Stefano Veronesi

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We report evidence of photon emission in three experiments with hydrogen loading of Ni slabs, during the degassing phase, when hydrogen was introduced into the cell, and during thermal cycling. In the first experiment we obtained excess power of about 20 W, while in the second experiment photon emission was observed instead of power production. In the third(More)
The synthesis and spectroscopic investigation of Pr(3+):YF(3) nanoparticles with nominal concentration between 0.05% and 5 at% Pr(3+) are reported. Pr(3+) emission in the visible range of the spectrum is investigated at room temperature and at 10 K as well as time resolved spectroscopy as a function of Pr(3+) concentration. The upconverted emission from the(More)
Cardiac conducting tissue antibodies (CCTA) were detected, using indirect immunofluorescence, in 8 (25%) out of 32 sera from patients with progressive systemic sclerosis (PSS) and in 39 (35%) out of 110 with rheumatoid arthritis (RA). Conduction abnormalities, namely right bundle branch block, were present in 19 (59%) of the PSS patients and in 37 (32%) of(More)
Sera from 7 patients with localized and 35 with systemic scleroderma were studied for the presence of fluorescent antinuclear antibodies (FANA) (by indirect immunofluorescence on HEp-2 cells) and antibodies to extractable nuclear antigens (anti-ENA) (by immunodiffusion - ID - and counterimmunoelectrophoresis - CIE). In localized disease, antinuclear(More)
We demonstrate efficient continuous-wave (CW) and passively Q-switched Tm:LiLuF(4) laser operation near 1.9 μm. The CW slope efficiency reached 54.8% with respect to absorbed power. Stable passive Q-switching with Cr(2+):ZnS saturable absorbers resulted in minimum pulse duration of 7.6 ns and maximum pulse energy and peak power of 1.26 mJ and 166 kW,(More)
Stable passive Q-switching of a Tm:  LiYF4 laser is obtained using polycrystalline Cr2+:  ZnS as a saturable absorber. The achieved maximum pulse energy of 0.9 mJ and peak power of 65 kW for a pulse duration of ∼14  ns represent substantial improvement and highest values for a passively Q-switched diode-pumped Tm laser operating at ∼1.9  μm.
In a previous paper [1] some of us reported on the existence of an anomalous heat production observed in hydrogen-loaded nickel rods. The phenomenon occurs when a cell containing a nickel rod is maintained at temperatures above a critical value and is filled with gaseous H2 at subatmospheric pressures. A constant input power was used to raise and keep the(More)
The results obtained in several experiments on Ni-H system are presented here. Photon emission during the preliminary phases of activation and H isotope absorption are shown; their correlation with the kind of surfaces (Ni and its alloys) and with neutron and other particle emission in the excitation progress and in large heat production is also presented.(More)
E. Campari, S. Focardi, V. Gabbani, V. Montalbano, F. Piantelli, S. Veronesi * Dipartimento di fisica, Università di Bologna–Centro I.M.O. ** Dipartimento di fisica, Università di Siena–Centro I.M.O. + I.N.F.M.–UdR Siena We present a surface analysis of nickel alloy rods loaded with hydrogen. By comparing these with a blank (unused) metal rod, morphological(More)