LIF Measurements on the C2Σ+–X2IIr Transitions of the CD Radical

1993 ◽  
Vol 47 (11) ◽  
pp. 1772-1774
Author(s):  
F. Hummernbrum ◽  
H. Kempkens ◽  
A. Ruzicka ◽  
C. Schiffer ◽  
J. Uhlenbusch ◽  
...  
Keyword(s):  
Light Source ◽  
Laser Induced Fluorescence ◽  
Dye Laser ◽  
Vibrational Band ◽  
Spin Splitting ◽  
Doppler Broadening ◽  
Uv Laser ◽  
Small Bandwidth ◽  
Splitting Constant ◽  
Line Positions

Laser-induced fluorescence (LIF) measurements are made on the C2Σ+- X2II r (λ = 314 nm) transition of CD, which is produced by a microwave-excited Ar/CD4 process plasma. The experiment is realized by using a frequency-doubled cw ring dye laser as the tunable light source. Due to the small bandwidth (≈3 MHz) of the exciting UV laser, the exact line positions of spin-doubled rotational lines in the P-branch ( N” = 2 to 5 and N” = 8 to 13) of the first vibrational band ( v’ = v” = 0) could be determined. The resolution is limited only by Doppler broadening, which amounts in our plasma ( T = 450 K) to about 4 GHz. With these new values of line positions, a modified spin-splitting constant of γ = 0.051 ± 0.006 cm−1 is calculated.

Is UV laser induced fluorescence a method to monitor tropospheric OH?

1980 ◽  
Vol 7 (11) ◽  
pp. 905-908 ◽  
Author(s):  
G. Ortgies ◽  
K.-H. Gericke ◽  
F. J. Comes
Keyword(s):  
Laser Induced Fluorescence ◽  
Uv Laser

scholarly journals Mobile lidar system for environmental monitoring

2018 ◽  
Vol 176 ◽  
pp. 07002
Author(s):  
Guangyu Zhao ◽  
Ming Lian ◽  
Yiyun Li ◽  
Zheng Duan ◽  
Shiming Zhu ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Environmental Monitoring ◽  
Nd:Yag Laser ◽  
Field Experiments ◽  
Laser Induced Fluorescence ◽  
Dye Laser ◽  
Lidar System ◽  
Sensing System ◽  
Atomic Mercury

A versatile mobile remote sensing system for multidisciplinary environmental monitoring tasks on the Chinese scene is described. The system includes a 20 Hz Nd:YAG laser-pumped dye laser, optical transmitting/receiving systems with a 30 cm and a 40 cm Newtonian telescope, and electronics, all integrated in a laboratory, installed on a Jiefang truck. Results from field experiments on atomic mercury DIAL mapping and remote laser-induced fluorescence and break-down spectroscopy are given.

Nanosecond and Femtosecond UV Laser Ablation of CdTe (100): Time-Of-Flight and Angular Distributions

1993 ◽  
Vol 334 ◽  
Author(s):  
P.D. Brewer ◽  
M. Späth ◽  
M. Stuke
Keyword(s):  
Laser Ablation ◽  
High Resolution ◽  
Mass Spectrometer ◽  
Multiphoton Ionization ◽  
Time Of Flight ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Dye Laser ◽  
Angular Distributions ◽  
Uv Laser

AbstractAngularly resolved time-of-flight (TOF) measurements have been used to probe the velocity and angular distributions of Cd atoms and Te2 molecules ejected from CdTe (100) substrates under irradiation by 248 nm nanosecond and sub-picosecond laser pulses. These experiments employ a dye laser TOF mass spectrometer with resonance enhanced multiphoton ionization for sensitive, high resolution detection of the desorbed products. The velocity distributions are well described by Maxwell-Boltzmann distributions for low fluence nanosecond (<60 mJ/cm2) and sub-picosecond (<3.3 mJ/cm2) pulses. Angular flux distributions for nanosecond irradiation are observed to be highly forward peaked about the surface normal, whereas, for sub-picosecond irradiation the distribution approaches cos3θ.

Carbon dioxide UV laser-induced fluorescence in high-pressure flames

2003 ◽  
Vol 375 (3-4) ◽  
pp. 344-349 ◽  
Author(s):  
W.G. Bessler ◽  
C. Schulz ◽  
T. Lee ◽  
J.B. Jeffries ◽  
R.K. Hanson
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Laser Induced Fluorescence ◽  
Uv Laser

Electronic spectra of metal ion – rare gas pairs: High resolution analysis of the A2Πr–X2Σ+ system of BeKr+

1977 ◽  
Vol 55 (3) ◽  
pp. 254-260 ◽  
Author(s):  
J. A. Coxon ◽  
W. E. Jones ◽  
K. V. Subbaram
Keyword(s):  
High Resolution ◽  
Metal Ion ◽  
Isotope Effects ◽  
Spin Splitting ◽  
Rare Gas ◽  
Molecular Constants ◽  
Naturally Occurring ◽  
High Resolution Analysis ◽  
Resolution Analysis ◽  
Splitting Constant

The A2Πr–X2Σ+ system of Be84Kr+ has been studied at high resolution in the region 3950–4265 Å. Rotational analyses have been performed for the 0–1, 0–0, 1–0, and 2–0 bands, and molecular constants have been determined by least squares fits of the line frequencies to model Hamiltonians. The regular nature of the excited state has been confirmed, despite the opposite signs found for the Λ-doubling constants, p and q. Comparisons of the Λ-doubling constants for the A2Πr state and of the spin-splitting constant (γ) for the X2Σ+ state have been made with those for other nine valence-electron diatomics. Although a systematic study of isotope effects due to the several isotopes of naturally-occurring krypton has not been possible, at least one branch of the 1–0 band of Be86Kr+ has been identified unequivocally.

Sign in / Sign up

Export Citation Format

Share Document