Theoretical Study on the Effect of Electron–Hole Pair Excitations in Resonant X-Ray Emission Spectroscopy for Ce Intermetallic Compounds

2002 ◽  
Vol 71 (11) ◽  
pp. 2804-2814 ◽  
Author(s):  
Makoto Nakazawa ◽  
Akio Kotani
Keyword(s):  
Intermetallic Compounds ◽  
Emission Spectroscopy ◽  
Theoretical Study ◽  
Hole Pair ◽  
Electron Hole ◽  
X Ray ◽  
Electron Hole Pair

scholarly journals Characterization of a quadrant diamond transmission X-ray detector including a precise determination of the mean electron–hole pair creation energy

2018 ◽  
Vol 25 (2) ◽  
pp. 407-412
Author(s):  
Jeffrey W. Keister ◽  
Levent Cibik ◽  
Swenja Schreiber ◽  
Michael Krumrey
Keyword(s):  
Precise Determination ◽  
Pair Creation ◽  
Hole Pair ◽  
Photon Flux ◽  
Electron Hole ◽  
X Ray ◽  
Incoming Photon ◽  
Electron Hole Pair ◽  
Transmission Detector ◽  
The Mean

Precise monitoring of the incoming photon flux is crucial for many experiments using synchrotron radiation. For photon energies above a few keV, thin semiconductor photodiodes can be operated in transmission for this purpose. Diamond is a particularly attractive material as a result of its low absorption. The responsivity of a state-of-the art diamond quadrant transmission detector has been determined, with relative uncertainties below 1% by direct calibration against an electrical substitution radiometer. From these data and the measured transmittance, the thickness of the involved layers as well as the mean electron–hole pair creation energy were determined, the latter with an unprecedented relative uncertainty of 1%. The linearity and X-ray scattering properties of the device are also described.

scholarly journals A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 392 ◽  
Author(s):  
Meng Sun ◽  
Raja Senthil ◽  
Junqing Pan ◽  
Sedahmed Osman ◽  
Abrar Khan
Keyword(s):  
Electron Microscopy ◽  
Visible Light ◽  
Rhodamine B ◽  
Diffuse Reflectance Spectroscopy ◽  
Hole Pair ◽  
Precipitation Method ◽  
Aqueous Environment ◽  
Electron Hole ◽  
X Ray ◽  
Electron Hole Pair

In this work, we have synthesized the rod-on-rod–like α-FeOOH/α-AgVO3 nanocomposite photocatalysts with the different amounts of solvothermally synthesized α-FeOOH nanorods via a simple co-precipitation method. The as-synthesized photocatalysts were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, UV−Visible diffuse reflectance spectroscopy, scanning electron microscopy (SEM), element mapping, high-resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS) analysis. The observed SEM images show that both α-AgVO3 and α-FeOOH exhibits the rod-shaped morphology with nano size. Furthermore, the photocatalytic activities of the obtained photocatalysts were evaluated towards the degradation of Rhodamine B (RhB) under visible-light irradiation. It is demonstrated that the 3 mg α-FeOOH added to the α-FeOOH/α-AgVO3 nanocomposite exhibited an enhanced photocatalytic performance as compared with the pure α-AgVO3 and α-FeOOH. This significant improvement can be attributed to the increased photo-excited electron-hole pair separation efficiency, large portion of visible-light absorption ability and the reduced recombination of the electron-hole pair. The recycling test revealed that the optimized nanocomposite exhibited good photostability and reusability properties. In addition, the believable photodegradation mechanism of RhB using α-FeOOH/α-AgVO3 nanocomposite is proposed. Hence, the developed α-FeOOH/α-AgVO3 nanocomposite is a promising material for the degradation of organic pollutants in an aqueous environment.

Observation of the effect of DAP separation on electron-hole pair ODMR signals in GaS

1982 ◽  
Vol 44 (4) ◽  
pp. 459-464 ◽  
Author(s):  
N. Killoran ◽  
B.C. Cavenett ◽  
F. Levy
Keyword(s):  
Hole Pair ◽  
Electron Hole ◽  
Electron Hole Pair
Sign in / Sign up

Export Citation Format

Share Document