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Oxygen quenching in a LAB based liquid scintillator and the nitrogen bubbling model

2010; IOP Publishing; Volume: 34; Issue: 5 Linguagem: Inglês

10.1088/1674-1137/34/5/011

2058-6132

Hua-Lin Xiao, Deng Jing-Shan, Wang Naiyan,

Spectroscopy and Laser Applications

The oxygen quenching effect in a Linear Alkl Benzene (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 a function of the nitrogen bubbling time. It is shown that the light yield of the fully purged liquid scintillator is increased by 11% at room temperature and the room atmospheric pressure. A simple nitrogen bubbling model is proposed to describe the relationship between the relative light yield (oxygen quenching factor) and the bubbling time.