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Using a new-built high-resolution multichannel (e,2 e) spectrometer and a fast high-resolution electron energy loss spectrometer, the electron momentum spectra for some molecules and the electron energy loss spectra for noble atoms were measured at an impact energy of 2500 eV. Then the orbital assignments and the spin-orbit interactions for the outer valence molecular orbitals, as well as the dynamic behaviors for the valence excitation process of noble atoms, were investigated. In addition, the recent experiment on 1-butene shows that electron momentum spectroscopy is feasible to determine the Boltzmann-weighted abundances and thus to predict the relative stability for different conformers. [ABSTRACT FROM AUTHOR]

Some latest progress of the laboratory astrophysics in China are reviewed, particularly of those related to the atomic physics. This paper will address the problems related to the data needs in the area of analysis of modelling spectra emitted by laser facilities in laboratory as well as astrophysical plasmas. The atomic data required for some important unsolved problems in stellar spectroscopy are presented as well. [ABSTRACT FROM AUTHOR]

4B8 beamline at Beijing Synchrotron Radiation Facility (BSRF) is based on the previous 3B1B beamline with some modification. This beamline will focus on the advancement of vacuum ultraviolet circular dichroism (CD) spectroscopy for studying secondary structure of proteins. Along with beamline moving, some measurements are taken to overcome the exposed problems in 3B1B, such as optical contamination, high stray light level. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]

The article presents a research conducted on Lazurite, a part of the semi-precious stone Lapis Lazuli containing sodalite mineral. It was conducted on about thirty samples of the rock from various countries including Russia, China and Afghanistan. Raman Spectroscopy done on Lazurite can tell about its geographical source. The Lazurite's radical anion s3-, produces three spectras.

Besides nephrite, serpentine is also frequently employed as a jade material in China since the Neolithic period. Translucent or opaque, serpentine presents diverse colors, including yellow-green, green, dark green, and tan, which are related to its chemical composition and occasionally to its associated sub-major minerals. Serpentine could be subjected to color change due to secondary alterations or weathering. In this study, we mainly focus on the heating effect on serpentine, as some ancient serpentine jades may have been exposed to heat for some different reasons, such as carving, funeral ceremony or imitating. A series of non-heated and heat-treated raw serpentine jades are examined using Raman spectroscopy and other complementary methods. The subtle change of molecular structure and color of serpentine due to the heat treatment is reported in detail. [ABSTRACT FROM AUTHOR]