Publications by authors named "V A Herrero"

A detailed analysis of the low collision energy (0.03-10 meV) integral reaction cross-section has been carried out for the F + HD ( = 0, 1; = 1)→ HF(DF) + D(H) reaction using accurate, fully converged time-independent hyperspherical quantum dynamics. Particular attention has been paid to the shape (orbiting) resonances and their assignment to the orbital () and total () angular momenta as well as to the product's state resolved cross-sections at the energies of the resonances.

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Noble element time projection chambers are a leading technology for rare event detection in physics, such as for dark matter and neutrinoless double beta decay searches. Time projection chambers typically assign event position in the drift direction using the relative timing of prompt scintillation and delayed charge collection signals, allowing for reconstruction of an absolute position in the drift direction. In this paper, alternate methods for assigning event drift distance via quantification of electron diffusion in a pure high pressure xenon gas time projection chamber are explored.

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Plasmonic substrates are widely reported for their use in the manipulation of sub-wavelength particles. Here we analyze the optical force in the terahertz (THz) spectrum acting on a dielectric nanoparticle when located close to a graphene monolayer. When lying on a dielectric planar substrate, the graphene sheet enables the nano-sized scatterer to excite a surface plasmon (SP) well confined on the dielectric surface.

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In this Letter, a simple structure formed by a metallic thin layer covering a high-index substrate is used to design an optical tweezer. Owing to the interaction between the field scattered by the particle with an incident plane wave and the proposed structure, a pulling or attractive component of the optical force emerges. This component results in enhancement thanks to the surface plasmons (SPs) excitation arising from the elliptical polarization of the induced dipole moment on the particle.

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Article Synopsis
  • An experiment was conducted using a rectangular channel with four inclined cylindrical rods to measure pressures and pressure drops while varying the rods' angles.
  • The study involved testing three different diameters of rods and applying momentum conservation principles to analyze the data, resulting in dimensionless parameter groups relating pressure to rod characteristics.
  • The findings confirmed that the independence principle applies to most Euler numbers, showing that pressure measurements remain consistent regardless of inclination when normalized by the inlet velocity vertical to the rods, aiding in the design of similar hydraulic systems.
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