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101.
K.R. Hogstrom B.W. Mayes L.Y. Lee J.C. Allred Clark Goodman G.S. Mutchler C.R. Fletcher G.C. Phillips 《Nuclear Physics A》1973,215(3):598-604
Reaction cross sections for 12C(π+, πN)11C at 134, 161, 177, and 200 MeV and for 19F(π+,πN) at 161, 177, and 200 MeV were measured by activation methods. 相似文献
102.
103.
Frank O Goodman 《Surface science》1976,60(1):45-64
A simplified model is presented for classical-mechanical calculation of the energy accommodation coefficient in gas-surface scattering: conservation of the tangential component of momentum of a gas atom is assumed, allowing restriction to a consideration of the changes in only the normal component of momentum, and the solid is represented by a single atom joined by a harmonic spring to a rigid wall; the gas atom-solid atom interaction is modelled by a (different) harmonic spring, the force-constant of which depends on the gas temperature. The model was devised to help point a way to solving some of the outstanding problems in more realistic (lattice) models: one major problem is the existence or non-existence of thermal equilibrium of a gas and a surface if their temperatures are equal, and another is the handling of the phenomenon of trapping, or sticking, of a gas atom at a surface. Some light is shed on both of these (and on some other) problems. Wherever possible, comparison is made with the best available experimental data. 相似文献
104.
105.
Roe Goodman 《Journal of Functional Analysis》1979,31(1):115-137
Let G be a connected, simply-connected complex nilpotent Lie group, and Gr ?( G a real form of G. Motivated by the problem of analytic continuation of Banach-space representations of GR to holomorphic representations of G, we construct translation-invariant locally-convex algebras of entire functions on G (generalizing the classical spaces of entire functions of finite exponential order). The dual spaces of these algebras are naturally identified with algebras of left-invariant differential operators of infinite order on G. In connection with analytic continuation of unitary representations of GR, we study the convex cone of entire functions on G whose restrictions to GR are positive-definite, and determine the minimal order of growth at infinity of such functions. 相似文献
106.
Alan L. Goodman 《Nuclear Physics A》1979,325(1):171-188
Angular momentum is approximately projected from Hartree-Fock-Bogoliubov cranked (HFBC) wave functions. At each J the projected energy is . The spin-dependent fluctuation includes contributions from Jy and Jz as well as Jx. There are no correlations in the three angular momentum components. Projected energies are calculated for 168, 170Yb and 174Hf. When compared to experimental energies, the projected spectra are less compressed than the HFBC spectra. At low spins the projected and experimental energies are in good agreement. 相似文献
107.
We find that the correlation between the L=0 component of the (6Li, 6He) reaction and the GT matrix element holds down to a very low level of GT strength, and that essentially all (90%) of the GT strength lies in the 3.95 MeV state of 14N. 相似文献
108.
109.
110.
We have used in situ polarization-modulation infrared reflection absorption spectroscopy to study the adsorption/dissociation of NO on Rh(111). While these studies have not been conclusive regarding the detailed surface structures formed during adsorption, they have provided important new information on the dissociation of NO on Rh(111). At moderate pressures (< or =10(-6) Torr) and temperatures (<275 K), a transition from 3-fold hollow to atop bonding is apparent. Data indicate that this transition is not due to the migration of the 3-fold hollow NO but rather to the adsorption of gas-phase NO that is directed toward the atop position due to the presence of NO decomposition products, particularly chemisorbed atomic O species at the hollow sites. These results indicate that NO dissociation occurs at temperatures well below the temperature previously reported. Additionally, high pressure (1 Torr) NO exposure at 300 K results in only atop NO, calling into question the surface structures previously proposed at these adsorption conditions consisting of atop and 3-fold hollow sites. 相似文献