Method for measuring isotope ratio of uranium in single particle
An isotope ratio and particle technology, applied in the field of nuclear technology monitoring, can solve the problems of many steps, long time, poor positioning accuracy, etc., and achieve the effect of high accuracy and precision, simple and fast method, and simple method.
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Embodiment 1
[0025] A method for measuring the uranium isotope ratio in a single particle, the method comprising the steps of:
[0026] (1) After the wiping sample containing uranium particles is recovered by ultrasonic oscillation, it is transferred to a carrier sheet;
[0027] (2) The surface of the used sample stage of the LA-ICP-MS analysis instrument is pasted with a layer of double-sided silver glue, and then a copper mesh with a mark is pasted on the upper surface of the double-sided silver glue; the scanning electron microscope is used to find the step (1 ) on the carrier sheet described in ), and the micro-operating system controls the tungsten needle to transfer the single uranium particle to the double-sided silver glue in any grid of the conductive metal mesh; the thickness of the copper mesh is 20 μm, and each The size of a small grid is 100μm*100μm.
[0028] (3) The optical microscopic imaging system of the LA-ICP-MS analysis instrument repositions the particles within the g...
Embodiment 2
[0030] The method, steps and equipment used in Example 1 are the same, except that the material of the conductive metal mesh is aluminum mesh, the thickness of the aluminum mesh is 15 μm, and the size of each small grid is 90 μm*120 μm. Among them, the parameters of LA-ICP-MS are that the laser beam spot is 8 μm, the laser frequency is 12 Hz, and the laser power density is 2.0×10 8 W / cm 2 , RF power 900W.
Embodiment 3
[0032] The method, steps and equipment used in Example 1 are the same, except that the material of the conductive metal mesh is silver mesh, the thickness of the silver mesh is 20 μm, and the size of each small grid is 120 μm*120 μm. The parameters of LA-ICP-MS are that the laser beam spot is 14 μm, the laser frequency is 4 Hz, and the laser power density is 1.5×10 8 , RF power 1100W.
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