频率注入锁定的超再生NQR谱仪

波谱学杂志 ›› 1988, Vol. 5 ›› Issue (2): 173-178.

频率注入锁定的超再生NQR谱仪

丘海明, 肖坚德, 张光昭, 冯镇业, 郑小健

中山大学无线电电子学系

收稿日期:1987-07-02 出版日期:1988-06-05 发布日期:2018-01-22

AN INJECTION AND FREQUENCY LOCKED SUPER-REGENERATIVE NQR SPECTROMETER

Qiu Haiming, Xiao Jande, Zhang Guangzhao, Feng Zhenye, Zheng Xiaojian

Dept, of Radio-Electronics, Zhongshan University

Received:1987-07-02 Online:1988-06-05 Published:2018-01-22

摘要/Abstract

摘要： 本文首先简述超再生振荡器的频率注入锁定的基本原理,然后介绍一台频率注入锁定的超再生NQR谱仪的工作原理。该谱仪的频稳度高(10^-4-10^-5),频率测量方便,检测谱线线型失真小,可用来观察样品的NQR纯色散和纯吸收谱。
文中还给出用本谱仪检测的氯酸钠(NaClO₃)粉末中的³⁵Cl核的NQR纯吸收谱和纯色散谱。

关键词: 核电四极共振谱仪, 核电四极共振波谱

Abstract: The details of the design and construction of an injection and frequency locked super-regenerative oscillator (SRO) type NQR spectrometer working in the frequency range of 13MHz-40MHz are presented. The spectrometer is composed of external quench super-regenerative-oscillator, a continuous wave oscillator with stability of about 10^-5 and a frequency locked unit. The quench frequency can be continuously adjusted from 15KHz to 150KHz. The advantages of the spectrometer are as follows. (I) the pure absorption or pure dispersion line-shapes can be obtained separately (ii) its frequency stability is determined only by that of an independent oscillator which provides a frequency locking signal (iii) the resonant frequency can be measured directly by a frequency counter. (iv) easy adjustment. A series NQR spectra of ³⁵Cl were measured with the spectrometer, and the results are presented.

Key words: Nuclear Quadrupole Resonance Spectrometer, Nuclear Quadrupole Resonance Speclroscopy

丘海明, 肖坚德, 张光昭, 冯镇业, 郑小健. 频率注入锁定的超再生NQR谱仪[J]. 波谱学杂志, 1988, 5(2): 173-178.

Qiu Haiming, Xiao Jande, Zhang Guangzhao, Feng Zhenye, Zheng Xiaojian. AN INJECTION AND FREQUENCY LOCKED SUPER-REGENERATIVE NQR SPECTROMETER[J]. Chinese Journal of Magnetic Resonance, 1988, 5(2): 173-178.