Jo, Jo, Jo... you’re arguing here against a simple fact of physics that has been demonstrated, understood and measured to parts per million accuracy for almost a century.
No, I’m not remotely interested in your argon experiment, because unlike you I understand the physical principles at play. I know why argon (just like nitrogen and oxygen) can’t absorb infrared radiation while gases like carbon dioxide, water and methane can. I know why molecular weight simply doesn’t come into it. So I know your request doesn’t make sense.
... and I’m fairly certain the detector is tuned to the 10 micron CO2 absorption band.
