Accelerated alpha-decay of uranium isotopes induced by exposure of aqueous solution of uranium salt with gold nanoparticles to laser radiation |
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Authors: | A V Simakin G A Shafeev |
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Institution: | 14180. Wave Research Center, Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia
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Abstract: | Laser-induced accelerated alpha-decay of 232U nuclei under laser exposure of Au nanoparticles in aqueous solutions of uranium salt has been experimentally studied. It is demonstrated that the decrease in the alpha-activity depends strongly on the peak intensity of laser radiation in the liquid and reaches a maximum at 1012–1013Wcm?2. The decrease in the alpha-activity of the exposed solutions is accompanied by deviation of gamma-activities of daughter nuclides of 232U from their equilibrium values. Experimental data on the accelerated alpha-decay of 238U under similar experimental conditions are also presented. Possible mechanisms of laser effect on the alpha-activity are discussed in terms of the amplification of the electric field of laser wave on metallic nanoparticles. |
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