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arXiv 1102.1825physics.ins-dethep-exnucl-ex
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气氩和液氩的红外闪烁产额

Infrared scintillation yield in gaseous and liquid argon

A. Buzulutskov, A. Bondar, A. Grebenuk

摘要:

研究惰性气体和液体中的一次和二次相变对以惰性气体为介质的稀有事件实验至关重要。在目前的工作中,气体和液体Ar的闪烁产率已首次在近红外(NIR)和可见光区,无论是初级和二级(比例)闪烁,使用盖革模式雪崩光电二极管(G-APD)和脉冲X射线照射测量。在690-1000 nm的NIR范围内,在气态Ar中测量到快组分的初级闪烁产额为17000光子/MeV,在400-1000 nm的范围内,在液态Ar中测量到510光子/MeV。在气态Ar中也观察到了成比例的近红外光谱(电致发光);在163 K时测得的放大参数为每kV每个漂移电子13个光子。讨论了近红外光谱在高能物理实验中的可能应用。

英文摘要:

The study of primary and secondary scintillations in noble gases and liquids is of paramount importance to rare-event experiments using noble gas media. In the present work, the scintillation yield in gaseous and liquid Ar has for the first time been measured in the near infrared (NIR) and visible region, both for primary and secondary (proportional) scintillations, using Geiger-mode avalanche photodiodes (G-APDs) and pulsed X-ray irradiation. The primary scintillation yield of the fast component was measured to be 17000 photon/MeV in gaseous Ar in the NIR, in the range of 690-1000 nm, and 510 photon/MeV in liquid Ar, in the range of 400-1000 nm. Proportional NIR scintillations (electroluminescence) in gaseous Ar have been also observed; their amplification parameter at 163 K was measured to be 13 photons per drifting electron per kV. Possible applications of NIR scintillations in high energy physics experiments are discussed.

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