The thermal neutron background at Laboratorio Subterráneo de Canfranc (LSC) has been determined using several 3He proportional counter detectors. Bare and Cd shielded counters were used in a series of long measurements. Pulse shape discrimination techniques applied to discriminate between gamma signals as well other intrinsic contributions. Montecarlo simulations allowed us estimate the sensiti...

The ultrafast spatial and temporal dynamics of excited carriers are important to understanding the response of materials to laser pulses. Here we use scanning ultrafast electron microscopy to image the dynamics of electrons and holes in silicon after excitation with a short laser pulse. We find that the carriers exhibit a diffusive dynamics at times shorter than 200 ps, with a transient diffusi...

Diffusion kinetics and structural properties of chemically strengthened titania-doped soda-lime silicate glasses were studied by depth-resolved X-ray photoelectron spectroscopy, Raman spectroscopy spectrophotometry. The ion exchanged, whereby Na+ in the glass was replaced K+ a molten salt bath, at four different treatment temperatures between 350 500 °C. alkali diffusion coefficient, DK-Na, cor...

As part of an integrated consortium study, we have undertaken O, Cd, Cr, Si, Te, Ti, and Zn whole rock isotopic measurements the Winchcombe CM2 meteorite. δ66Zn values determined for two aliquots are +0.29 ± 0.05‰ (2SD) +0.45 (2SD). The difference between these analyses likely reflects sample heterogeneity. isotope compositions show excellent agreement with published data. δ114Cd a single aliqu...

Formation of continuous and adherent diamond films on practical substrates presents a formidable challenge due to lack nucleation sites needed for growth. This problem has been solved through the formation interfacial Q-carbon layers by nanosecond laser melting carbon in highly undercooled state subsequent quenching. The layer provides ready epitaxial planar matching such as sapphire, polycryst...

The efflux of Mg++ from squid axons subject to internal solute control by dialysis is a function of ionized [Mg], [Na], [ATP], and [Na]o. The efflux of Mg++ from an axon with physiological concentrations of ATP, Na, and Mg inside into seawater is of the order of 2-4 pmol/cm2s but this efflux is strongly inhibited by increases in [Na]i, by decreases in [ATP]i, or by decreases in [Na]o. The efflu...

18O and 2H diffusion has been investigated at a temperature of 300 °C in the double perovskite material PrBaCo2O5+δ (PBCO) in flowing air containing 200 mbar of 2H216O. Secondary ion mass spectrometry (SIMS) depth profiling of exchanged ceramics has shown PBCO still retains significant oxygen diffusivity (~1.3 × 10-11 cm2s-1) at this temperature and that the presence of water (2H216O), gives ri...

Abstract Supercritical fluids are alternatives to conventional harmful organic compounds. In the case of supercritical fluid extraction, CO2 is most common solvent and can be advantageously modified with small contents co-solvents like ethanol ethyl acetate. The rigorous estimation tracer diffusion coefficients (D12) solutes in mixtures (CO2 + co-solvent) requires their individual D12 values pu...

We report on the synthesis of multifunctional microdiamonds by chemical vapor deposition (CVD) 304 and 316 austenitic stainless steel (SS) substrates. The increase in wettability achieved surface scratching structure ultra-dense Q-carbon high nucleation density minimized strains diamond films. Notably, these films exhibit a amount twinning, leading to formation five-fold microdiamonds. diamonds...

Miller Range (MIL) 07687 is a peculiar carbonaceous chondrite officially classified as CO3. However, it has been found to display unique petrographic properties that are atypical of this group. Moreover, Raman spectra its polyaromatic matter does not reflect structural order consistent with the metamorphic history type 3 chondrite. As result, suggested be an ungrouped C2 CO affinities, although...