Eur. Phys. J. A (2006) 28: 251-252
https://doi.org/10.1140/epja/i2006-10057-1

Nuclear Astrophysics

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

¹ 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

^* e-mail: rolfs@ep3.rub.de

Received: 8 April 2006
Accepted: 5 June 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.