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Initiation of nuclear reactions under laser irradiation of Au nanoparticles in the aqueous solution of Uranium salt

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Abstract

Laser exposure of a suspension of either gold or palladium nanoparticles in aqueous solutions of UO2Cl2 of natural isotope abundance was experimentally studied. Picosecond Nd:YAG lasers at peak power of 1011–1013 W/cm2 at the wavelength of 1.06–0.355 μm were used as well as a visible-range Cu vapor laser at a peak power of 1010 W/cm2. The composition of colloidal solutions before and after laser exposure was analyzed using atomic absorption and gamma spectroscopy in the 0.06–1 MeV range of photon energy. Real-time gamma spectroscopy was used to characterize the kinetics of nuclear reactions during laser exposure. It was found that laser exposure initiated nuclear reactions involving both 238U and 235U nuclei via different channels in H2O and D2O. The influence of saturation of both the liquid and nanoparticles by gaseous H2 and D2 on the kinetics of nuclear transformations was found. Possible mechanisms of observed processes are discussed.

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  1. Wave Research Center of A.M. Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilov street, 119991, Moscow, Russian Federation

    A. V. Simakin & G. A. Shafeev

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  1. A. V. Simakin
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  2. G. A. Shafeev
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Correspondence to G. A. Shafeev.

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Simakin, A.V., Shafeev, G.A. Initiation of nuclear reactions under laser irradiation of Au nanoparticles in the aqueous solution of Uranium salt. Appl. Phys. A 101, 199–203 (2010). https://doi.org/10.1007/s00339-010-5784-z

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  • DOI: https://doi.org/10.1007/s00339-010-5784-z

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