Eur. Phys. J. A 28, 251-252 (2006)
DOI: 10.1140/epja/i2006-10057-1

First hints on a change of the ²²Na βdecay half-life in the metal Pd

B. Limata^{1, 2}, F. Raiola³, B. Wang⁴, S. Yan⁴, H. W. Becker⁵, A. D'Onofrio^{1, 2}, L. Gialanella^{2, 6}, V. Roca^{2, 6}, C. Rolfs³, M. Romano^{2, 6}, D. Schürmann³, F. Strieder³ and F. Terrasi<sup>1, 2

1</sup>  Dipartimento di Scienze Ambientali, Seconda Università di Napoli, Caserta, Italy
²  INFN, Napoli, Italy
³  Experimentalphysik III, Ruhr-Universität Bochum, Bochum, Germany
⁴  China Institute of Atomic Energy, Beijing, PRC
⁵  Dynamitron-Tandem-Laboratorium, Ruhr-Universität Bochum, Bochum, Germany
⁶  Dipartimento di Scienze Fisiche, Università Federico II, Napoli, Italy

rolfs@ep3.rub.de

(Received 8 April 2006 / Published online 16 June 2006)

Abstract

For the β⁺-decay of ²²Na in the metallic environment Pd cooled to T = 12 K the ²²Na half-life was observed to be shorter by 1.2±0.2%. The result is consistent with --but lower than-- the prediction of the Debye plasma model.

Key words: 26.20.+f Hydrostatic stellar nucleosynthesis -- 27.30.+t 20 <= A <= 38 -- 21.10.Tg Lifetimes

Correspondence: rolfs@ep3.rub.de

Communicated by R. Krücken

© Società Italiana di Fisica, Springer-Verlag 2006