A method for measuring the density of alkali metals based on the electron polarizability of alkali metals
An electronic polarization and density measurement technology, applied in specific gravity measurement, measurement devices, instruments, etc., can solve problems such as inapplicability, accuracy limitations, deviation from fitting functions, etc., to ensure real-time and accuracy, and reduce external influences Factors, effects of simple experimental operation
Active Publication Date: 2021-10-12
BEIHANG UNIV
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Problems solved by technology
For alkali metals with relatively large optical thickness, the absorption spectrum will be distorted near resonance and deviate from the fitting function; the Faraday rotation method of linearly polarized light cannot be applied to the case of more than one mixed alkali metal; the empirical formula of saturated vapor pressure is limited by gas Constraints and effects of temperature gradients near the chamber and surface effects on the inner surfaces of the gas
The accuracy of current existing methods will be limited by experimental conditions, and cannot be measured accurately in real time
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[0015] Below with the accompanying drawings ( figure 1 ) and Examples illustrate the present invention.
[0016] figure 1 It is a schematic flow chart of an alkali metal density measurement method based on alkali metal electron polarizability for implementing the present invention. refer to figure 1 Shown, a kind of alkali metal density measurement method based on alkali metal electron polarizability, is characterized in that, comprises by following alkali metal electron polarizability The effective magnetic field produced by the electrons of the alkali metal Calculate the alkali metal density in the gas chamber of an atomic spin-inertial measurement device n from the relation e :
[0017]
[0018] where κ 0 is the spin exchange enhancement factor, μ 0 is the magnetic permeability in vacuum, μ e is the magnetic moment of the alkali metal atom. Measured using an atomic spin inertial measurement device to obtain the said Obtained by the following formula: In ...
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A method for measuring the density of alkali metals based on the electron polarizability of alkali metals, calculating the atomic density of alkali metals in the gas chamber of an atomic spin inertial measurement device through the relationship between the electron polarizability of alkali metals and the effective magnetic field generated by alkali metal electrons, It only needs to use the atomic spin inertial measurement device to measure the electron polarizability of the alkali metal, the magnetic field compensation point and the effective magnetic field generated by the inert gas nuclei, and calculate the effective magnetic field through the magnetic field compensation point and the effective magnetic field generated by the inert gas nuclei, The atomic density of the alkali metal can be accurately measured, the method is reasonable, and the experimental operation is simple, which provides a basis for the development of a high-precision atomic spin inertial measurement device.
Description
technical field [0001] The invention relates to the field of atomic spin inertial measurement devices, in particular to a method for measuring the density of alkali metals based on the electron polarizability of alkali metals. The density of the alkali metal in the gas chamber of the spin inertial measurement device only needs to use the atomic spin inertial measurement device to measure the electronic polarizability of the alkali metal, the magnetic field compensation point and the effective magnetic field generated by the inert gas nuclei, and pass the magnetic field compensation point and the inert gas Calculating the effective magnetic field generated by the alkali metal electrons from the effective magnetic field generated by the nuclei can accurately measure the density of the alkali metal. This method is reasonable and the experimental operation is simple, which provides a basis for the development of a high-precision atomic spin inertial measurement device. Background...
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IPC IPC(8): G01N9/00
CPCG01N9/00
Inventor 翟跃阳徐子童魏凯韩邦成刘颖
Owner BEIHANG UNIV