quantum study of spin-exchange transitions in collisions of the alkali-metal atoms with H3e in the presence of an external magnetic field. Using accurate ab initio interaction potentials, we obtain ...
    • Different Physical Activity Subtypes and Risk of Metabolic Syndrome in Middle-Aged and Older Chinese People 

      Chen, Mu; He, Meian; Min, Xinwen; Pan, An; Zhang, Xiaomin; Yao, Ping; Li, Xiulou; Liu, Yuewei; Yuan, Jing; Chen, Weihong; Zhou, Li; Fang, Weimin; Liang, Yuan; Wang, Youjie; Miao, Xiaoping; Lang, Mingjian; Zhang, Peng; Li, Dongfeng; Guo, Huan; Yang, Handong; Hu, Frank B.; Wu, Tangchun (Public Library of Science, 2013)
      Background: The prevalence of metabolic syndrome (MetS) is growing rapidly in China. Tai chi and dancing are common types of exercise among middle-aged and elderly Chinese. It remains unclear whether these activities are ...
    • Energy Relaxation In Collisions Of Hydrogen And Deuterium With Oxygen Atoms 

      Zhang, Peng; Kharchenko, Vasili A.; Jamieson, M.J.; Dalgarno, Alexander (American Geophysical Union, 2009)
      Collision energy transfer processes between hydrogen, deuterium, and oxygen atoms in the upper atmospheres of the terrestrial planets are studied. A new set of interaction potentials has been constructed using an accurate ...
    • Energy Transfer in O Collisions with He Isotopes and Helium Escape from Mars 

      Bovino, S.; Zhang, Peng; Gianturco, F. A.; Dalgarno, Alexander; Kharchenko, Vasili A. (Wiley-Blackwell, 2011)
      [1] Accurate data on energy-transfer collisions between hot oxygen atoms and the atmospheric helium gas on Mars, are reported. Anisotropic cross sections for elastic collisions of O(3P) and O(1D) atoms with helium gas have ...
    • Formation of van der Waals Molecules in Buffer-Gas-Cooled Magnetic Traps 

      Brahms, Nathan; Tscherbul, Timur; Zhang, Peng; Klos, Jacek; Sadeghpour, Hossein R.; Dalgarno, Alexander; Doyle, John M.; Walker, Thad G. (American Physical Society, 2010)
      We predict that a large class of helium-containing cold polar molecules form readily in a cryogenic buffer gas, achieving densities as high as 10\(^{12}\)  cm\(^{-3}\). We explore the spin relaxation of these molecules in ...
    • Gq/11-Mediated Signaling and Hypertrophy in Mice with Cardiac-Specific Transgenic Expression of Regulator of G-Protein Signaling 2 

      Park-Windhol, Cindy; Zhang, Peng; Zhu, Ming; Su, Jialin; Chaves, Leonard; Maldonado, Angel E.; King, Michelle E.; Rickey, Lisa M.; Cullen, Darragh; Mende, Ulrike (Public Library of Science, 2012)
      Cardiac hypertrophy is a well-established risk factor for cardiovascular morbidity and mortality. Activation of \(G_{q/11}\)-mediated signaling is required for pressure overload-induced cardiomyocyte (CM) hypertrophy to ...
    • Scattering of \(Yb\) and \(Yb^+\) 

      Zhang, Peng; Dalgarno, Alexander; Cote, Robin (American Physical Society, 2009)
      We calculate the cross sections for scattering of a neutral ytterbium atom with its positive ion at energies up to 30 eV. We identify peaks in the forward direction as arising from elastic collisions and those in the ...
    • Scattering of nitrogen molecules by silver atoms 

      Loreau, Jérôme; Zhang, Peng; Dalgarno, Alexander (AIP Publishing, 2012)
      We present a quantal study of the rotationally elastic and inelastic scattering of Ag and N(2), with the nitrogen molecule treated as a rigid rotor. The two-dimensional potential energy surface of the AgN(2) complex is ...
    • Structure and Spectroscopy of Ground and Excited States of LiYb 

      Zhang, Peng; Sadeghpour, Hossein R.; Dalgarno, Alexander (American Institute of Physics, 2010)
      Multireference configuration interaction and coupled cluster calculations have been carried out to determine the potential energy curves for the ground and low-lying excited states of the LiYb molecule. The scalar relativistic ...
    • Trapping Hydrogen Atoms From a Neon-Gas Matrix: A Theoretical Simulation 

      Bovino, S.; Zhang, Peng; Kharchenko, Vasili A.; Dalgarno, Alexander (American Institute of Physics, 2009)
      Hydrogen is of critical importance in atomic and molecular physics and the development of a simple and efficient technique for trapping cold and ultracold hydrogen atoms would be a significant advance. In this study we ...