The normal-incidence efficiencies of two laminar gratings and the reflectances of two parabolic mirrors with matching multilayer coatings were measured by monochromatic synchrotron radiation and were compared with modeling calculations. These optics were developed for the Extreme-Ultraviolet Imaging Spectrometer to be launched on the Japanese Solar-B mission. Each optic has two sectors coated w...

A study of the effects of the interactions with amino acids on the vibrational spectra of Keggin heteropolyanions (Na(n)H(3-)n[XM(12)O(40)](n-); n = 0,1,2,3; X = P(V), Si(IV), M = W(VI), Mo(VI)) has been performed. Interactions occurred for all of the studied compounds leading to changes and splits in the stretching frequencies. Depending on the amino acid type, the IR bands for interbridge str...

We present the first derivation of explicit analytic expressions for the environmental dependence of the sigma, pi, and delta bond integrals within the orthogonal two-center tight-binding approximation by using the recently developed bond-order potential theory to invert the nonorthogonality matrix. We illustrate the power of this new formalism by showing that it not only captures the transfera...

SOLAR SIC GRAIN OF TYPE X. E. Zinner, M. Jadhav, F. Gyngard, and L. R. Nittler. Laboratory for Space Sciences and Physics Deparment, Washington University, St. Louis, MO, USA. E-mail: [email protected] Department of Terrestrial Magnetism, Carnegie Institution, Washington, DC, USA. Introduction: Among presolar SiC grains from the LU fraction of the Murchison L separation series [1, 2], we identified...

The carboxylate species Mo(NR)(CHCMe2R′)(O2CCPh3)2 (R ) various aryl groups or 1-adamantyl; R′ ) Ph or Me) have been synthesized by salt metathesis between Mo(NR)(CHCMe2R′)(OTf)2(DME) (OTf ) trifluoromethanesulfonate; DME ) 1,2-dimethoxyethane) and sodium triphenylacetate. Other carboxylate compounds that have been prepared by this route include Mo(NAr)(CHCMe2Ph)(O2CR′′)2 (Ar ) 2,6-i-Pr2C6H3; R...