RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
A Thin 4πβ-Counter Operating by Negative High Voltage for the 4πβ-γ Coincidence Measurement
-Construction-
Hiroshi MIYAHARAMasakazu SUZUKITamaki WATANABE
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1978 Volume 27 Issue 8 Pages 439-444

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Abstract

A thin 4πβ-multiwire proportional counter was constructed to increase the γ-ray counting efficiency in the 4πβ-γ coincidence method. This counter with a counting volume of 70×60×11 mm and 5 wires in one half was made of an insulator and negative high voltage was supplied to the inner wall being possessed of conductivity. Then the anodes were operated at the earth potential and compact preamplifiers with no coupling condenser were fixed at the side of each half to miniaturize a shielding system for background.
From the experimental results in various conditions, good characteristics were obtained in the case that signals were taken out from the center anode and the others were used only for cleaning up excess charges.

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© Japan Radioisotope Association
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