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Ar and Kr concentrations in nitrogen as a measure of the Ar-39 and Kr-85 activities in connection with the solar neutrino experiment BOREXINO

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Zuzel,  Grzegorz
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Simgen,  Hardy
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Heusser,  Gerd
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Citation

Zuzel, G., Simgen, H., & Heusser, G. (2004). Ar and Kr concentrations in nitrogen as a measure of the Ar-39 and Kr-85 activities in connection with the solar neutrino experiment BOREXINO. Low Level Radionuclide Measurement Techniques - ICRM, 197-201. Retrieved from http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TJ0-4C829JX-2&_user=41881&_handle=B-WA-A-W-CE-MsSAYWA-UUA-AAUDVWWWDE-AAUCUUBUDE-YBZWYDAZY-CE-U&_fmt=summary&_coverDate=09%2F30%2F2004&_rdoc=20&_orig=browse&_srch=%23toc%235296%232004%23999389997%23503762!&_cdi=5296&view=c&_acct=C000002578&_version=1&_urlVersion=0&_userid=41881&md5=6fd6705c7b4d7123d709d34fd50c8e32.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-8B84-B
Abstract
Among other radionuclides, 39Ar and 85Kr are potential background sources in the solar neutrino detector Borexino. The expected low event rate requires that the nitrogen used in the experiment needs to have lower concentrations than 0.5 microBq/m3 for 39Ar and 0.2 microBq/m3 for 85Kr, corresponding to volume concentrations in N2 of 0.4E−6 m3/m3 for Ar and 0.2E-12 m3/m3 for Kr. Applying gas mass spectrometry and special care in the sampling technique we succeeded in finding the required purity. In addition, we studied the possibility to purify nitrogen from Kr by the adsorption method.