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Which outcome occurs when high noble gas pressure impacts detector photomultiplier quantum efficiency?

A)Broadening of atomic emission spectra
B)Increased excitation photon absorption
C)Quenching of excited state populations
D)Enhanced two-photon fluorescence efficiency

💡 Explanation

Quenching of excited states occurs because increased collision rate facilitates non-radiative relaxation, rather than radiative emission. Therefore, the photomultiplier’s gain decreases resulting in lowered quantum efficiency rather than alternative emission spectrum deviations.

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