Experimental evidence on the ground-state energy of 229Pa A.I. Levon, J. de Boer, M. Loewe, M. Würkner, T. Czosnyka, J. Iwanicki and P.J. Napiorkowski Eur. Phys. J. A, 2 1 (1998) 9-11 Published online: 15 May 1998 DOI: 10.1007/s100500050083