scholarly journals Lifetime Measurements Of CaCl∗(A2Π) In A Molecular Beam

1990 ◽  
Vol 10 (4) ◽  
pp. 239-246 ◽  
Author(s):  
E. Verdasco ◽  
V. Sáez Rabanos ◽  
H. H. Telle ◽  
A. GonzáLez Urena
Keyword(s):  
Molecular Beam ◽  
Laser Induced Fluorescence ◽  
Lifetime Measurements ◽  
Vibrational Levels

An effusive thermal molecular beam of CaCI was produced vapourizing a mixture of Ca and CaCI2 within a crucible with subsequent expansion into vacuum. Lifetimes of CaCl∗(A2Π) in its two lowest vibrational levels were measured under collision-free conditions using laser-induced fluorescence, and values around 33 ns are found; these are discussed with respect to other available data.

A study of the A2Π/B2Σ+ – X2Σ+ band systems of calcium monohydride (CaH) using a supersonic molecular beam source and laser-induced fluorescence detection

2004 ◽  
Vol 82 (6) ◽  
pp. 779-790 ◽  
Author(s):  
T C Steimle ◽  
Jamie Gengler ◽  
Jinhai Chen
Keyword(s):  
Molecular Beam ◽  
Band System ◽  
Energy Levels ◽  
Laser Induced Fluorescence ◽  
Effective Hamiltonian ◽  
Beam Source ◽  
Supersonic Molecular Beam ◽  
Laser Induced Fluorescence Detection ◽  
Local Perturbations ◽  
Beam Sample

The high-resolution laser-induced fluorescence spectrum of a molecular beam sample of calcium monohydride (CaH) in the region of the strongly overlapped (1,0) A2Π – X2Σ+ and (0,0) B2Σ+ –  X2Σ+ band systems near 630 nm and the (0,0) A2Π –  X2Σ+ band system near 690 nm have been recorded and analyzed. The spectral features exhibit a small splitting that is attributed to proton magnetic hyperfine interaction in the X2Σ+ (v = 0) state. The energy levels of the A2Π(v = 0) vibronic state were modeled using a traditional "effective" Hamiltonian approach, whereas those for the interacting A2Π(v = 1)/B2Σ+(v = 0) vibronic levels were modeled by augmenting the traditional effective Hamiltonian with terms to account for local perturbations. An interpretation of the field-free parameters is presented.Key words: calcium monohydride, molecular beam, fluorescence.

Radiative lifetime measurements of SiH(A2Δ) by laser-induced fluorescence

1984 ◽  
Vol 108 (6) ◽  
pp. 560-561 ◽  
Author(s):  
W. Bauer ◽  
K.H. Becker ◽  
R. Düren ◽  
C. Hubrich ◽  
R. Meuser
Keyword(s):  
Radiative Lifetime ◽  
Laser Induced Fluorescence ◽  
Lifetime Measurements

scholarly journals Pyrimidine, an Intermediate State Molecule?

1986 ◽  
Vol 5 (6) ◽  
pp. 339-350 ◽  
Author(s):  
W. Leo Meerts ◽  
W. A. Majewski
Keyword(s):  
Excited State ◽  
High Resolution ◽  
Ring Laser ◽  
Fluorescence Spectra ◽  
Molecular Beam ◽  
Energy Levels ◽  
Laser Induced Fluorescence ◽  
Spectral Features ◽  
Electronically Excited State ◽  
Electronically Excited

The S1(1B1) ← S0(1A1) transition in pyrazine has been investigated. High resolution laser induced fluorescence spectra were obtained by crossing a well collimated molecular beam with UV radiation of an intra-cavity frequency doubled ring laser. The extreme resolution enabled us to observe the molecular eigenstates of the electronically excited state. Most of the spectral features of the S1 state could be interpreted in terms of a slightly perturbed axis switched rotor spectrum. The perturbations show up both in the energy levels of the S1 and in the intensities of the observed transitions.

Double-resonance measurements of vibrational levels populated by infrared multiphoton excitation of CF3I in a molecular beam

1993 ◽  
Vol 215 (5) ◽  
pp. 461-469 ◽  
Author(s):  
Ger van den Hoek ◽  
Mark Jonker ◽  
David H. Parker ◽  
Craig A. Taatjes ◽  
Steven Stolte
Keyword(s):  
Molecular Beam ◽  
Double Resonance ◽  
Multiphoton Excitation ◽  
Vibrational Levels
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