نتایج جستجو برای: electron spectrometer
تعداد نتایج: 327383 فیلتر نتایج به سال:
Ultrafast electron diffraction (UED) has been developed to study transient structures in complex chemical reactions initiated with femtosecond laser pulses. This direct imaging of reactions was achieved using our third-generation apparatus equipped with an electron pulse (1.07 +/- 0.27 picoseconds) source, a charge-coupled device camera, and a mass spectrometer. Two prototypical gas-phase react...
synthesis, characterization, spectral and theoretical calculations of sodium tetrafluoroborate (iii) (stfb) has been studied in this research. sodium tetrafluoroborate (iii) was synthesized by a sonochemical method and characterized by ir, uv/vis, 11b-nmr and mass spectrometer techniques. the nano compound was characterized by scanning electron microscopy (sem), x-ray powder diffraction (xrd) a...
α-fe2o3 (hematite) is the most stable iron oxide under ambient conditions. this transition metal oxide has been extensively investigated because it has unique electrical and catalytic properties. in this report, a novel microwave method for preparation of α-fe2o3 nanoparticles has been developed. the process contained two steps: first, precursor were obtained from a mixed solution of 50 ml of 0...
in this research zinc oxide (zno) nano-crystalline powders were prepared by sol-gel method using zinc acetate. the zno nanoparticles were characterized by x-ray diffraction (xrd), scanning electron microscopy (sem), ultraviolet-visible (uv-vis), fourier transform infra-red (ft-ir) and energy dispersive x-ray (edx) spectroscopy. the structure of nanoparticles was studied using xrd pattern. the c...
A scanning-type crystal spectrometer for high-resolution Compton pro®le measurements has been constructed at the High Energy Inelastic Scattering Beamline (ID15B) of the ESRF. Radiation from a seven-period asymmetrical permanent-magnet wiggler or from a superconducting wavelength shifter is focused horizontally onto the sample by a bent-crystal monochromator. Typical energies are 30, 50 and 60 ...
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