Free precession and transverse relaxation of hyperpolarized 129Xe gas detected by SQUIDs in ultra-low magnetic fieldsW. Kilian, A. Haller, F. Seifert, D. Grosenick and H. RinnebergEur. Phys. J. D, 42 2 (2007) 197-202DOI: https://doi.org/10.1140/epjd/e2007-00026-8