نتایج جستجو برای: rotational band
تعداد نتایج: 163747 فیلتر نتایج به سال:
Large solute translational energy leads to homogeneous line broadening in transient spectra due to the increased frequency of perturbing interactions with the solvent cage. Furthermore small solute rotation has been shown to be relatively unhindered in perfluorocarbon (PFC) solutions, leading to the observation of significant P and R rotational band structure in the absorption spectrum. Indeed ...
High resolution infrared spectra of He(N)-CO2 clusters with N up to 17 have been studied in the region of the CO2 nu(3) fundamental band. The B rotational constant initially drops as expected for a normal molecule, reaching a minimum for N=5. Its subsequent rise for N=6 to 11 can be interpreted as the transition from a normal (though floppy) molecule to a quantum solvation regime. For N>13, the...
Proton-decoupled Fourier transform nuclear magnetic resonance spectroscopy of natural abundance 13C was used to obtain spectra of cyanoferrimyoglobin of sperm whale (Physeter catadon) at 14.1 and 23.5 kG. Comparison of the spin lattice relaxation times at these two field strengths allowed the unambiguous assignment of a rotational correlation time of 22 plus or minus 5 ns for the alpha carbon r...
We use (1 + 10) resonance-enhanced multiphoton photodissociation (REMPD) to detect the population in individual rovibronic states of trapped HfF with a single-shot absolute efficiency of 18%, which is over 200 times better than that obtained with fluorescence detection. The first photon excites a specific rotational level to an intermediate vibronic band at 35000–36500 cm , and the second photo...
This paper describes development of water hydraulic proportional valves. The valves are spool-type and the spool is driven by a stepping motor and positive cam mechanism. The cam is always placed between two cam followers and the return spring is omitted. The rotational angle of the cam and the displacement of the spool is linear. The experimental results of static characteristics are also show...
Considering a two-dimensional lattice of weakly coupled waveguides, where each waveguide may carry two orthogonal modes of dipolar character, we present a nonlinear discrete vector model for the study of Kerr optical solitons with profiles having a reduced symmetry relative to the underlying lattice. We describe analytically and numerically existence and stability properties of such states in s...
We report a λ > ∼ 1 cm search for rotational molecular absorption towards quasars, now possible with the upgraded Australia Telescope Compact Array (ATCA). The targets were PKS 0201+113, PKS 0336–017 and Q 0537–286, where known damped Lyman-alpha absorption systems (DLAs) could cause redshifted molecular absorption in the 12 mm band of the telescope. We place 3σ upper limits on any HCO 0 → 1 ab...
The rotational band structure of the Z=104 nucleus (256)Rf has been observed up to a tentative spin of 20ℏ using state-of-the-art γ-ray spectroscopic techniques. This represents the first such measurement in a superheavy nucleus whose stability is entirely derived from the shell-correction energy. The observed rotational properties are compared to those of neighboring nuclei and it is shown tha...
Polar molecules in selected quantum states can be guided, decelerated, and trapped using electric fields created by microstructured electrodes on a chip. Herein we explore how transitions between two of these quantum states can be induced while the molecules are on the chip. We use CO (a(3) Π(1) , v=0) molecules, prepared in the J=1 rotational level, and induce the J=2←J=1 rotational transition...
The rotationally resolved electronic spectra of the electronic origin of the 7-azaindole-(H(2)O)(1) and of the 7-azaindole-(H(2)O)(2) clusters have been measured in a molecular beam. From the rotational constants the structures in the S(0) and S(1) electronic states were determined as cyclic with the pyrrolo NH and the pyridino N atoms being bridged by one and two water molecules, respectively....
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