IL NUOVO CIMENTO VOL. 101 A, N. 6 Giugno 1989 Experimental Evidence of Cold Nuclear Fusion in a Measurement under the Gran Sasso Massif. A. BERTIN, M. BRUSCHI, M. CAPPONI, S. DE CASTRO U. MARCONI, C. MORONI, M. PICCININI, N. SEMPRINI-CESARI A. TROMBINI, A. VITALE and A. ZOCCOLI Dipartimento di Fisica dell'Universita - Bologna Istituto Nazionale di Fisica Nucleate - Sezione di Bologna S. E. JONES, J. B. CZIRR, G. L. JENSEN and E. P. PALMER Department of Physics, Brigham Young University - Provo, UT 84602 (ricevuto il 29 Aprile 1989) Summary. -- We have observed the emission of 2.5 MeV neutrons following the electrolytic infusion of deuterons into titanium electrodes. The present results were obtained by n-,f discriminating proton-recoil detectors at the Gran Sasso Laboratory. The observed neutron emission rate is comparable in size to the one recently reported by Jones and coll. PACS 25.88 - Fusion reactions. I. - Introduction. In a recent experiment, Jones et al. (9 detected the neutrons emitted following the electrolytic infusion of deuterons into Ti (and Pd) electrodes. The 2.5 MeV neutron energy, which was measured by a sensitive spectrometer, is characteristic of the nuclear fusion reaction (I) d+d~aHe+n+3.3MeV. The observation was then attributed to the catalysis of such a process, occurring (') S. E. JONES, E. P. PALMER, J. B. CZIRR, D. L. DECKER, G. L. JENSEN, J. M. THORNE, S. F. TAYLOR and J. RAFELSKI: Nature {to be published). 997