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題 名 | A Newly Designed Antivonincidence Proportional Counter for Measuring [92b0]Kr Concentrations in Ambient Air Samples=新穎設計反符合比例計數器量測環境中氪-85的濃度 |
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作 者 | 王愛義; 林鴻旭; 羅俊光; | 書刊名 | 臺灣應用輻射與同位素雜誌 |
卷 期 | 1:1 民94.12 |
頁 次 | 頁61-67 |
分類號 | 449.62 |
關鍵詞 | 氪-85; 反符合比例計數器; [92b0]Kr; Anticoincidence proportional counter; |
語 文 | 英文(English) |
中文摘要 | 本研究的主要目的是設計反符合比例計數器以度量環境中低階的氪-85。研究結果顯示對於氪-85的687keV最大β-能量,儀器的計數效率為5.78%,最小偵測活度為1.93Bq。移動式系統的回收率為91.6%,計數與採樣系統最低偵測極限為3.56Bqm-3,此改良的系統非常適用於環境中及低淡度氪-85的監測。 |
英文摘要 | An anticoincidence proportional counter has been developed for measuring low-level 85Kr concentrations in ambient air. The minimum detectable activity is 1.93Bq. and the counting efficiency is 5.78% based on the 687keV β- maximum energy of 85Kr. The recovery yield of the portable sampling system used was 91.6%. The lower limit of detection of this counting system and sampling was 3.56Bqm-3. This improved system is very suitable for monitoring ultra-low level 85Kr concentrations in ambient air. |
本系統中英文摘要資訊取自各篇刊載內容。