Discussion on the intensity ratio of sodium
doublet in sodium atom spectroscopy experiment

TAN Zhi-yang, CHEN Sen, WU Ping

doi:10.16854 /j.cnki.1000-0712.180448

College Physics >

2019 , Vol. 38 >Issue 5: 63

DOI: https://doi.org/10.16854 /j.cnki.1000-0712.180448

Discussion on the intensity ratio of sodium doublet in sodium atom spectroscopy experiment

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1. School of Physics and Mathematics，University of Science and Technology，Beijing 100083，China; 2. Basic Experimental Center for Natural Science，University of Science and Technology Beijing，Beijing 100083，China

Received date: 2018-07-28

Revised date: 2018-12-03

Online published: 2019-06-13

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Abstract

By analyzing the working mechanism of the low-pressure sodium lamp，it is found that the plasma in

the low pressure sodium lamp is in non-local thermal equilibrium state. Therefore，this paper uses the corona model

suitable for non-isothermal plasma to calculate the intensity ratio of sodium doublet in the sodium atom spectroscopy

experiment. The calculated results agree well with the experimental results，with a five percent error，which gives a

good explanation for the experimental phenomenon.

Key words： low-pressure sodium lamp; line intensity; non-isothermal plasma; coronal mode

Cite this article

TAN Zhi-yang, CHEN Sen, WU Ping . Discussion on the intensity ratio of sodium doublet in sodium atom spectroscopy experiment[J]. College Physics, 2019 , 38(5) : 63 . DOI: 10.16854 /j.cnki.1000-0712.180448

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