Abstract
We present a comparison of some characteristics of helium counters for measurements of low intensity neu- tron flux. We focus on neutron flux density measurements in low background laboratories. Because of an extremely low counting rate (few events per hour or less), we have con- centrated on counter parameters which are sometimes mean- ingless under regular conditions, i.e. background from inter- nal alpha radioactivity, percentage of events in full energy peak, and the width of this peak. The background depends on residual radioactivity of the counter tube material and can not be eliminated. The full energy peak characteristics can be specified by counter gas composition. We will present a comparison of four types of helium gas counters.
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