Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Novel method for analyzing isotope ratio of fissile nuclide particles by virtue of FT-TIMS (fission track-thermal ionization mass spectrometry)

A FT-TIMS, fissile nuclide technology, applied in the field of new FT-TIMS analysis of fissile nuclide particle isotope ratio, can solve the problems of reduced ashing speed of test samples, agglomeration and loss of particles to be tested, and achieve Not easy to lose particles, not easy to lose, high recovery efficiency

Active Publication Date: 2014-04-16
CHINA INSTITUTE OF ATOMIC ENERGY
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has limited separation of the particles to be tested from the carrier, and the effect is still not obvious even if the shaking time is prolonged; the ashing method puts the quartz beaker containing the wiped sample into the muffle furnace, and performs ashing in an appropriate range. However, if it is ashed at a higher temperature, the particles to be tested in the test sample will be seriously agglomerated. If it is changed to ashing at the bottom temperature, the ashing speed of the test sample will be greatly reduced; the combustion separation method is fast, and the carrier There are few residues, and the particles to be tested can be uniformly dispersed by the inert solvent, but a small amount of the particles to be tested will be lost at the temperature of the carrier flame

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel method for analyzing isotope ratio of fissile nuclide particles by virtue of FT-TIMS (fission track-thermal ionization mass spectrometry)
  • Novel method for analyzing isotope ratio of fissile nuclide particles by virtue of FT-TIMS (fission track-thermal ionization mass spectrometry)
  • Novel method for analyzing isotope ratio of fissile nuclide particles by virtue of FT-TIMS (fission track-thermal ionization mass spectrometry)

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0060] First embodiment: self-made monodisperse uranium particles with a particle size of 2 μm and a 235U (uranium 235) abundance of 35% were used as a simulated wiping sample in the experiment. Cut a small piece of nuclear pore membrane loaded with the prepared microparticles and add it to 5 mL of isoamyl acetate solution, and vibrate ultrasonically for 20 minutes. Pipette this solution into 4mL collodion solution (the volume ratio of collodion to isoamyl acetate is 0.8:1), and mix well. The mixed solution was prepared as image 3 The irradiated samples are shown.

[0061] In the irradiated sample, the upper collodion layer 134 has a thickness of 20 μm, the central collodion layer 132 has a thickness of 20 μm, and the lower collodion layer 133 has a thickness of 20 μm.

[0062] Put the sample into the tunnel of light water reactor and irradiate for 28 hours, the neutron fluence rate is 9×10 10 n·cm -2 ·s -1 . Put the irradiated sample into 6mol L -1 After etching in Na...

no. 2 example

[0065] Second embodiment: the second embodiment is substantially the same as the first embodiment, the difference is that the thickness of the upper collodion layer 134 of the irradiated sample is 15 μm, and the thickness of the central collodion layer 132 is 30 μm , the thickness of the lower collodion layer 133 is 15 μm.

no. 3 example

[0066] The third embodiment: the third embodiment is substantially the same as the first embodiment, the difference is that the thickness of the upper collodion layer 134 (or the lower collodion layer 133) of the irradiated sample is 15 μm, and the The thickness of the central collodion layer 132 is 20 μm, and the thickness of the lower layer collodion layer 133 (or the upper layer collodion layer 134 ) is 25 μm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a novel method for analyzing the isotope ratio of fissile nuclide particles by virtue of FT-TIMS (fission track-thermal ionization mass spectrometry). The method is characterized by comprising the following steps of processing nuclide particles to be detected to prepare an irradiation sample; irradiating the irradiation sample; etching the irradiation sample which is irradiated; performing sample preparation and measurement on the irradiation sample which is etched. Compared with the prior art, the method has the benefits that an operating process is simple, the particles are difficult to lose in an etching process, fission tracks on two detectors can be mutually verified to reduce the missing rate of the particles, and the particles are difficult to lose in a transfer process; furthermore, the recovery rate of the particles to be detected is high, and the recovery efficiency of the method is higher than that of a conventional recovery mode.

Description

technical field [0001] The invention relates to an isotope ratio analysis method, in particular to a new FT-TIMS method for analyzing the isotope ratio of fissile nuclide particles. Background technique [0002] The isotope ratio of an element is the ratio of the abundance of each isotope in the element. The ratio of the atomic abundance of heavy isotopes to the atomic abundance of light isotopes of the element. Because the isotope ratio is difficult to measure accurately, and the isotope ratio is only an important basis for determining the relevant information of the ore, the analysis method of the isotope ratio is one of the focuses of researchers at present. In the prior art, the combination of fission track (FT) screening of hot particles and thermal surface ionization mass spectrometry (TIMS) measurement is a recognized technical route for particle isotope analysis. Scholars at home and abroad mainly use polycarbonate or mica as fission track detectors, disperse the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N27/62G01N1/44G01N27/626
Inventor 陈彦赵永刚李力力王凡常志远
Owner CHINA INSTITUTE OF ATOMIC ENERGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com