First hints on a change of the 22Na βdecay half-life in the metal Pd B. Limata, F. Raiola, B. Wang, S. Yan, H. W. Becker, A. D'Onofrio, L. Gialanella, V. Roca, C. Rolfs, M. Romano et al. (3 more) Eur. Phys. J. A, 28 2 (2006) 251-252 Published online: 16 June 2006 DOI: 10.1140/epja/i2006-10057-1