Department of Physics, Adam Mickiewicz University, Poznan, Poland.
Magn Reson Chem. 2011 Jul;49(7):385-8. doi: 10.1002/mrc.2758. Epub 2011 Mar 31.
A three-component Ge-As-Se system is studied by the nuclear quadrupole resonance (NQR) method on (75)As nuclei and by the nutation NQR spectroscopy. The NQR (75)As spectra of the glasses Ge(0.021) As(0.375) Se(0.604), Ge(0.043) As(0.348) Se(0.609) and Ge(0.068) As(0.318) Se(0.614) reveal broad lines with two peaks assigned to the main structural unit of As(2)Se(3). With increasing average coordination number ( ̅r), the spectrum signals are shifted towards higher frequencies. At ̅r > 2.54, the spectrum becomes complex, which is a consequence of formation of more complex molecular structures in the glasses of high content of germanium. At fixed frequencies the asymmetry parameter η of the samples studied is determined.
采用核四极矩共振（NQR）法研究了（75）As 核的 Ge-As-Se 三组分体系，并采用摆动 NQR 光谱法进行了研究。玻璃 Ge(0.021) As(0.375) Se(0.604)、Ge(0.043) As(0.348) Se(0.609) 和 Ge(0.068) As(0.318) Se(0.614) 的（75）As NQR 谱显示出两条峰的宽谱线，归因于 As(2)Se(3)的主要结构单元。随着平均配位数（ ̅r）的增加，谱信号向更高的频率移动。在 ̅r > 2.54 时，谱变得复杂，这是由于高锗含量玻璃中形成了更复杂的分子结构。在固定频率下，确定了所研究样品的不对称参数 η。
