A method for measuring the second excitation potential of argon atom

Abstract

The invention provides a method for measuring the second excitation potential of an argon atom, which is mainly carried out by dividing the electron acceleration and the collision between the electron and the argon atom into two regions, and dividing the first grid G 1 and the second gate G 2 The connection remains at the same potential, using the plate current I P With the accelerating voltage V 1 The change curve of I P ~V 1 , to determine the corresponding second excitation potential U during the excitation of argon atoms in the presence of contact voltage and space charge 2 ′ and the first excitation potential U 1 ’ potential difference ΔU, and then use the difference between the two to eliminate the influence of contact voltage and space charge, and obtain the second excitation potential U of the argon atom 2 and the first excitation potential U 1 The potential difference ΔU, combined with the first excitation potential U of the argon atom measured by the conventional method 1 , to determine the second excitation potential U of the argon atom 2 =U 1 +ΔU, the invention realizes the measurement of the high excitation potential of the argon atom from the ground state excitation to the second excited state, which provides important reference significance for the research on the high excitation potential of the argon atom, and the measurement equipment is relatively simple without high cost investment. And the measurement results are accurate and reliable.

Description

technical field [0001] The invention belongs to the technical field of physics, specifically the technical fields of atomic and molecular physics and quantum mechanics, and particularly relates to a method for measuring the second excitation potential of an argon atom. Background technique [0002] The internal energy of atoms is quantized, and the measurement of atomic energy levels is the key to understanding the internal structure of atoms. Atoms can change their state by absorbing (or emitting) electromagnetic radiation or colliding with other particles to exchange energy. In order to achieve the atom from the ground state E 1 Excited to excited state E n , can be realized by absorbing photons of a certain frequency ν, for which hν=E n -E 1 , where h=6.626176×10 -34 (J·s) is Planck's constant. It can also be achieved by colliding with electrons with a certain energy. If the colliding electrons obtain energy eU through the accelerating voltage U, as long as eU=E n...

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to obtain high-energy electrons, and it is difficult to observe the higher excitation potential of argon atoms, and there are relatively few studies on the measurement of higher excitation potentials of argon atoms.

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