High Resolution CARS Spectroscopy of Polyatomic Molecules

1996 ◽  
pp. 148-151
Author(s):  
H. W. Schrötter ◽  
S. Anders ◽  
T. Bican ◽  
D. Illig ◽  
J. Jonuscheit ◽  
...  
Keyword(s):  
High Resolution ◽  
Polyatomic Molecules

X-RAY ABSORPTION SPECTRA OF SOME SMALL POLYATOMIC MOLECULES

2002 ◽  
Vol 09 (01) ◽  
pp. 159-164 ◽  
Author(s):  
K. C. PRINCE ◽  
R. RICHTER ◽  
M. DE SIMONE ◽  
M. CORENO
Keyword(s):  
Fine Structure ◽  
Excited State ◽  
High Resolution ◽  
Formic Acid ◽  
Absorption Spectra ◽  
Organic Molecules ◽  
Polyatomic Molecules ◽  
X Ray ◽  
Vibrational Progression ◽  
X Ray Absorption

We report the Near Edge X-ray Absorption Fine Structure Spectra (NEXAFS) of a series of oxygen-containing organic molecules, namely formaldehyde, acetaldehyde, acetone, formic acid, methanol and dimethyl ether (DME), measured with high resolution at the carbon and oxygen edges. A vibrational progression has been observed at the oxygen 1s → π* resonance of formaldehyde, indicating that this state is bound with an excited state C=O stretching frequency of 136 meV. The spectra are compared with previous measurements and the applicability of the chromophore concept is tested for the functional groups present in these molecules.

scholarly journals High Resolution Proton Energy Loss Spectroscopy of High Overtone Levels of Polyatomic Molecules

1991 ◽  
Vol 11 (3-4) ◽  
pp. 247-252 ◽  
Author(s):  
W. Maring ◽  
J. P. Toennies
Keyword(s):  
High Resolution ◽  
Energy Loss ◽  
Inelastic Scattering ◽  
Proton Energy ◽  
Polyatomic Molecules ◽  
High Degree ◽  
Collision Mechanism ◽  
Very High ◽  
High Overtone ◽  
Anharmonicity Constants

In the inelastic scattering of nearly monoenergetic proton beams (≅ 20 e V) from polyatomic molecules such as CF4 sharp peaks are observed corresponding to the excitation of very high overtone levels (n ≤ 14) of the infrared active modes. The collision mechanism leading to the high degree of excitation is described and an example from recent experiments is presented. A fit of the CF4 spectra provides new anharmonicity constants for the ν3-mode.

scholarly journals High-Resolution “Magic”-Field Spectroscopy on Trapped Polyatomic Molecules

2021 ◽  
Vol 127 (17) ◽  
Author(s):  
Alexander Prehn ◽  
Martin Ibrügger ◽  
Gerhard Rempe ◽  
Martin Zeppenfeld
Keyword(s):  
High Resolution ◽  
Polyatomic Molecules ◽  
Field Spectroscopy

High resolution molecular photoelectron spectroscopy I. Fine structure in the spectra of hydrogen and oxygen

1968 ◽  
Vol 307 (1488) ◽  
pp. 15-26 ◽  
Keyword(s):  
Fine Structure ◽  
High Resolution ◽  
Energy Resolution ◽  
Electrostatic Field ◽  
Photoelectron Spectroscopy ◽  
Energy Analysis ◽  
Polyatomic Molecules ◽  
Fundamental Limits ◽  
Line Widths

The processes which set fundamental limits to the minimum line widths observable in photo­electron spectroscopy are outlined. An over-all limit of about 0.002 eV is deduced as the smallest attainable line w idth in ordinary circumstances. A photoelectron spectrometer is de­scribed which uses focusing deflexion in a radial electrostatic field for energy analysis. This instrum ent has energy resolution of 0.015 eV, smaller than the normal width of rota­tional envelopes in spectra of polyatomic molecules. The applications to the study of mole­cular hydrogen and oxygen is described.

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