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In this paper avalanche detection of a laser enhanced ionization (LEI) signal has been studied in a resonance ionization detector (RID) cell containing mercury vapour at room temperature. An avalanche multiplication factor of more than 8000 was achieved. The limit of detection of Hg resonance radiation (wavelength = 253.7 nm) was at the level of 0.5 quantum during the lifetime of the excited 6(3)P(1)(0) state. Detection of radiation from a conventional cw Hg discharge lamp source with a signal to noise ratio of more than 10E4 has been achieved.

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Authors: MATVEEN O I, University of Florida, Gainsville (US);SMITH B W, University of Florida, Gainsville (US);WINEFORDNER J D, University of Florida, Gainsville (US);OMENETTO N, JRC Ispra (IT)
Bibliographic Reference: Article: Spectrochimica Acta Part B, Vol. 51 (1996) pp. 563-567
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