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本文介绍一种穆斯堡尔谱采集和在线拟合的微机系统。在这一系统中,我们设计了一种6kB的微机用来采集数据。采集结束后,通过接口将所采集的数据输入用于拟合谱的,较大内存的微机。我们采用的是IBM—PC/XT微机,用它拟合一个a—Fe约4分钟。如果采用PC—1500微机,拟合一个a—Fe约10小时。拟合结束后,微机自动绘出穆斯堡尔谱图。采集系统装有输出接口,可在示波器上显示穆斯堡尔谱形。除了采集系统之外,穆斯堡尔谱仪还包括以12bitD/A转换器为基础的函数脉冲产生器,电磁振动器和负反馈放大器。谱仪的非线性好于0.2％,a—Fe的3、4峰的半宽度好于0.23mm/s。
This article presents a computer system for Mossbauer spectrum acquisition and online fitting. In this system, we designed a 6kB microcomputer to collect data. After the acquisition is completed, the collected data is input to the larger memory microcomputer for fitting the spectrum through the interface. We used an IBM-PC / XT microcomputer and used it to fit an a-Fe for about 4 minutes. If using a PC-1500 computer, fit a-Fe for about 10 hours. After fitting, the computer automatically draws the Mossbauer spectrum. Acquisition system equipped with an output interface can be displayed on the oscilloscope Mossbauer spectrum. In addition to the acquisition system, the Mörsbauer spectrometer also includes a function pulse generator, an electromagnetic vibrator, and a negative feedback amplifier based on a 12-bit D / A converter. The non-linearity of the spectrometer is better than 0.2%, and the half width of the 3,4 peak of a-Fe is better than 0.23mm / s.