The Normal Vibrations of Polyatomic Molecules as Calculated by Urey‐Bradley Field. II. Vibrations of Polythene, Ethane, and Their Deuterium Compounds

1949 ◽  
Vol 17 (8) ◽  
pp. 734-737 ◽  
Author(s):  
Takehiko Simanouti
Keyword(s):  
Polyatomic Molecules ◽  
Normal Vibrations

Distribution of the Lifetimes of Energized Polyatomic Molecules in the Harmonic Model

1992 ◽  
Vol 57 (6) ◽  
pp. 1173-1176
Author(s):  
Milan Šolc
Keyword(s):  
Numerical Study ◽  
Critical Value ◽  
Polyatomic Molecules ◽  
Lifetime Distribution ◽  
Uniform Density ◽  
Harmonic Model ◽  
Unimolecular Reactions ◽  
Normal Vibrations ◽  
Harmonic Vibrations ◽  
Linearly Independent

In the harmonic model of unimolecular reactions of polyatomic molecules, the decay of a molecule is defined as the passage of an internal coordinate (given by the superposition of normal vibrations) over a critical value. A numerical study of the behaviour of the superposition of harmonic vibrations with frequencies linearly independent in the field of rationals has shown that the distribution of time gaps between upzeros of the superposition over the critical value is not exponential. For molecules with uniform density of phases, however, the lifetime distribution is close to an exponential one.

Collective hyperspherical coordinates for polyatomic molecules and clusters

2000 ◽  
Vol 98 (21) ◽  
pp. 1763-1770 ◽  
Author(s):  
Vincenzo Aquilanti, Andrea Beddoni, Simonett
Keyword(s):  
Polyatomic Molecules ◽  
Hyperspherical Coordinates
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