A scintillator purification system for a large scale solar neutrino experiment

Autor:	N. Darnton, M. Chen, R. Loeser, Michael Johnson, Jay Burton Benziger, Frank Calaprice, R. B. Vogelaar
Rok vydání:	1998
Předmět:	Physics Nuclear and High Energy Physics Stripping (chemistry) Physics::Instrumentation and Detectors Vacuum distillation Liquid scintillation counting Detector Analytical chemistry Scintillator law.invention Ion Nuclear physics law Impurity High Energy Physics::Experiment Instrumentation Filtration
Zdroj:	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 417:278-296
ISSN:	0168-9002
DOI:	10.1016/s0168-9002(98)00767-0
Popis:	An on-line purification system for a large-scale low-background liquid scintillation detector has been tested with the 5 t liquid scintillation detector, the Counting Test Facility at Gran Sasso. Counter-current water extraction removes polar and charged impurities such as ions and metal salts. Vacuum distillation of the entire scintillator has been applied to remove both radioactive impurities and chemical impurities that affect the optical properties of the scintillator. Filtration with a 0.05 μm particulate filter removed suspended dust particles that may contain U, Th and K. Nitrogen stripping was employed to remove dissolved water and noble gases (e.g. 85 Kr) from the scintillator. The system has effectively reduced the internal back in the 5 t liquid scintillation detector from 470±90 events/d to the detection limit of the detector (±45 events/d) in the energy window 250 E
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e0221214976cc6ec0fcd3096755db031 https://doi.org/10.1016/s0168-9002(98)00767-0 Zobrazit plný text záznamu Full Text from ScienceDirect