NaI(Tl) crystal scintillator encapsulated in two organic-scintillator layers with pulse shape data analysis
- Authors
- Kim, Jinyoung; Lee, Yujin; Koh, Byoung-cheol; Ha, Chang Hyon; Park, Byung Ju; Lee, In Soo; Lee, Hyun Su
- Issue Date
- Nov-2022
- Publisher
- Korean Physical Society
- Keywords
- Crystal scintillator; Organic scintillator; Phoswich detector; WIMP
- Citation
- Journal of the Korean Physical Society, v.81, no.9, pp 826 - 833
- Pages
- 8
- Journal Title
- Journal of the Korean Physical Society
- Volume
- 81
- Number
- 9
- Start Page
- 826
- End Page
- 833
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/61168
- DOI
- 10.1007/s40042-022-00620-w
- ISSN
- 0374-4884
1976-8524
- Abstract
- Thallium-doped sodium iodide (NaI(Tl)) crystals are widely used in radiation detection applications, from gamma-ray spectroscopy to particle dark matter searches. However, if the crystal is exposed to relative humidity of even a few percent, its light emission degrades, making the crystal impractical as a detector. Surrounding the crystal with organic scintillators not only protects the surface of the crystal from humid air but also offers a new capability to tag backgrounds such as external gamma rays and surface contaminations. We developed a detector that is constructed by fully encasing a NaI(Tl) crystal in a plastic scintillator and then immersing the plastic–crystal assembly in liquid scintillator. Using data collected from this triple phoswich detector, a pulse shape analysis is able to identify the various radiation signals from the three scintillators. Additionally, we find that the crystal’s emission quality is maintained for a month. © 2022, The Korean Physical Society.
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