https://experts.arizona.edu/en/publications/photoionization-resonances-of-si-ii-in-stellar-spectra/
Photoionization resonances of Si II in stellar spectra - University of Arizona
stellar spectrauniversity arizonaphotoionizationresonances
https://ehemj.com/article-1-752-en.html
Evaluation of direct reading photoionization detector performance under various operational...
Background: A hand-held portable direct-reading monitor, including photoionization detector (PID) is renowned for its good sensitivity, considerable dynamic...
photoionization detectorevaluationdirectreadingperformance