Dead zone characteristics of SQS and GM tubes

Author

Koori, N. ; Nohtomi, A. ; Hashimoto, M. ; Yoshioka, K. ; Kumabe, I. ; Matsubara, S. ; Yoshizumi, M. ; Oshima, T.

Author_Institution

Dept. of Nucl. Eng., Kyushu Univ., Fukuoka, Japan

Volume

37

Issue

2

fYear

1990

fDate

4/1/1990 12:00:00 AM

Firstpage

107

Lastpage

111

Abstract

The characteristics of the dead zone of a gas counter were studied at gas pressures of 760-150 torr of Ar(75)+isoC₄H₁₀(25) mixture and compared with those of a commercially available GM tube. The counter operated in the SQS (self-quenching streamer) mode at pressures higher than 350 torr, and in the GM mode at the lower pressures; the operation mode changed around 350 torr, where the mean free path of VUV (vacuum ultraviolet) photons is about 50 μm. The dead zone of the counter used was evaluated to be 290 μs-cm for the SQS mode (at 760 torr) and 2450 μs-cm for the GM mode (at 150 torr). The counting rate capability of the SQS tube is more than one order of magnitude larger than that of the GM tube

Keywords

Geiger counters; gamma-ray detection and measurement; streamer chambers; commercially available GM tube; dead zone; gas counter; self-quenching streamer; Atmospheric measurements; Current measurement; Loss measurement; Pulse measurements; Pulse shaping methods; Radiation detectors; Shape measurement; Size measurement; Time measurement; X-rays;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.106600

Filename

106600