Factors affecting improvement of fluorescence intensity of quartet and doublet state of NO diatomic molecule excited by glow discharge

doi:10.1088/1674-1056/27/8/085202

中国物理B ›› 2018, Vol. 27 ›› Issue (8): 85202-085202.doi: 10.1088/1674-1056/27/8/085202

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

Factors affecting improvement of fluorescence intensity of quartet and doublet state of NO diatomic molecule excited by glow discharge

Ahmed Asaad I Khalil, Reem Al-Tuwirqi, Mohammed A Gondal, Noura Al-Suliman

1 Department of Laser Sciences and Interactions, National Institute of Laser Enhanced Sciences(NILES), Cairo University, Giza, 12613 Egypt;
2 Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21551, Saudi Arabia;
3 Department of Physics, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia;
4 Department of Physics, Faculty of Science for Girls, Imam Abdulrahman Ben Faisal University, Dammam 31441, Saudi Arabia

收稿日期:2018-04-09 修回日期:2018-05-18 出版日期:2018-08-05 发布日期:2018-08-05
通讯作者: Ahmed Asaad I Khalil E-mail:Ahmedasaad68@yahoo.com,Ahmedasaad@niles.edu.eg
基金资助:
Project supported by the Funds from Laser Sciences and Interactions Department, National Institute of Laser Enhanced Sciences (NILES), Cairo University, Giza, Egypt; the Fund from the Department of Physics, Faculty of Science for Girls, Imam Abdulrahman Ben Faisal University (x-Dammam University), the Fund from Dammam 31441, Saudi Arabia, and the Physics Department of King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia.

Factors affecting improvement of fluorescence intensity of quartet and doublet state of NO diatomic molecule excited by glow discharge

Ahmed Asaad I Khalil^1,4, Reem Al-Tuwirqi², Mohammed A Gondal³, Noura Al-Suliman⁴

1 Department of Laser Sciences and Interactions, National Institute of Laser Enhanced Sciences(NILES), Cairo University, Giza, 12613 Egypt;
2 Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21551, Saudi Arabia;
3 Department of Physics, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia;
4 Department of Physics, Faculty of Science for Girls, Imam Abdulrahman Ben Faisal University, Dammam 31441, Saudi Arabia

Received:2018-04-09 Revised:2018-05-18 Online:2018-08-05 Published:2018-08-05
Contact: Ahmed Asaad I Khalil E-mail:Ahmedasaad68@yahoo.com,Ahmedasaad@niles.edu.eg
Supported by:
Project supported by the Funds from Laser Sciences and Interactions Department, National Institute of Laser Enhanced Sciences (NILES), Cairo University, Giza, Egypt; the Fund from the Department of Physics, Faculty of Science for Girls, Imam Abdulrahman Ben Faisal University (x-Dammam University), the Fund from Dammam 31441, Saudi Arabia, and the Physics Department of King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia.

摘要/Abstract

摘要：

We report on the observation of new fluorescence emission spectral transitions obtained from NO diatomic molecule in the region from ultraviolet (UV) to near infrared (NIR) in a low power glow discharge system. This glow discharge electronic excitation populates different quartet and doublet states of NO in its proximity such as the A²Σ (υ=2), b⁴Σ^- (υ=3), B²Π (υ=4), and X²Π (υ=33-32) states. Due to inter-system crossing, emission lines originating from these levels to lower lying states are recorded and spectral line assignments are performed. The observed systems include b⁴Σ^--a⁴Π, B²Π-a⁴Π, a⁴Π-X²Π, A²Σ-X²Π, X²Π-X²Π (33-15), X²Π-X²Π (33-17), X²Π-X²Π (33-20), and X²Π-X²Π (33-18). This new information will conduce to the better understanding of the interesting features of NO molecule. Such parameters that affect the recording of low density of NO molecules are also discussed In addition to the factors such as the time evolution, argon gas concentration relative to NO mixture, the percentage of NO molecular gas concentration, discharge electric current signals and discharge applied voltage are studied. Those factors would enhance the fluorescence signal intensity of NO molecules. The recent results might be significant as reference data for optimizing the glow discharge spectrometer and diagnostics of NO gas.

关键词: fluorescence emission, NO molecule, quartet states, intersystem crossing, glow discharge

Abstract:

Key words: fluorescence emission, NO molecule, quartet states, intersystem crossing, glow discharge

中图分类号: (Laser ablation)

52.38.Mf

52.25.Jm (Ionization of plasmas) 52.25.Kn (Thermodynamics of plasmas) 42.55.Rz (Doped-insulator lasers and other solid state lasers)

Ahmed Asaad I Khalil, Reem Al-Tuwirqi, Mohammed A Gondal, Noura Al-Suliman. Factors affecting improvement of fluorescence intensity of quartet and doublet state of NO diatomic molecule excited by glow discharge[J]. 中国物理B, 2018, 27(8): 85202-085202.

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Factors affecting improvement of fluorescence intensity of quartet and doublet state of NO diatomic molecule excited by glow discharge

Factors affecting improvement of fluorescence intensity of quartet and doublet state of NO diatomic molecule excited by glow discharge

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