Emission Spectra of Molecular Gases N2 and CO2 in the Range of 3–20 nm upon Pulsed Laser Excitation of Various Gas-Jet Targets

2021 ◽  
Author(s):  
A. N. Nechai ◽  
A. A. Perekalov ◽  
N. I. Chkhalo ◽  
N. N. Salashchenko
Keyword(s):  
Laser Excitation ◽  
Pulsed Laser ◽  
Emission Spectra ◽  
Gas Jet ◽  
Molecular Gases ◽  
20 Nm

Emission Spectra of Light Inert Gases Ne and Ar in the 3–20 nm Range under Pulsed Laser Excitation Using Various Gas Jets as Targets

2021 ◽  
Vol 129 (2) ◽  
pp. 185-190
Author(s):  
A. N. Nechay ◽  
A. A. Perekalov ◽  
N. N. Salashchenko ◽  
N. I. Chkhalo
Keyword(s):  
Laser Excitation ◽  
Pulsed Laser ◽  
Emission Spectra ◽  
Inert Gases ◽  
Gas Jets ◽  
20 Nm ◽  
Nm Range

scholarly journals Эмиссионные спектры тяжелых инертных газов Kr, Xe в диапазоне 3-20 nm при импульсном лазерном возбуждении с использованием различных газовых струй в качестве мишеней

2021 ◽  
Vol 129 (3) ◽  
pp. 266
Author(s):  
А.Н. Нечай ◽  
А.А. Перекалов ◽  
Н.Н. Салащенко ◽  
Н.И. Чхало
Keyword(s):  
Laser Radiation ◽  
Spectral Range ◽  
Particle Concentration ◽  
Pulsed Laser ◽  
Emission Spectra ◽  
Gas Jet ◽  
Pulsed Laser Radiation ◽  
Laser Spark ◽  
Gas Targets ◽  
20 Nm

The article considers the results of studies of the emission spectra of Kr, Xe upon excitation by pulsed laser radiation. We used Nd: YAG laser, λ = 1064 nm, τ = 5 ns, and Epulse = 0.8 J. The spectral range of 30-200A was studied. We used capillary with d = 500 μm and supersonic conical nozzles with dcr = 145 μm, 2α = 12o, L = 5 mm, and dcrit = 450 μm, 2α = 11o, L = 5 mm to form a gas jet. The emission spectra for various gas targets were obtained, the obtained spectra were deciphered, and the ions emitting in this spectral range were determined. We observed that with increasing particle concentration in the zone of laser spark, the radiation intensity increases. In this case, the intensity of ion lines with high degrees of ionization increases faster.

scholarly journals Эмиссионные спектры легких инертных газов Ne и Ar в диапазоне 3-20 nm при импульсном лазерном возбуждении с использованием различных газовых струй в качестве мишеней

2021 ◽  
Vol 129 (2) ◽  
pp. 146
Author(s):  
А.Н. Нечай ◽  
А.А. Перекалов ◽  
Н.Н. Салащенко ◽  
Н.И. Чхало
Keyword(s):  
Spectral Range ◽  
Particle Concentration ◽  
Pulsed Laser ◽  
Emission Spectra ◽  
Cluster Beam ◽  
Atomic Cluster ◽  
Pulsed Laser Radiation ◽  
Laser Spark ◽  
Gas Targets ◽  
20 Nm

The article considers the results of studies of the emission spectra of Ne and Ar upon excitation by pulsed laser radiation. We used Nd: YAG laser, λ = 1064 nm, τ = 5 ns, and Epulse = 0.8 J. The spectral range of 3-20 nm was studied. We used capillary and supersonic conical nozzles with dcr = 145 μm, 2α = 12o, L = 5 mm, and dcr = 450 μm, 2α = 11o, L = 5 mm to form an atomic cluster beam. The emission spectra for various gas targets were obtained, the obtained spectra were deciphered, and the ions emitting in this spectral range were determined. We observed that with increasing particle concentration in the zone of laser spark, the radiation intensity increases. In this case, the intensity of ion lines with high degrees of ionization increases faster.

scholarly journals Эмиссионные спектры молекулярных газов N-=SUB=-2-=/SUB=- и CO-=SUB=-2-=/SUB=- в диапазоне 3-20 nm при импульсном лазерном возбуждении с использованием различных газовых струй в качестве мишеней

2021 ◽  
Vol 129 (6) ◽  
pp. 755
Author(s):  
А.Н. Нечай ◽  
А.А. Перекалов ◽  
Н.И. Чхало ◽  
Н.Н. Салащенко
Keyword(s):  
Spectral Range ◽  
Particle Concentration ◽  
Pulsed Laser ◽  
Emission Spectra ◽  
Cluster Beam ◽  
Atomic Cluster ◽  
Pulsed Laser Radiation ◽  
Laser Spark ◽  
Gas Targets ◽  
20 Nm

