自動温度可変消滅γ線ドップラー拡がり測定装置の製作と金属の熱平衡状態測定への応用
1992 年 41 巻 11 号 p. 570-573
詳細
1992 年 41 巻 11 号 p. 570-573
The measurement system for Doppler broadening profiles of annihilation radiations was developed. This system reads out data for energies of r-rays from an analog to digital converter and those for specimen temperature from a digital-voltmeter coupled to a thermocouple. These two types of digital-quantities were stored in a memory matrix of 512 channels (energy) ×128 channels (temperature) ×4 byte (count) . For this purpose, a memory board of 256 kbyte with 32-dynamic RAMs (64 kbits) was used. The data acquisition was controlled by a microcomputer. Temperature of the specimen was controlled by a programmable temperature controller, thus it can be varied in a desired way. This was useful for measurements in repeated temperature cycles. A sample heater with a compact size was developed in order to obtain a homogeneous temperature distribution in the specimen. Application of this system for a study of thermal vacancies in Al-dilute alloys was also shown.
