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.

A simple method for the calibration of a supersonic molecular beam source

Vacuum ◽  
1980 ◽  
Vol 30 (3) ◽  
pp. 121-124 ◽  
Author(s):  
E D'Anna ◽  
G Leggieri ◽  
G Conforti ◽  
F Del Giallo ◽  
F Pieralli ◽  
...  
Keyword(s):  
Molecular Beam ◽  
Beam Source ◽  
Simple Method ◽  
Supersonic Molecular Beam

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.

Compact supersonic molecular beam source with a liquid nitrogen trap

1991 ◽  
Vol 62 (9) ◽  
pp. 2154-2158 ◽  
Author(s):  
Hidehiko Nonaka ◽  
Takashi Shimizu ◽  
Kazuo Arai
Keyword(s):  
Liquid Nitrogen ◽  
Molecular Beam ◽  
Beam Source ◽  
Supersonic Molecular Beam ◽  
Liquid Nitrogen Trap

High‐temperature supersonic molecular‐beam source

1992 ◽  
Vol 63 (8) ◽  
pp. 3939-3943 ◽  
Author(s):  
D. J. Auerbach ◽  
C. T. Rettner
Keyword(s):  
High Temperature ◽  
Molecular Beam ◽  
Beam Source ◽  
Supersonic Molecular Beam
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