Accelerator mass spectrometer with simultaneous isotope measurement function

Abstract

The invention relates to the isotope measurement technology, in particular to an accelerator mass spectrometer with a simultaneous isotope measurement function. The accelerator mass spectrometer structurally comprises a sputter negative ion source used for generating negative ions and connected with an accelerating tube used for simultaneously accelerating a plurality of isotope ions, wherein the output end of the accelerating tube is connected with an isotope mass resolution system; the isotope mass resolution system is connected with a charge converting analysis and multi-receiving measurement system; the charge converting analysis and multi-receiving measurement system is connected with an ion detection system. The accelerator mass spectrometer can simultaneously accelerate a plurality of isotope negative ions, stable isotope negative ions in the accelerated isotope negative ions are measured by a stable isotope receiver, unstable isotope negative ions are converted into positive ions which are then measured by a detector, and measurement signals are simultaneously transmitted to a nuclear electronics and data acquisition unit after time matching for data operation. The accelerator mass spectrometer is simple in structure, convenient to operate and maintain and high in measuring accuracy.

Description

technical field [0001] The invention relates to isotope measurement technology, in particular to an accelerator mass spectrometer with simultaneous isotope measurement function. Background technique [0002] Accelerator Mass Spectrometry (AMS) is a high-energy isotope mass spectrometer based on accelerator technology and ion detector technology, mainly used for the measurement of isotope abundance ratio. Due to the existence of the accelerator, the current AMS adopts the analysis method of isotope acceleration and measurement alternately. Due to the use of accelerators and detectors, AMS has the ability to exclude molecular ion backgrounds and isobaric ion backgrounds, thereby greatly improving the analytical sensitivity, and its isotope abundance sensitivity can reach 1x10 -15 . Due to the interference of molecular ion background and isobaric ion background, the isotopic abundance sensitivity of traditional mass spectrometry (Mass Spectrometry, hereinafter referred to as ...

AI Technical Summary

Problems solved by technology

[0007] Due to the alternating measurement of isotopes, AMS has two main problems. First, the measurement accuracy is not high enough, generally around 1%-3%. Second, the instrument system is complex. Compared with traditional MS, there are more Out of injection magnet and alternate injection power supply and control system

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