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Titolo:
A classical algebraic approach to the bend motion of acetylene: the formalism by two coupled cosets
Autore:
Wu, GZ;
Indirizzi:
Tsing Hua Univ, Dept Phys, Ctr Adv Study, Beijing 100084, Peoples R China Tsing Hua Univ Beijing Peoples R China 100084 ng 100084, Peoples R China
Titolo Testata:
CHEMICAL PHYSICS
fascicolo: 3, volume: 252, anno: 2000,
pagine: 315 - 321
SICI:
0301-0104(20000201)252:3<315:ACAATT>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTRAMOLECULAR VIBRATIONAL REDISTRIBUTION; DISPERSED FLUORESCENCE-SPECTRA; EMISSION PUMPING SPECTROSCOPY; HIGHLY EXCITED ACETYLENE; APPROXIMATE CONSTANTS; INTERNAL ENERGY; DYNAMICS; STATE; (C2H2)-C-12; SYMMETRY;
Keywords:
coset approach; acetylene; survival probability of action transfer;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Wu, GZ Tsing Hua Univ, Dept Phys, Ctr Adv Study, Beijing 100084, Peoples RChina Tsing Hua Univ Beijing Peoples R China 100084 84, Peoples R China
Citazione:
G.Z. Wu, "A classical algebraic approach to the bend motion of acetylene: the formalism by two coupled cosets", CHEM PHYS, 252(3), 2000, pp. 315-321

Abstract

It is shown that the bend Hamiltonian of acetylene of Darling-Dennison bend I, II and vibrational l doubling resonances can be modeled by two coupledsu(2) algebras which, in turn, can be expressed in terms of the dynamical variables of two coupled SU(2)/U(1) coset spaces in a classical way. For a fixed total action N-b and vibrational angular momentum l, there is an energy range associated. The analysis shows that the survival probability of the actions initially stored in the trans mode to cis mode does not depend much on N-b. 1 Or the energy which a state possesses. Instead, it is demonstrated that as N-b is up to 22 and l is small (such as 0) the states in the higher energy region possess significantly larger survival probabilities of this decay. It is also the survival probabilities of these states that are suppressed considerably by the vibrational angular momentum. This simulation is discussed along with the recent observation by Field's group [M.P. Jacobson, J.P. O'Brien, R.J. Silbey, R.W. Field, J. Chem. Phys. 109 (1998) 121; M.P. Jacobson, J.P. O'Brien, R.W. Field, J. Chem. Phys. 109 (1998) 3831; M.P. Jacobson, R.J. Silbey, R.W. Field, J. Chem. Phys. 110 (1999) 845] thatbend dynamics of acetylene shows anomalously simple behavior and strong, quasiperiodic oscillators in its survival probability as N-b approaches 22. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 09/07/20 alle ore 20:45:19