Decelerated molecular beams for high-resolution spectroscopy - The hyperfine structure of 15ND3 J. van Veldhoven, J. Küpper, H. L. Bethlem, B. Sartakov, A. J.A. van Roij and G. Meijer Eur. Phys. J. D, 31 2 (2004) 337-349 Published online: 23 November 2004 DOI: 10.1140/epjd/e2004-00160-9