Properties of a Windowless Gas-Flow G-M Counter for TSEE

A windowless gas-flow G-M counter with an internal sample holder was newly designed for detection of TSEE. Properties of the counter were studied for various temperatures of the sample holder and for gas-flow rates. The plateau region of the characteristic curve remarkably shifts to the lower side of anode voltage for higher temperatures of the sample holder and for smaller gas-flow rates. The counting rate of the detector for a fixed anode voltage depends to the temperature of the gas in the sensitive volume