Several CdTe crystals doped with vanadium (V) or titanium (Ti) were grown by a vertical Bridgman technique and the Sublimation Travelling Heater Method (STHM). Spatially resolved resistivity ...measurements were performed using the Time Dependent Charge Measurement (TDCM) method. It is shown that V doping leads to a more homogeneous resistivity distribution in contrast to Ti. Photoinduced Current Transient Spectroscopy (PICTS) has been used to characterize the deep levels. Up to three additional levels are introduced through the doping with transition metals.
Momentum transfer by astrophysical jets Chernin, Lawrence; Masson, Colin; Gouveia dal Pino, Elisabete M. ...
The Astrophysical journal,
05/1994, Letnik:
426
Journal Article
Early- and middle-stage copepodids of Anthosoma crassum (Dichelesthiidae: Siphonostomatoida) and lesions associated with A. crassum infections are described from samples collected from the jaws of ...shortfin makos captured off southern California. The copepodids did not possess frontal filaments or frontal organs, and they resided in a headstandlike position firmly attached by their embedded antennae. Copepod larvae and small adults were lodged in shallow mucosal ulcers that basally exhibited mild, acute granulocytic stomatitis; large adults were lodged in deep tunnels encompassing the anterior aspects of their bodies. Some lesions contained more than 1 copepod. Examinations of lesions revealed that A. crassum infection of shortfin makos can result in severe subacute, necrotizing stomatitis with hemorrhage, granulation tissue, and lymphocytic aggregations in the mucosa, and reactive lymphocytic infiltration of the submucosal skeletal muscle. Copepod gut contents consisted of shark erythrocytes, hemosiderin granules, and necrotic host cells. These observations, along with reports of sharks heavily infected with A. crassum, suggest that this copepod may sometimes play a role in the morbidity and mortality of sharks that it infects.
The Characterizing ExOPlanet Satellite (CHEOPS) mission was selected in October 2012 by ESA as the first small mission. It will be a ultra-high precision photometer dedicated to the observation of ...transits of known exoplanets on bright stars, for which the mass has already been measured via ground-based spectroscopic surveys. Its precision will allow the accurate determination of the planetary radii and, by consequence, the planetary bulk density. CHEOPS will also unveil transiting exoplanets of interest for in-depth characterization, a legacy for future instruments suited to the spectroscopic characterization of exoplanetary atmospheres.
Adult male and female, nauplius 1 and 2, and preadult 1 and 2 stages of Paralebion elongatus Wilson, 1911 (Copepoda: Euryphoridae) are redescribed and described, respectively, from specimens ...collected from aquarium-held reef whitetip sharks (Triaenodon obesus) captured in Hawaiian waters. A circular area of villiform papillae between the frontal plates in the adult stage supports evidence that this region does not have a chemosensory function. Time-of-capture data suggest that P. elongatus can complete its life cycle in a captive environment.
Knudsen cell mass spectrometry has been applied to study the quasi-binary system CdTe–ZnTe at 900
K. Composition of the vapors, vapor pressures, activities, and free energy of mixing were determined. ...Activities of CdTe were shown to have negative deviation from ideal behavior, whereas those of ZnTe exhibited positive deviation. Free energy of mixing in CdTe–ZnTe is more negative than that of the ideal solution. Pressure–composition
P–
X section of the Pressure–temperature–composition
P–
T–
X phase diagram was constructed, and relationship between the composition of the crystal, vapor pressure and composition of the vapor was determined in the whole concentration range. At 900
K, CdTe–ZnTe was found to be a continuous solid solution with no phase separation and without congruent sublimation.
The stability of an isolated macrostep under a temperature gradient is discussed theoretically for the growth of III–V-semiconductors from a metallic solution, such as liquid phase epitaxy (LPE) and ...the travelling heater method (THM). To find the distribution of solute at the surface of one macrostep, the two-dimensional diffusion equation is solved, taking into account anisotropic interface kinetics as an important boundary condition. By analyzing the influence of growth rates and additional temperature gradients at the growth face it is found for the behavior of a macrostep, that for decreasing growth rates and for increasing temperature gradients the macrostep gets unstable and disappears. Details about the calculation and a comparison with experimental results from space grown crystals are presented.
Context. The space telescope CoRoT searches for transiting extrasolar planets by continuously monitoring the optical flux of thousands of stars in several fields of view. Aims. We report the ...discovery of CoRoT-10b, a giant planet on a highly eccentric orbit (e = 0.53 ± 0.04) revolving in 13.24 days around a faint (V = 15.22) metal-rich K1V star. Methods. We used CoRoT photometry, radial velocity observations taken with the HARPS spectrograph, and UVES spectra of the parent star to derive the orbital, stellar, and planetary parameters. Results. We derive a radius of the planet of 0.97 ± 0.07 RJup and a mass of 2.75 ± 0.16 MJup. The bulk density, ρp = 3.70 ± 0.83 g cm-3, is ~2.8 that of Jupiter. The core of CoRoT-10b could contain up to 240 $M_\oplus$ of heavy elements. Moving along its eccentric orbit, the planet experiences a 10.6-fold variation in insolation. Owing to the long circularisation time, τcirc > 7 Gyr, a resonant perturber is not required to excite and maintain the high eccentricity of CoRoT-10b.
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