A rhenium strip processing device and method

A technology of a processing device and a processing method, which can be applied to measurement devices, instruments, scientific instruments, etc., can solve problems such as affecting measurement accuracy, and achieve the effect of improving measurement precision.

Active Publication Date: 2020-11-24
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the direct addition method will inevitably introduce the background, which will affect the accuracy of the measurement

Method used

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  • A rhenium strip processing device and method
  • A rhenium strip processing device and method
  • A rhenium strip processing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0079] The rhenium tape processing device used in the following examples is figure 2 As shown, the vacuum system includes a mechanical pump, a molecular pump, and two vacuum gauges, with ranges of about 1Pa~0.0001Pa and about 101KPa~0.1Pa, and one and two vacuum gauges are arranged in sequence between the carbon source container and the carbon source inlet. Through valve and a needle valve, benzene is used as the carbon source. The volume of the benzene container is 1L, and it contains 100-500ml benzene. There are 30 sample racks. Each sample rack is fixed with a rhenium tape to make multiple rhenium tapes fixed. Form a series.

[0080] 1) Rhenium strip degassing

[0081] Fix the rhenium tape on the sample holder, connect it to the conductive feeder, and put it into the vacuum chamber. Turn on the mechanical pump and molecular pump in turn, and monitor the vacuum degree with a vacuum gauge. When the vacuum degree in the vacuum chamber reaches about 0.005Pa, the rhenium tape is e...

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PUM

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Abstract

The invention provides a rhenium tape processing device. The device comprises a vacuum cavity, a vacuum system arranged outside the vacuum cavity and communicating with the vacuum cavity, a carbon source inlet formed in the wall of the vacuum cavity, a carbon source container arranged outside the vacuum cavity and communicating with the carbon source inlet, a conductive feed-in part arranged in the vacuum cavity, a power supply arranged outside the vacuum cavity and connected with the conductive feed-in part, and optionally, one or more sample racks arranged in the vacuum cavity and connectedwith the conductive feed-in part. The invention further provides a rhenium tape processing method.

Description

Technical field [0001] The invention relates to the field of isotope abundance ratio measurement, in particular to a rhenium tape processing device and method for thermal ionization mass spectrometry. Background technique [0002] Thermal ionization mass spectrometry (TIMS) is a method that can measure isotope abundance ratios with high accuracy. When using this method for measurement, the sample is placed on a heating wire, and the heating wire heats the sample to achieve evaporation and ionization of the sample, and then complete the measurement. Rhenium tape is the most commonly used heating wire. In order to remove impurities on the surface of the rhenium tape, the rhenium tape needs to be heated and degassed under vacuum conditions before use. [0003] When using TIMS to measure trace amounts of uranium and plutonium, the ionization efficiency of the sample can be improved by adding ionization enhancer, thereby improving the accuracy of the sample measurement. Commonly used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/62
CPCG01N27/626
Inventor 徐常昆陈彦李力力
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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