Measurements of the absolute intensities of spectral lines of Kr, Ar, and O ions in the wavelength range of 10 - 18 nm under pulsed laser excitation

2021 ◽  
Vol 51 (8) ◽  
pp. 700-707
Author(s):  
A V Vodop'yanov ◽  
S A Garakhin ◽  
I G Zabrodin ◽  
S Yu Zuev ◽  
A Ya Lopatin ◽  
...  
Keyword(s):  
Wavelength Range ◽  
Laser Excitation ◽  
Pulsed Laser ◽  
Spectral Lines ◽  
Absolute Intensities ◽  
The Absolute

Determination of the Absolute Intensities of Spectral Lines of the 12С2H4 Molecule

2018 ◽  
Vol 61 (6) ◽  
pp. 1074-1078
Author(s):  
Yu. S. Aslapovskaya ◽  
N. I. Raspopova
Keyword(s):  
Spectral Lines ◽  
Absolute Intensities ◽  
The Absolute

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.

scholarly journals Experimental stark widths and shifts of V II spectral lines

2020 ◽  
Vol 498 (2) ◽  
pp. 2068-2074 ◽  
Author(s):  
J Manrique ◽  
D M Díaz Pace ◽  
C Aragón ◽  
J A Aguilera
Keyword(s):  
Electron Density ◽  
Wavelength Range ◽  
Spectral Lines ◽  
Electron Density And Temperature ◽  
And Shifts

ABSTRACT We have measured the Stark widths and shifts of V II spectral lines in the wavelength range 2000–4200 Å belonging to 75 multiplets. The spectra are emitted by laser-induced plasmas generated from fused glass discs prepared by borate fusion. The electron density and temperature are in the ranges (0.72–6.5) × 1017 cm−3 and (11 000–14 900) K, respectively. To avoid self-absorption, we have used seven samples with vanadium concentrations selected by the CSigma graph methodology. This has allowed to include strong and weak lines in the study, including resonance and forbidden lines. The experimental widths and shifts are compared with theoretical values available in the literature.

Broadband Optical Limiting and CCD Sensor Protection From Nanosecond-Pulsed Laser Threat With Reverse Saturable Absorbers

1997 ◽  
Vol 479 ◽  
Author(s):  
V. Dentan ◽  
P. Feneyrou ◽  
F. Soyer ◽  
M. Vergnolle ◽  
P. Le Barny ◽  
...  
Keyword(s):  
Excited States ◽  
Nonlinear Optical ◽  
Laser Excitation ◽  
Pulsed Laser ◽  
Saturable Absorbers ◽  
Nanosecond Pulsed Laser ◽  
Optical Limiter ◽  
Linear And Nonlinear ◽  
Ccd Arrays ◽  
Pulsed Laser Irradiation

AbstractWe study in detail the linear and nonlinear optical properties of a heavy metal substituted naphthalocyanine reverse saturable absorber (RSA). The excited states involved in the RSA process under nanosecond pulsed laser excitation in the visible are fully characterized. We then demonstrate that this material can be used as an efficient optical limiter for protecting silicium CCD arrays from destruction due to nanosecond-pulsed laser irradiation in the visible.

Sign in / Sign up

Export Citation Format

Share Document