The article considers the results of studies of the emission spectra of N2 and CO2 upon excitation by pulsed laser radiation. We used Nd: YAG laser, λ = 1064 nm, τ = 5 ns, and Epulse = 0.8 J. The spectral range of 3-20 nm was studied. We used capillary and supersonic conical nozzles with dcr = 145 μm, 2α = 12o, L = 5 mm, and dcr = 450 μm, 2α = 11o, L = 5 mm to form an atomic cluster beam. The emission spectra for various gas targets were obtained, the obtained spectra were deciphered, and the ions emitting in this spectral range were determined. We observed that with increasing particle concentration in the zone of laser spark, the radiation intensity increases. In this case, the intensity of ion lines with high degrees of ionization increases faster.

scholarly journals Эмиссионные спектры молекулярных газов CHF-=SUB=-3-=/SUB=-, CCl-=SUB=-2-=/SUB=-F-=SUB=-2-=/SUB=-, SF-=SUB=-6-=/SUB=- в диапазоне 3-20 nm при импульсном лазерном возбуждении с использованием различных газовых струй в качестве мишеней

2022 ◽  
Vol 130 (2) ◽  
pp. 217
Author(s):  
В.Е. Гусева ◽  
А.Н. Нечай ◽  
А.А. Перекалов ◽  
Н.Н. Салащенко ◽  
Н.И. Чхало
Keyword(s):  
Spectral Range ◽  
Particle Concentration ◽  
Pulsed Laser ◽  
Emission Spectra ◽  
Cluster Beam ◽  
Atomic Cluster ◽  
Pulsed Laser Radiation ◽  
Laser Spark ◽  
Gas Targets ◽  
20 Nm

The article considers the results of studies of the emission spectra of CHF3, CCl2F2, SF6 upon excitation by pulsed laser radiation. We used Nd:YAG laser, λ = 1064 nm, τ = 5 ns, and Epulse = 0.8 J. The spectral range of 3-20 nm was studied. We used capillary and supersonic conical nozzles with dcrit = 145 μm, 2α = 12o, L = 5 mm, and dcrit = 450 μm, 2α = 11o, L = 5 mm to form an atomic cluster beam. The emission spectra for various gas targets were obtained, the obtained spectra were deciphered, and the ions emitting in this spectral range were determined. We observed that with increasing particle concentration in the zone of laser spark, the radiation intensity increases. In this case, the intensity of ion lines with high degrees of ionization increases faster.

scholarly journals Reactive quenching of electronically excited NO<sub>2</sub><sup>∗</sup> and NO<sub>3</sub><sup>∗</sup> by H<sub>2</sub>O as potential sources of atmospheric HO<sub><i>x</i></sub> radicals

2018 ◽  
Vol 18 (19) ◽  
pp. 14005-14015 ◽  
Author(s):  
Terry J. Dillon ◽  
John N. Crowley
Keyword(s):  
Gas Phase ◽  
Laser Excitation ◽  
Pulsed Laser ◽  
Work Rate ◽  
Rate Coefficients ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Upper Limit ◽  
Upper Limits ◽  
Electronically Excited

Abstract. Pulsed laser excitation of NO2 (532–647 nm) or NO3 (623–662 nm) in the presence of H2O was used to initiate the gas-phase reaction NO2∗+H2O → products (Reaction R5) and NO3∗+H2O → products (Reaction R12). No evidence for OH production in Reactions (R5) or (R12) was observed and upper limits for OH production of k5b/k5<1×10-5 and k12b/k12<0.03 were assigned. The upper limit for k5b∕k5 renders this reaction insignificant as a source of OH in the atmosphere and extends the studies (Crowley and Carl, 1997; Carr et al., 2009; Amedro et al., 2011) which demonstrate that the previously reported large OH yield by Li et al. (2008) was erroneous. The upper limit obtained for k12b∕k12 indicates that non-reactive energy transfer is the dominant mechanism for Reaction (R12), though generation of small but significant amounts of atmospheric HOx and HONO cannot be ruled out. In the course of this work, rate coefficients for overall removal of NO3∗ by N2 (Reaction R10) and by H2O (Reaction R12) were determined: k10=(2.1±0.1)×10-11 cm3 molecule−1 s−1 and k12=(1.6±0.3)×10-10 cm3 molecule−1 s−1. Our value of k12 is more than a factor of 4 smaller than the single previously reported value.

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