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Search Publications

NIST Authors in Bold

Displaying 1051 - 1075 of 3841

Microscopic Insights into Ion Gel Dynamics using Neutron Spectroscopy

August 1, 2012
Author(s)
Maiko Kofu, Takenori Someya, Soichi Tatsumi, Kazuhide Ueno, Takeshi Ueki, Masayoshi Watanabe, Takuro Matsunaga, Mitsuhiro Shibayama, Victoria Garcia Sakai, Madhu Sudan Tyagi, Osamu Yamamuro
… We have investigated the microscopic dynamics of ion gels consisting of a PMMA [poly(methyl methacrylate)] … by means of quasi-elastic neutron scattering (QENS). These ion gels interestingly exhibit two glass transitions (T g S) … Microscopic Insights into Ion Gel Dynamics using Neutron Spectroscopy …

Monte Carlo / RRKM / Classical Trajectories Modeling of Collisional Excitation and Dissociation of n-Butylbenzene Ion in Multipole Collision Cells of Tandem Mass Spectrometers

May 18, 2010
Author(s)
Vadim D. Knyazev, Stephen Stein
… C 7 H 8 + ) ions in the electromagnetic field of multipole ion guides and collision cells, classical trajectory modeling … and scattering of ions, and RRKM modeling of the parent ion decomposition. Experimental information on the energy … Collisional Excitation and Dissociation of n-Butylbenzene Ion in Multipole Collision Cells of Tandem Mass Spectrometers …

Origin of Electrical Signals for Plasma Etching Endpoint Detection

November 18, 2011
Author(s)
Mark A. Sobolewski
… in substrate surface properties such as photoemitted or ion-induced electron yield. To investigate these effects, … in rf bias impedance coincides with an increase in ion current density and a change in the electron energy … distribution function (EEDF). The measured changes in ion current and EEDF, when input into a numerical model of …

Chlorine - Bromine Combination Isotope Intensities

June 9, 2015
Author(s)
Thomas J. Bruno
… table provides peak intensities (relative to the molecular ion (M+) at an intensity normalized to 100 percent) for … the absence of all other elements except carbon and hydrogen.1-4 The mass abundance calculations were based upon …

Study of hydrogen diffusion in superprotonic ionic conductors, MHXO4, by m+SR and QENS

February 21, 2009
Author(s)
Yutaka Ikedo, Hiroshi Nozaki, Masashi Harada, Jun Sugiyama, Taku J. Sato, Yasumitsu Matsuo, Kusuo Nishiyama, James S. Lord, Yiming Qiu, John R. Copley
… implies a relationship between the presence of the atomic hydrogen (Mu) state and high σH+ in Phase I of CHS. According … Study of hydrogen diffusion in superprotonic ionic conductors, MHXO4, …

Improving the efficiency of Monte Carlo simulations of ions using expanded grand canonical ensembles

October 9, 2019
Author(s)
Harold W. Hatch, Steven W. Hall, Jeffery R. Errington, Vincent K. Shen
… apparent requirement to insert and delete neutral sets of ions simultaneously in order to maintain charge neutrality. … by gradual insertion and deletion of these neutral sets of ions. We introduce an expanded ensemble approach which may be … existing methods to further improve efficiency. Individual ions are inserted or deleted in one Monte Carlo trial rather …
Displaying 1051 - 1075 of 3841
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