Spectrum of 1Gbq tritium, Raysid <7% FWHM

I took a spectrum with my Raysid <7% FWHM, of this small 1Gbq tritium keychain, and it almost instantly showed the 11/12 keV peak line.

I took a spectrum with my Raysid <7% FWHM, of this small 1Gbq tritium keychain, and it almost instantly showed the 11/12 keV peak line.