Stable and unstable isotopes of the heavy noble gas xenon find use in various medical applications. However, apart from 133Xe, used for Single Photon Emission Computed Tomography, radioactive are currently complicated to obtain small quantities. With GAMMA-MRI project mind, we investigated a thermal sublimation generator long-lived excited state (isomer) 131mXe. This production method utilized ...

Multichromophoric molecules of conjugated N-substituted oxoporphyrinogens have been assembled on the Au(111) surface using solution and sublimation techniques. The operation of the oxoporphyrinogen moiety as a surface anchoring unit in the formation of molecular monolayers has been demonstrated.

We have observed about 16 absorption lines of the ν2 SO2 vibrational band on Io, in disk-integrated 19 μm spectra taken with the TEXES high spectral resolution mid-infrared spectrograph at the NASA Infrared Telescope Facility in November 2001, December 2002, and January 2004. These are the first ground-based infrared observations of Io’s sunlit atmosphere, and provide a new window on the atmosp...

Surface free energy is a criterion usually employed to identify the stability of a solid surface. Nanoparticles of face-centered cubic (fcc) noble metals are usually enclosed by the lowerenergy surfaces such as {111} and {100}, because these surfaces are believed to have the lowest energy, typically following g{111}<g{100}<g{110}. This criterion is proposed based on the assumption that the surf...

The subject of this paper is the attempt to reproduce the CO observed production rate curve of comet Hale-Bopp with a numerical model of the nucleus thermal evolution and chemical differentiation. Three possible mechanisms can contribute to the total measured CO production: 1) sublimation of CO from the nucleus; 2) release of gas of CO trapped in the amorphous water ice in the nucleus; 3) emiss...

The separation of an enantiomer from a racemic mixture is of primary relevance to the pharmaceutical industry. The thermochemical properties of organic enantiopure and racemate crystals can be exploited to design an enantioselective crystallization process. The thermodynamic difference between the two crystal forms is accessible by two cycles which give the eutectic composition in solution. The...

We have deposited CdTe thin films by close-spaced sublimation at two different temperature ranges. The films deposited at the lower temperature partially recrystallized after CdCl2 treatment at 350oC and completely recrystallized after the same treatment at 400oC. The films deposited at higher temperature did not recrystallize at these two temperatures. These results confirmed that the mechanis...

[1] Patterned grounds, like polygonal features, are the signature of climatic effects in periglacial regions on Earth. Identifying similar features on Mars is important for an understanding of the past Martian climate. In this study we mapped fresh patterned landforms from the systematic analysis of Mars Orbiter Camera high-resolution images. We show that most of them are distributed at latitud...