Experimental study on the fluorescence spectrum in the near-ultraviolet and visible regions of a carbon dioxide gas Cerenkov medium

We investigated the faintfluorescencespectrum ofcarbon dioxide in the near-ultraviolet and visible regions using an intense relativistic electron beam accelerator with an energy of 0.2 –0.3 MeV. Monte Carlo simulations were carried out in advance to maximize the signal-to-noise ratio and a self-normalization pulse experimental layout was designed to overcome the shot-to-shot fluctuations in different pulses of the accelerator. Ultimately, the relative proportion sequences in the near-ultraviolet and visible regions of acarbon dioxidefluorescencespectrum were successfully obtained for the first time. The result shows that there exists distinct difference betweenfluorescencespectrum and Cerenkovspectrum, which can therefore provide basic support for selectively reducing the unwanted below-thresholdfluorescence response of acarbon dioxide gas Cerenkov medium.

Source: Review of Scientific Instruments - November 11, 2016 Category: Physics Authors: Xingyin Guan, Huasi Hu, Zhaohui Song and Hetong Han Source Type: research