We are developing a novel scheme for ultrasensitive isotopic analysis of noble gases which is based on photon-burst detection of the 1s5 metastable state. This scheme and recent progress are discussed.
B. D. Cannon,
T. J. Whitaker,
"Photon-Burst Spectroscopy Of Noble Gas Metastables For Isotopic Analysis", Proc. SPIE 0743, Fluorescence Detection, (1 January 1987); doi: 10.1117/12.966923; https://doi.org/10.1117/12.966923