High-sensitivity detection of tritiated water vapour using tunable diode lasers |
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| Affiliation: | 1. Department of Materials and Synchrotron Radiation Engineering, University of Hyogo, 2167, Shosha, Himeji, Hyogo 671-2280, Japan;2. Department of Materials and Synchrotron Radiation Engineering, LASTI, University of Hyogo, Kamigori, Hyogo 678-1205, Japan;3. Tocalo Co., Ltd., 6-4-4 Minatojimaminami, Chuo, Kobe, Hyogo 650-0047, Japan |
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| Abstract: | A tunable lead-salt diode laser and a multipass optical cell are used to detect traces of tritiated water vapour in air. The present system has a sensitivity of ∼ 700 μCi/m3 if the air sample directly enters the cell, and an enhanced sensitivity of 35 μCi/m3 if the water vapour is precondensed from the air sample. The instrument is free from interference from HT or other radioactive species which may be present in the sample. |
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