The performance of a gas scintillation counter at high count rates

Using a gas mixture of 10% N2 in argon in a gas scintillation counter with a thick wire anode of 400 μm, the energy resolution and the mean pulse height from the photomultiplier were studied at rates up to 10 MHz. A shift of the pulse heigth o only 10% was measured for a rate of 6 MHz, with an energy resolution of 56% for 6.9 keV X-rays.