electron multiplier. The spectrum is then acquired by scanning these potentials. The electron detection stage of the analyzer is a channel plate or more usually a channel electron multiplier, which today are used in arrays of five, seven, or more to enhance the energy resolution and signal ...
An x-ray source utilizing anode material which shifts the output spectrum to higher energy and thereby obtains higher penetrating ability for screening mammography application, than the currently utilized anode material. The currently used anode material (molybdenum) produces an energy x-ray spectrum of...
X-ray s ources Laboratory Source (" X-ray tube" ) emitted spectrum: "characteristic radiation" due to fluorescence intensity K α K β "bremsstrahlung" due to deceleration of electrons in anode ~ 8 for Cu keV X-rays anode (Cu, Mo, ...) ...
产生的X 射线束是由各种能量(千电子伏特,keV)的光子组成的——这些光束被称为 “多色 X 射线(polychromatic x-rays)”,这些多色X射线,构成了 X 射线谱(x-ray spectrum)。 X 射线光谱中光子能量(keV)的最大值与 X 射线管的千伏(kV)相匹配: 如果X 射线管电压为 140 kV,则光谱的最大能量为 140 keV ...
能谱的面分布图(EDS mapping)提供样品中元素分布的信息。其中,谱面分布图(X-ray Spectrum Imaging,XSI)也被称为X射线谱学成像。它即可以定性又可以定量分析元素的空间分布,得到越发广泛的应用。 它记录图像每个像素上的完整谱图,即记录了完整的谱学数据库(x-y-Ep,其中x-y为图像中像素的坐标,Ep为能量)。这必...
2a. No additional absorption intrinsic to the source was required. We used the same single blackbody model to describe the X-ray spectrum in the second XMM-Newton observation and found a similar temperature for the blackbody emission (Fig. 2c). The data to model ratios, however, show a ...
ray spectrum appears like aGaussiancurve with a half-width of several tens ofelectron volts. Due to this low energy resolution, an EDS often cannot discriminate between two characteristic X-ray lines of close energy or determine the net intensity of a specific X-ray line. For these reasons, ...
The model predicts a very complex X-ray absorption spectrum, consisting of blends of shallow and very broad blue-shifted absorption lines and edges of Lα/Lc transitions of the most abundant elements. 展开 关键词: Galaxies X ray analysis Astrophysics Ultraviolet radiation Luminescence Spectrum ...
ray region of theelectromagnetic spectrumfalls far outside the range of visible wavelengths. However, the passage of X-rays through materials, including biologicaltissue, can be recorded with photographic films and other detectors. The analysis of X-ray images of the body is an extremely valuable ...
The 0.1–100 keV Spectrum of Centaurus X-3: Pulse Phase Spectroscopy of the Cyclotron Line and Magnetic Field Structure. Astrophys. J. 2000, 530, 429. [Google Scholar] [CrossRef] Mereghetti, S. X-ray emission from isolated neutron stars, High-Energy Emission from Pulsars and their Systems...