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Titolo:
THE 2345-MULTIMODE RESONANCE IN ACETYLENE - A BIFURCATION-ANALYSIS
Autore:
ROSE JP; KELLMAN ME;
Indirizzi:
UNIV OREGON,DEPT CHEM EUGENE OR 97403
Titolo Testata:
The Journal of chemical physics
fascicolo: 17, volume: 103, anno: 1995,
pagine: 7255 - 7268
SICI:
0021-9606(1995)103:17<7255:T2RIA->2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
EMISSION PUMPING SPECTRUM; HIGHLY EXCITED ACETYLENE; NORMAL-LOCAL TRANSITION; PHASE-SPACE EVOLUTION; FERMI RESONANCE; NORMAL-MODES; APPROXIMATE CONSTANTS; POLYATOMIC-MOLECULES; VIBRATIONAL-SPECTRA; OVERTONE SPECTRA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
64
Recensione:
Indirizzi per estratti:
Citazione:
J.P. Rose e M.E. Kellman, "THE 2345-MULTIMODE RESONANCE IN ACETYLENE - A BIFURCATION-ANALYSIS", The Journal of chemical physics, 103(17), 1995, pp. 7255-7268

Abstract

This paper reports on a classical phase space bifurcation analysis ofthe 2345 Fermi resonance of acetylene. The 2345 Fermi resonance is a multimode nonlinear, resonance coupling that is important to the vibrational dynamics and energy flow of highly excited acetylene. The bifurcation analysis is performed on an integrable Hamiltonian that represents a planar five-mode model of acetylene in which the nu(2), nu(3), nu(4), and nu(5) vibrational modes are nonlinearly coupled through the 2345 Fermi resonance. The phase space structures of the 2345 Fermi resonance are shown to be analogous to but more complicated than phase space structures of the two-mode, 1:1 and 2:1 Fermi resonance. The results are presented in terms of bifurcation diagrams and molecular catastrophe maps. The bifurcation analysis of this multidimensional system with a complicated multimode resonance is a step beyond the simple integrable, resonantly coupled two-mode systems that are now well understood. Analysis of this integrable system also represents a necessary step toward using a multiresonance, i.e., ''chaotic'' model to decipher the vibrational spectra of highly excited acetylene, based on knowledgeof the anharmonic modes born from bifurcations of the low-energy normal modes. (C) 1995 American Institute of Physics.

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Documento generato il 26/09/20 alle ore 12:00:23