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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Nuclear quadrupole resonance study of the glassy AsxSe1-x system
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Nuclear quadrupole resonance study of the glassy AsxSe1-x system

机译：玻AsxSe1-x系统的核四极共振研究

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Nuclear quadrupole resonance (NQR) of As-75 has been used to study the local bonding structure of glassy arsenic-selenium systems. We have studied the glassy system AsxSe1-x with x = 0.08, 0.15, 0.27, 0.32, 0.36, 0.40, 0.50, and 0.60 using As-75 NQR at liquid nitrogen temperature (77 K). The As-75 NQR spin-echo spectra from x = 0.08 up to x = 0.40 each consist of a single broad line. As the concentration of arsenic increases. the positions of the peaks decrease approximately linearly from 63 MHz at x = 0.08 to 58 MHz at x = 0.40. For x = 0.50, the spectrum, consists of a very broad asymmetric peak near 81 MHz. The spectrum for x = 0.60 consists of three well-resolved, narrow peaks, but otherwise extends over a similar frequency range as that of x = 0.50. By comparison with NQR spectra that occur in crystalline arsenic-selenium compounds. these three peaks have been interpreted as due to three fold co-ordinated, pyramidal arsenic sites with, varying numbers of arsenic-arsenic bonds. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 9]
机译：As-75的核四极共振（NQR）已用于研究玻璃状砷硒系统的局部键合结构。我们使用液氮温度（77 K）下的As-75 NQR研究了x = 0.08、0.15、0.27、0.32、0.36、0.40、0.50和0.60的玻璃态系统AsxSe1-x。从x = 0.08到x = 0.40的As-75 NQR自旋回波谱均由一条宽线组成。随着砷浓度的增加。峰值的位置从x = 0.08时的63 MHz线性降低到x = 0.40时的58 MHz线性下降。对于x = 0.50，频谱由一个接近81 MHz的非常宽的不对称峰组成。 x = 0.60的频谱由三个分辨良好的窄峰组成，但在其他范围内的扩展范围与x = 0.50相同。通过与晶体砷硒化合物中发生的NQR光谱进行比较。这三个峰被解释为归因于三重配位的金字塔形砷位点，具有不同数量的砷-砷键。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：9]

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