نتایج جستجو برای: pressure broadening
تعداد نتایج: 418582 فیلتر نتایج به سال:
We present an improved formula for the anomalous radial velocity of the star during planetary transits due to the Rossiter-McLaughlin (RM) effect. The improvement comes from a more realistic description of the stellar absorption line profiles, taking into account stellar rotation, macroturbulence, thermal broadening, pressure broadening, and instrumental broadening. Although the formula is deri...
Results of a series of experiments on pressure effects caused by various foreign gases on the 535.0 nm TI fluorescence line emitted due to the photodissociation of Til-molecules are summarized and some aspects of the Doppler and pressure broadening of this line are discussed. The impact broadeningand shift-cross sections are determined for two sets of mean relative velocities f of the emitter-p...
We present the coupling of a jet-stirred reactor to detection by cw-CRDS in the near infrared and first results obtained during the oxidation of methane. The mixture is rapidly expanded from the jet-stirred reactor into a 80 cm-long cw-CRDS cell maintained at a the pressure around 1.33 kPa, thus freezing the reaction and decreasing pressure broadening of the absorption lines. Some stable specie...
We report pressure-induced structural changes in PbSc(0.5)Ta(0.5)O3 studied by single-crystal x-ray diffraction and Raman scattering. The appearance of a soft mode, a change in the volume compressibility, broadening of the diffraction peaks, and suppression of the x-ray diffuse scattering show that a phase transition occurs near pc approximately 1.9 GPa. The critical pressure is associated with...
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