I remember reading somewhere that radon could be detected with a geiger counter by checking the dust in the HVAC air filter for beta, something about secondary emissions, but I cannot find the article. I was hoping that the neutrons produced would interact with more of the beryllia to produce beta particles that could be detected without the candle wax/neutron detection.. Are you suggesting that the beryllia would need to be ground and mixed with wax for the neutrons to react with the beryllia (defeating the point)?
The problem with scintillation counting is that I believe the alphas will also cause scintillation, so I would be detecting the alpha source. The goal was to use the alpha source without scintillation to prevent the detection of the alphas lettnig the geiger counter only detect the product of secondary beryllia emission from interaction with the alphas. Besides, scintillation materials require a photomultiplier tube i think and I wanted to avoid that too.
Thanks! I go will take a look at that link.