A high performance distillation system to remove krypton from xenon was constructed, and a purity level of Kr/Xe = ∼3×10−12 was achieved. This development is crucial in facilitating high sensitivity low background experiments such as the search for dark matter in the universe.
@article{arxiv.0809.4413,
title = {Distillation of Liquid Xenon to Remove Krypton},
author = {K. Abe and J. Hosaka and T. Iida and M. Ikeda and K. Kobayashi and Y. Koshio and A. Minamino and M. Miura and S. Moriyama and M. Nakahata and Y. Nakajima and T. Namba and H. Ogawa and H. Sekiya and M. Shiozawa and Y. Suzuki and A. Takeda and Y. Takeuchi and K. Ueshima and M. Yamashita and K. Kaneyuki and Y. Ebizuka and J. Kikuchi and A. Ota and S. Suzuki and T. Takahashi and H. Hagiwara and T. Kamei and K. Miyamoto and T. Nagase and S. Nakamura and Y. Ozaki and T. Sato and Y. Fukuda and T. Sato and K. Nishijima and M. Sakurai and T. Maruyama and D. Motoki and Y. Itow and H. Ohsumi and S. Tasaka and S. B. Kim and Y. D. Kim and J. I. Lee and S. H. Moon and Y. Urakawa and M. Uchino and Y. Kamioka},
journal= {arXiv preprint arXiv:0809.4413},
year = {2015}
}