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Accelerator mass spectrometry carbon-14 dating and sampling device

An accelerator mass spectrometry and carbon 14 technology, which is applied in the field of accelerator mass spectrometry carbon 14 dating and sample preparation devices, can solve problems such as differences in sample preparation efficiency, graphite performance, etc., so as to reduce the sample preparation work intensity, the structure is stable, and the system construction is reduced. cost effect

Active Publication Date: 2009-06-03
PEKING UNIV
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Problems solved by technology

However, due to the difference between the sample preparation device and the sample preparation process, there are certain differences in the sample preparation efficiency and the properties of the synthesized graphite.

Method used

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  • Accelerator mass spectrometry carbon-14 dating and sampling device
  • Accelerator mass spectrometry carbon-14 dating and sampling device
  • Accelerator mass spectrometry carbon-14 dating and sampling device

Examples

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Embodiment Construction

[0037] The following specific examples help to understand the characteristics and advantages of the present invention, but the implementation of the present invention is by no means limited to the described examples.

[0038] refer to figure 1 , the whole sample preparation process is divided into CO 2 There are two stages of generation and purification and graphite synthesis, and the corresponding sample preparation device includes CO 2 There are two parts: generation and purification, and graphite synthesis. Since the entire sample preparation process needs to be carried out under a pollution-free vacuum condition, the preparation device must be equipped with a vacuum maintenance system. The work tasks of the two stages are different, CO 2 Different degrees of gas cleanliness have different requirements for system vacuum and device structure, so the two sample preparation stages can be designed as two independent operations, and can be equipped with different vacuum maint...

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Abstract

The invention discloses an accelerator mass spectrometry carbon-14 dating and sampling device, and belongs to the technical field of radiocarbon (<14>C) dating. The device comprises a CO2 generation and purification apparatus and a graphite synthesis apparatus, wherein, a reactor of the CO2 generation and purification apparatus comprises a vacuum joint, a quartz tube, a quartz tube cutter, an air bottle and a ball valve; the vacuum joint is provided with four interfaces, the upper interface is connected with the ball valve, the rear interface is connected with a pressure sensor, the front interface is movably connected with the air bottle, the lower interface is connected with the quartz tube or the quartz tube cutter; and the reactor of the graphite synthesis apparatus comprises the two quartz tubes, a vacuum joint and a ball valve, the vacuum joint is also provided with four interfaces, wherein, the upper interface is connected with the ball valve, the rear interface is connected with a pressure sensor, and the lower interface and the front interface are respectively connected with two quartz tubes. The device is applicable to preparing a small graphite target sample, and the obtained target material has excellent performance.

Description

technical field [0001] The present invention belongs to radiocarbon (carbon fourteen, 14 C) The technical field of dating, especially relates to a sample preparation device for accelerator mass spectrometry carbon fourteenth dating. Background technique [0002] Radiocarbon (C14, 14 C) The dating method is the dating method created by W.F.Libby in the late 1940s, 14 After more than 50 years of development, the C dating method has become one of the most widely used dating methods in the scientific community. 14 The outstanding advantages of C dating are high measurement accuracy, a wide variety of measurable samples, and good data reliability. The upper limit of its dating is generally 40-60ka, which is shorter than some other dating methods. But this period of time is a critical period of human evolution, and it is also a hot period in the study of global change and paleoenvironment. [0003] along with 14 Wide application of C dating methods, 14 With the development ...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N27/64
Inventor 吴小红陈建立胡钢潘岩蒙清平杨颖亮高世君
Owner PEKING UNIV
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