Femtosecond vacuumultraviolet pulses from amonochromated high harmonic generation source excite vibrational wavepackets in the B1 g S + state ofD2. Thewavepacketmotion ismeasured through strongfield ionization into bound and dissociative ion states yielding D2 + andD products. The time dependence of the D2 + andD ion signals provides a sensitive fingerprint of the quantumnuclear wavepacket, due...

This review paper aims to present an updated review of papers, conference papers, books, dissertations dealing with nonlinear vibrations of circular cylindrical thin shells. This paper surveyed mathematically, experimentally, analytically, numerically analyzed vibrations of cylindrical shells. This includes shells of open type, closed type, with and without fluid interactions; shells subjected ...

We study stochastic resonance in a bistable system which is excited simultaneously by white and harmonic noise which we understand as the signal. In our case the spectral line of the signal has a nite width as it occurs in many real situations. Using techniques of cumulant analysis as well as computer simulations we nd that the eeect of stochastic resonance is preserved in the case of harmonic ...

We theoretically analyze collective modes in unconventional superconductors focusing on the Bardasis-Schrieffer (BS) mode and its contribution to third-harmonic generation currents. Starting from a model with competing superconducting pairing instabilities we add fluctuations of fields beyond saddle point approximation calculate their response driving electric field. To phase appropriately take...

We report on generation of third harmonic from nitrogen molecules on the excited state with a weak driver laser pulse at a mid-infrared wavelength. The excited nitrogen molecules are generated using a circularly polarized intense femtosecond pulse which produces energetic electrons by photoionization to realize collisional excitation of nitrogen molecules. Furthermore, since the third harmonic ...

The method of effective interaction, traditionally used in the framework of an harmonic oscillator basis, is applied to the hyperspherical formalism of few–body nuclei (A = 3 ÷ 6). The separation of the hyperradial part leads to a state dependent effective potential. Undesirable features of the harmonic oscillator approach associated with the introduction of a spurious confining potential are a...

In this work, a large-scale Brushless Doubly Fed Machine (BDFM) built in frame size D400 is tested at different operating conditions in order to examine its noise and vibration levels. A series of measurements were conducted on the machine to establish the main modes of excitation of vibration and noise developed by the machine. The harmonic spectrums of the vibration amplitudes are presented a...

Abstract Both the test system and testing technology are inseparable from selection construction of excitation signal. This paper shows signals including transient excitation, harmonic random signal etc, which commonly used in time domain, frequency correlation analysis stimulus-response test. Moreover, design method is introduced based on principle identification, combined with research engine...