What gas has an ionization energy less than 4.5 eV?

[Roger]

Hi,

I am working on a problem that requires a gas that has an ionization
energy around 4.5 eV. It's boiling point must be lower than room
temperature (20C), and preferable lower than -60C.

Any suggestions on what to use? or places to look for a solution for
this one?

Thanks

Roger Zimmerman

[Roger]

Post by Roger
Hi,
I am working on a problem that requires a gas that has an ionization
energy around 4.5 eV.  It's boiling point must be lower than room
temperature (20C), and preferable lower than -60C.
Any suggestions on what to use? or places to look for a solution for
this one?
Thanks
Roger Zimmerman

I see that Cesium has an ionization voltage lower than 5V, but has a
boiling point of about 700C. Does anyone know where a table is that
shows the boiling point VS pressure for Cesium? I may be able to
elevate the pressure.

Thanks

Roger