LOW BACKGROUND END-WINDOW GEIGER-MULLER COUNTER
For exact measurement of weak beta -ray activities with a G-M counter, it is essential to reduce the natural background count without deteriorating the characteristics of the counter. A special type counter is devised for the purpose. The center wire of the counter is provided with a mica disc guard as a beta -ray absorber, dividing the counter into two separate compartments, each serving as an independent counter. With such a counter having a mica endwindow of 2 cm in diameter and shielded by lead blocks of 5 cm in thickness, the natural background count is reduced to 2 to 4 cpm by setting anticoincidence between the two component counters. Counters of this type are available for measuring weak beta activities. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-14-023093
- OSTI ID:
- 4159818
- Journal Information:
- Sci. Papers Inst. Phys. Chem. Research (Tokyo), Journal Name: Sci. Papers Inst. Phys. Chem. Research (Tokyo) Vol. Vol: 54
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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