Stability of Relative Equilibria. Part II: Dumbell Satellites

In the second part a practically important problem, namely the stability of relative equilibria of a dumbell satellite on an orbit around the Earth is treated by means of the reduced energy-momentum method. The dumbell satellite is used to emphasize the advantages of the reduced energy-momentum method which did not become obvious in the simple example of the rotating pendulum treated in Part I, as well as, to discuss some of the finer technical details.     

分子反应动态学中的势能面和非线性

势能面在分子反应动态学中起着无以替代的作用，对它的研究始终是化学物理学界的一个热点问题，而一性科学技术的发展和应用，又为分子反应动态学展示了许多丰富多彩的内容。同时，这两个领域又有许多交叉点。本文综述了这两个领域的最新进展。     

Dynamics of surface dipole and tripole solitons in nonlocal nonlinear media with optical lattice field

We find the existence conditions for stationary dipole and tripole surface solitons formed at the interface of a nonlocal nonlinear medium and a lattice with linearly modulated frequency. We investigate how the degree of nonlocality, the depth, and the modulation frequency of the optical lattice field affect on the existence of the surface solitons and their dynamics. The relationship between the power and the model parameters is identified. The stability of the surface dipole and tripole solitons is numerically investigated.     

Structural and dynamical properties of iridium surfaces: First principles and molecular dynamics investigations

The structural and dynamical properties of Ir(1 0 0) clean surface are investigated in the temperature range 100-1100 K. We performed molecular dynamics (MD) simulations using the interaction potential energies obtained from the density-functional theory (DFT) and plane-wave pseudopotential (PWPP) method. The obtained contraction of the first interlayer distance, d₁₂ , decreases from −4.94% at 100 K to −4.84% at 1100 K. This decrease deviates by 11.8% at 100 K to 13.6% at 1100 K, from that at 0 K (−5.6%). The expansion of the second interlayer distance, d₂₃, however increases from 0.89% at 100 K to 1% at 1100 K, causing a deviation that ranges from −11% to 0% from that at 0 K (1%). The deviation of the calculated surface vibrational frequencies and surface relaxations over the entire range of temperatures (100-1100 K) is rather modest as a result of small anharmonic effects of the surface.     

Adsorption kinetics and dynamics of small organic molecules on a silica wafer: Butane, pentane, nonane, thiophene, and methanol adsorption on SiO2/Si(1 1 1)

The adsorption kinetics (by thermal desorption spectroscopy) and adsorption dynamics (by molecular beam scattering) have been determined for a number of alkanes, methanol, thiophene, and water on a silica wafer—SiO₂/Si(1 1 1). No indications for bond activation were present, i.e., all probe molecules adsorb molecularly obeying 1st order kinetics. The coverage-dependent heat of adsorption has been determined accordingly. The adsorption dynamics are precursor-mediated with Kisliuk-like shapes of the adsorption probabilities at low impact energies and adsorbate-assisted adsorption at large impact energies.