LAB基液体闪烁体的氧猝灭和氮气鼓泡模型
Oxygen quenching in LAB based liquid scintillator and nitrogen bubbling model
摘要：
本文研究了以线性烷基苯（LAB）为溶剂，3g/L2，5-二苯基恶唑（PPO）为荧光剂，15 mg/LPDMATHABMM-双（$o$ -甲基苯乙烯基）苯（bis-MSB）为$λ$ -移位剂的液体闪烁体中氧猝灭效应。结果表明，在室温和室温大气压下，全吹扫液体闪烁体的光产额增加了11%。提出了一个简单的氮气鼓泡模型来描述相对光产额（氧猝灭因子）与鼓泡时间之间的关系。
英文摘要：
The oxygen quenching effect in Linear Alkl Benzne (LAB) based liquid scintillator (LAB as the solvent, 3 g/L 2, 5 diphe-nyloxazole (PPO) as the fluor and 15 mg/L $p$-bis-($o$-methylstyryl)-benzene (bis-MSB) as the $λ$-shifter) is studied by measuring the light yield as the function of the nitrogen bubbling time. It is shown that the light yield of the fully purged liquid scintillator is increased by 11% at the room temperature and the room atmosphere pressure. A simple nitrogen bubbling model is proposed to describe the relationship between the relative light yield (oxygen quenching factor) and the bubbling time.
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