Volume 127, Issue 4, 28 July 2007
Index of content:
127(2007); http://dx.doi.org/10.1063/1.2766936View Description Hide Description
We predict an anomaly in highly excited bending spectra of acetylene with high vibrational angular momentum. We interpret this in terms of a vibrational shape effect with moment of inertia backbending, induced by a sequence of bifurcations with a transition from “local” to “orthogonal” modes.
127(2007); http://dx.doi.org/10.1063/1.2768032View Description Hide Description
The matched asymptotic (singular perturbation) treatment of the nucleationequation [V. A. Shneidman, Sov. Phys. Tech. Phys.32, 76 (1987); 33, 1338 (1988)] is modified to include finite heating rate effects, which follow the isothermal transient stage. Despite the complicated mathematical structure of the discrete Becker-Döring equation, the obtained analytical solution is shown to be accurate numerically. The described situation is typical for two-step annealingcrystallization studies and can lead to reinterpretation of some of the classical experiments.